Emerson EZH Series User manual
EZH and EZHSO Series
Pressure Reducing Regulators
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WARNING
Failure to follow these instructions or to
properly install and maintain this equipment
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causing property damage and personal injury
or death.
Fisher™ regulators must be installed,
operated and maintained in accordance
with federal, state and local codes,
rules and regulations and Emerson
Process Management Regulator
Technologies, Inc. (Emerson) instructions.
If the regulator vents gas or a leak develops in
the system, service to the unit may be required.
Failure to correct trouble could result in a
hazardous condition.
Call a gas service person to service the unit.
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the regulator.
Introduction
Scope of the Manual
This manual provides installation, startup and maintenance
instructions and parts ordering information for the EZH and
EZHSO Series pressure-reducing regulators, PRX Series
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on other equipment used with this regulator is found in
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Product Description
EZH Series (Spring-to-Close) and EZHSO Series (Spring-
to-Open) regulators are accurate pilot-operated, pressure-
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in high pressure natural gas transmission/city gate stations,
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They provide smooth and reliable operation, tight shutoff and
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Figure 1. EZH Series Pressure Reducing Regulator
TYPE PRX/120 TYPE PRX/120-AP
Figure 2. PRX Series Pressure Reducing Pilots
Instruction Manual
D103077X012
November 2017
EZH and EZHSO Series
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Type EZH: Spring-to-close pilot-operated pressure
reducing regulator for low to high outlet pressure
Type EZHSO: Spring-to-open pilot-operated pressure
reducing regulator for low to high outlet pressure
Type EZHOSX: Type EZH with a Type OS2 slam-shut
device for overpressure (OPSO) or overpressure and
underpressure (OPSO/UPSO) protection
Type EZHSO-OSX: Type EZHSO with a
Type OS2 slam-shut device for overpressure
(OPSO) or overpressure and underpressure (OPSO/
UPSO) protection
Body Sizes, End Connection Styles and
Pressure Ratings(1)
See Table 1
Maximum Inlet and Outlet (Casing) Pressures(1)
1500 psig / 103 bar
Maximum Emergency (Design Casing Pressure)(1)
1500 psig / 103 bar
Maximum Operating Differential Pressure(1)(4)
Main Valve: 1500 psid / 103 bar d
Pilot: Between loading pressure in pilot and loading
sense pressure:SVLGEDUG
Outlet Pressure Ranges
See Table 2
Pressure Registration
External
Pilot Connections
1/4 NPT
Minimum Differential Pressures(1)(2)
SERIES MAIN VALVE
BODY SIZE
MINIMUM DIFFERENTIAL
For 90% Capacity For 100%
Capacity
NPS DN psid bar d psid bar d
EZH
125
250
380
4100
;
150, 200,
300 X 150 - - - - - - - -
EZHSO
125
55 55 250
380
4 100 - - - - - - - -
;
150, 200,
300 X 150 - - - - - - - -
Temperature Capabilities(1)
Nitrile (NBR) Version:WR)WR&
Fluorocarbon (FKM) Version: 0 to 180ºF /
-18 to 82ºC(3)
Polyurethane (PU) Version: NPS 1, 2, 6, 8 and
12 X 6 / DN 25, 50, 150, 200 and 300 X 150 Sizes:
-22 to 180ºF / -30 to 82ºC
NPS 3 to 4 / DN 80 to 100 Sizes:
-4 to 180ºF / -20 to 82ºC
Options
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Whisper Trim™ Cage
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Pilot Descriptions
The EZH and EZHSO Series pressure-reducing regulators
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Type PRX/1202XWOHWSUHVVXUHUDQJHRIWRSVLJ
WREDU7KH7\SH35;FDQEHXVHGDVWKHSLORW
on single stage pressure reducing regulators, as the monitor
or working pilot in wide-open monitor systems or as the
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Type PRX/120-AP: Outlet pressure range of 435 to
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be used as the pilot on single stage pressure reducing
regulators, as the monitor or working pilot in wide-open
monitor systems or as the working pilots in working
PRQLWRUV\VWHPV
Type PRX/125,GHQWLFDOWRWKH7\SH35;H[FHSW
WKHUHVWULFWLRQVFUHZLVUHPRYHG7KH7\SH35;FDQ
only be used as the monitor override pilot on working
PRQLWRUDSSOLFDWLRQV
Type PRX/125-AP,GHQWLFDOWRWKH7\SH35;$3H[FHSW
WKHUHVWULFWLRQVFUHZLVUHPRYHG7KH7\SH35;$3
can only be used as the monitor override pilot on working
PRQLWRUDSSOLFDWLRQV
Type PRX/131:6HWSUHVVXUHUDQJHRIWRSVLJ
WREDU7KH7\SH35;LVXVHGDVDERRVWHURU
quick dump pilot to increase main valve closing speed on a
single stage pressure reducing regulator or on the monitor
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Pilot Supply Filter Regulator
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constant supply pressure to the PRX Series pilot that
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2
EZH and EZHSO Series
Table 1. Main Valve Body Sizes, End Connection Styles and Body Ratings
MAIN VALVE BODY SIZE MAIN VALVE BODY MATERIAL END CONNECTION STYLE STRUCTURAL DESIGN RATING
NPS DN psig bar
1 and 2 25 and 50
LCC or WCC Steel
NPT or SWE 1500 103
;DQG
25, 50, 80, 100,
150, 300 X 150
and 200
CL150 RF
CL300 RF
&/5)RU%:( 1500 103
Table 2. Outlet Pressure Ranges
TYPE
OUTLET PRESSURE RANGE AC (ACCURACY CLASS) PILOT CONTROL SPRING INFORMATION
psig bar EZH Series EZHSO Series Spring Color Part Number Wire Diameter Free Length
In. cm In. cm
PRX/120
PRX/125
PRX/131
WR
23 to 44
41 to 80
WR
WR
WR
WR
WR
Yellow
Green
%OXH
%ODFN
0;
0;
0;
0;
WR
203 to 334
WR
WR
WR
WR
Silver
Gold
Aluminum
0;
0;
0;
PRX/120-AP
PRX/125-AP
PRX/131-AP WR WR Clear 0;
Table 3. Failure Mode Analysis
PART NAME CONDITION CAUSE EFFECT REGULATOR REACTION MODE
Type EZH Type EZHSO
Filter )LOWHU%ORFNHG&ORJJHG 'HEULVRUDURPDWLFV
present in the gas
'HFUHDVHRIVXSSO\
pressure gives decrease
of loading pressure Close Open
Pilot disk Pilot cannot
be closed 'HEULVRUDURPDWLFV
present, Sour gas ,QFUHDVH
loading pressure Open Open
Pilot
lower diaphragm Pilot cannot control 'HEULVRUDURPDWLFV
present, Sour gas 'HFUHDVH
loading pressure Close Open
Pilot
upper diaphragm Pilot cannot feed
the regulator 'HEULVRUDURPDWLFV
present, Sour gas 'HFUHDVH
loading pressure Close Open
Regulator diaphragm
Not proper performance
of
the Loading
Pressure Chamber
'HEULVRUDURPDWLFV
present, Sour gas
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and charge or discharge
of the loading pressure
chamber
Close Open
Pilot Frozen Pilot,
Type SA/2 working 0RLVWXUHLQWKHJDV
high-pressure drop
Type SA/2 loading upper
casing of regulator, Pilot
not supplying loading
pressure to
lower casing
Close Close
3
EZH and EZHSO Series
A
B
L
SM
V
R
TYPE PRX TYPE SA/2
V
RM
S
B
L
A
TYPE SA2
TYPE PRX
TYPE EZH
Figure 3. Type EZH (Spring-to-Close) Operational Schematic
INLET PRESSURE
LOADING PRESSURE
PILOT SUPPLY PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
TYPE PRX:
S - BLEED PORT
B - SUPPLY PORT
L - LOADING PORT
A - SENSING PORT
TYPE SA/2:
V - SENSING PORT
R - PILOT SUPPLY PORT
M - INLET PORT
(B
PILOT UPPER
DIAPHRAGM
PILOT DISK
PILOT CONTROL
SPRING
PILOT LOWER
DIAPHRAGM
REGULATOR
ACTUATOR
DIAPHRAGM
MAIN VALVE
DISK (PLUG)
FILTER
PILOT BLEED
RESTRICTION
CHECK VALVE
Figure 4. Type EZHSO (Spring-to-Open) Operational Schematic
TYPE PRX:
S - BLEED PORT
B - SUPPLY PORT
L - LOADING PORT
A - SENSING PORT
TYPE SA/2:
V - SENSING PORT
R - PILOT SUPPLY PORT
M - INLET PORT
0B
TYPE EZHSO
FILTER
PILOT DISK
PILOT LOWER
DIAPHRAGM
CHECK VALVE
PILOT BLEED
RESTRICTION
REGULATOR ACTUATOR
DIAPHRAGM
MAIN VALVE
DISK (PLUG)
INLET PRESSURE
LOADING PRESSURE
PILOT SUPPLY PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
4
EZH and EZHSO Series
Principle of Operation
EZH Series – Spring-to-Close Version
CAUTION
The pilot-operated EZH Series
(Spring-to-Close version) will fail in close
position with a main valve diaphragm failure
or lack of pressure supply to the pilot (see
Table 3 for Failure Mode Analysis).
EZH Series (Figure 3) uses inlet pressure, which is reduced
through pilot operation to load the regulator actuator
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pressure assists the main spring that tends to close the
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PRX Series pilot is supplied with pressure coming from
pre-regulator Type SA/2, which reduces inlet pressure to the
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When outlet pressure drops below the setting of the
pilot control spring, pilot control spring force on the pilot
diaphragm opens the pilot valve disk, providing additional
loading pressure to the lower chamber of the regulator
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lower chamber of the actuator diaphragm and pilot escapes
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When the gas demand in the downstream system has
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pressure increases over the setting of the pilot spring, the
pilot valve disk will be closed, reducing loading pressure to
the lower chamber of the regulator actuator diaphragm; the
pressure in the upper case and the main spring will force the
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the regulator actuator diaphragm and pilot bleeds to the
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$FKHFNYDOYHVHWDWSVLEDULVLQVWDOOHGEHWZHHQ
outlet pressure and loading pressure impulse lines; this valve
is designed to protect the main valve diaphragm assembly
from excessive differential pressure during startup if incorrect
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differential pressure between the outlet pressure and loading
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EZHSO Series – Spring-to-Open Version
CAUTION
The pilot-operated EZHSO Series (Spring-to-
Open version) will fail in open position with
a main valve diaphragm failure or lack of
pressure supply to the pilot (see Table 3 for
Failure Mode Analysis).
EZHSO Series (Figure 4) uses inlet pressure, which is
reduced through pilot operation to load the regulator
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is provided to the regulator actuator diaphragm (upper
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that tends to open the regulator, and opposes the loading
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PRX Series pilot is supplied with pressure coming from
pre-regulator Type SA/2, which reduces inlet pressure to the
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When outlet pressure drops below the setting of the
pilot control spring, pilot control spring force on the pilot
diaphragm opens the pilot valve disk, providing additional
loading pressure to the lower chamber of the regulator
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RSHQVWKHPDLQYDOYHGLVNVXSSO\LQJWKHUHTXLUHGÀRZWR
WKHGRZQVWUHDPV\VWHP$Q\H[FHVVORDGLQJSUHVVXUHLQ
the lower chamber of the regulator actuator diaphragm and
pilot escapes downstream through the bleed restriction in
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When the gas demand in the downstream system has
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pressure increases over the setting of the pilot spring, the
pilot valve disk will be closed, reducing loading pressure to
the lower chamber of the regulator actuator diaphragm; the
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The excess loading pressure acting under the regulator
actuator diaphragm and pilot bleeds to the downstream
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$FKHFNYDOYHVHWDWSVLEDULVLQVWDOOHGEHWZHHQ
pilot supply pressure and loading pressure impulse lines;
this valve is designed to protect the main valve diaphragm
assembly from excessive differential pressure during
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Monitoring Systems
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containment; therefore, there is no relief valve to vent to the
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pressure, a monitor regulator installed in series, sensing
the downstream pressure, goes into operation to maintain
the downstream pressure at a slightly higher than normal
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NHHSVWKHFXVWRPHURQOLQH$OVRWHVWLQJLVUHODWLYHO\HDV\
To perform a periodic test on a monitoring regulator, increase
the outlet set pressure of the working regulator and watch
the outlet pressure gauge to determine if the monitoring
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Wide-Open Monitoring System (Figure 5)
There are two types of wide-open monitoring systems:
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upstream and downstream monitoring is that the functions
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from upstream to downstream monitoring and vice-versa,
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5
EZH and EZHSO Series
The decision to use either an upstream or downstream
monitoring system is largely a matter of personal preference
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,QQRUPDORSHUDWLRQRIDZLGHRSHQFRQ¿JXUDWLRQWKH
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a higher outlet pressure setting, the monitor regulator senses
a pressure lower than its setpoint and tries to increase outlet
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the monitoring regulator assumes control and holds the
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Figure 5 shows an upstream wide-open monitor Type EZH
(failed-close) and a downstream active regulator
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Type EZHSO regulator no longer controls downstream
pressure, it will remain open, causing the Type EZH
monitor regulator to take control of the downstream
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will go closed and protect the downstream system from an
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Working Monitoring System (Figure 6)
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The additional pilot permits the monitoring regulator to act
as a series regulator to control an intermediate pressure
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pilot controls the intermediate pressure and the monitoring
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regulator fails, the monitoring pilot will sense the increase in
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Working monitor installations require an EZH or
EZHSO Series main valve with a Type PRX/120 or
PRX/120-AP working pilot and a Type PRX/125 or
PRX/125-AP monitoring pilot for the upstream
regulator and an EZH or EZHSO Series with the
appropriate Type PRX/120 or PRX/120-AP pilot for the
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Installation
!
WARNING
Personal injury or equipment damage, due
to bursting of pressure-containing parts may
result if this regulator is overpressured or
is installed where service conditions could
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section and on the appropriate nameplate
or where conditions exceed any rating of
the adjacent piping or piping connections.
To avoid such injury or damage, provide
pressure-relieving or pressure-limiting
devices to prevent service conditions
from exceeding those limits. Also, be sure
the installation is in compliance with all
applicable codes and regulations.
Additionally, physical damage to the
regulator could break the pilot off the
main valve, causing personal injury
and property damage due to bursting of
pressure-containing parts. To avoid such
injury and damage, install the regulator in a
safe location.
All Installations
An EZH or EZHSO Series regulator bleeds no gas to
atmosphere during normal operation, making it suitable
for installation in pits and other enclosed locations without
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LQVWDOOHGLQSLWVVXEMHFWWRÀRRGLQJE\YHQWLQJWKHSLORW
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experience should install, operate and maintain a
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GDPDJHWRRUGHEULVLQWKHUHJXODWRU$OVRPDNHVXUH
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CAUTION
Eyebolts are installed to aid in the handling
and installation of the Regulator Assembly
only. Always utilize both eyebolts and do not
attempt to lift more weight than the regulator
with these eyebolts.
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installed in any position, but it is normally installed in a
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Apply pipe compound to the external pipeline threads
before installing a regulator with threaded NPT end
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UHJXODWRUÀDQJHVZKHQLQVWDOOLQJDUHJXODWRUZLWK
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connections, remove trim before welding and make sure
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SURFHGXUHVZKHQLQVWDOOLQJWKHUHJXODWRU
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WARNING
A regulator may vent some gas to the
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gas service, vented gas may accumulate,
causing personal injury, death or property
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line(s) from the regulator pilot(s) to a remote,
safe location away from air intakes or any
hazardous location. The end of the vent line
or stack opening must be pointed down and
protected against condensation or clogging.
EZH and EZHSO Series
PRX Series pilots have a 1/4 NPT vent connection in the
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FORJJLQJ7RUHPRWHO\YHQWJDVIURPWKHVSULQJFDVH
UHPRYHWKHVFUHHQHGYHQWDQGFRQQHFWLQPP
SLSLQJRUWXELQJWRWKHVSULQJFDVHFRQQHFWLRQ7KH
piping or tubing should vent to a safe location, have as
few elbows as possible and have a screened vent that
SRLQWVGRZQRQLWVH[KDXVW,QVWDOOWKHUHJXODWRUDQGDQ\
remote vent piping or tubing so that the vent is pointed
down and protected from condensation, freezing or
VXEVWDQFHVWKDWPD\FORJLW
CAUTION
To avoid freeze-up because of pressure drop
and moisture in the gas, use anti-freeze
practices, such as heating the supply gas or
adding a de-icing agent to the supply gas.
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WKH136WR'1WR(=+6HULHVFRQQHFWD
downstream control (sense) line from the “A” port on
the bottom of the PRX Series pilot to a straight run of
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Figure 5. Wide-Open Monitoring System Operational Schematics
0B
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larger sizes, connect the downstream control line from
the port on the upper casing to a straight run of pipe
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LQFKPPRUODUJHUSLSLQJ,IVXFKDGLVWDQFHLV
not practical, connect the control line away from elbows,
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Note
The optimal location for the sense and
bleed lines is between the regulator and the
downstream block valve. To prevent damage
to the pilot during startup, the sense and
bleed lines should be located on the same
side of the downstream block valve.
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Connect a downstream bleed line from the “S” port
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10 pipe diameters to the regulator outlet as shown in
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GLDPHWHUWXELQJ
Note
Separate sensing lines must be used for the
“S” and the “A” ports.
V
RMS
B
L
A
V
R
M
S
B
L
A
TYPE SA/2
TYPE PRX
TYPE SA/2
TYPE PRX
TYPE EZH TYPE EZHO
V
RMS
B
L
A
V
R
M
S
B
L
A
TYPE SA/2
TYPE PRX
TYPE SA/2
TYPE PRX
TYPE EZH TYPE EZHO
CHECK VALVE CHECK
VALVE
TYPE PRX
S - BLEED PORT
B - SUPPLY PORT
L - LOADING PORT
A - SENSING PORT
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
INTERMEDIATE PRESSURE
PILOT SUPPLY PRESSURE
LOADING PRESSURE TYPE SA/2:
V - SENSING PORT
R - PILOT SUPPLY PORT
M - INLET PORT
EZH and EZHSO Series
CAUTION
To prevent damage to the pilot during
Startup, the sense and bleed lines should be
located on the same side of the downstream
block valve.
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OLQHVLIGHVLUHG,IKDQGYDOYHVDUHLQVWDOOHGWKH\VKRXOG
EHIXOOÀRZYDOYHVVXFKDVDIXOOSRUWEDOOYDOYH)RU
EZHSO Series installation, a vent valve downstream of
WKHUHJXODWRULVQHHGHG,WVKRXOGEHLQVWDOOHGGLUHFWO\
in the PRX Series pilot bleed line connection (line from
3RUW6WRSLSH$IXOOERUH136EDOOYDOYHIRUWKH
YHQWOLQHLVSUHIHUUHGWRSURYLGHVXI¿FLHQWÀRZ
For optional remote pneumatic loading of a
PRX Series pilot, make the spring case piping
connections just as they would be made for remote
YHQWLQJLQVWHS
Wide-Open Monitor Regulator
CAUTION
The working regulator must be rated for
the maximum allowable operating pressure
of the system because this will be its inlet
pressure if the monitoring regulator fails.
Also, the outlet pressure rating of the
monitoring pilot and any other components
that are exposed to the intermediate pressure
must be rated for full inlet pressure.
)ROORZWKHSURFHGXUHVLQWKH$OO,QVWDOODWLRQVVHFWLRQDQG
WKHQFRQWLQXHZLWKVWHSRIWKLVVHFWLRQ7KHVHQVHDQG
bleed control lines of both the upstream and downstream
pilots will be connected to the downstream piping (see
)LJXUH
Connect the pilot supply line for the downstream
regulator to the outlet “R” port of the Type SA/2 pilot
VXSSO\¿OWHUUHJXODWRU
Working Monitor Regulator
)ROORZWKHSURFHGXUHLQWKH$OO,QVWDOODWLRQVVHFWLRQDQG
WKHQFRQWLQXHZLWKVWHSRIWKLVVHFWLRQ7KHVHQVH
line of the upstream monitor pilot (from Port A on the
Type PRX/125) and the bleed (Port S) and sense lines
(Port A) of the downstream pilot will be connected to the
GRZQVWUHDPSLSLQJVHH)LJXUH
Connect an inlet supply line from the upstream piping
WRWKHLQOHW³0´SRUWRIWKHGRZQVWUHDP7\SH6$SLORW
VXSSO\¿OWHUUHJXODWRU
Connect a control (sense) line from the “A” port of
the upstream working Type PRX/120 pilot to the
LQWHUPHGLDWHSUHVVXUHSRUWLRQRISLSLQJXVLQJLQ
PPRUODUJHURXWVLGHGLDPHWHUWXELQJ
Connect a downstream bleed line from the “S” port
of the upstream working Type PRX/120 pilot to the
LQWHUPHGLDWHSUHVVXUHSRUWLRQRISLSLQJXVLQJLQ
PPRUODUJHURXWVLGHGLDPHWHUWXELQJ
Figure 6. Working Monitoring System Operational Schematics
(B
TYPE PRX
S - BLEED PORT
B - SUPPLY PORT
L - LOADING PORT
A - SENSING PORT
TYPE SA/2:
V - SENSING PORT
R - PILOT SUPPLY PORT
M - INLET PORT
V
RM
SS
BB
LL
AA
TYPE SA/2
TYPE PRX/120 TYPE PRX/125
V
R
M
S
B
L
A
TYPE SA/2
TYPE PRX/120
TYPE EZH TYPE EZH
CHECK
VALVE
CHECK
VALVE
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
INTERMEDIATE PRESSURE
PILOT SUPPLY PRESSURE
LOADING PRESSURE
8
EZH and EZHSO Series
Startup and Adjustment
Pre-startup Considerations
(DFKUHJXODWRULVIDFWRU\VHWIRUWKHRXWOHWSUHVVXUHVSHFL¿HG
RQWKHRUGHU,IQRVHWWLQJZDVVSHFL¿HGRXWOHWSUHVVXUHZDV
IDFWRU\VHWDWWKHPLGUDQJHRIWKHSLORWFRQWUROVSULQJ%HIRUH
beginning the start-up procedure in this section, make sure
the following conditions are in effect:
%ORFNYDOYHVLVRODWHWKHUHJXODWRU
Vent valves are closed
A bypass, if any, is in operation
,QDOOFDVHVFKHFNWKHSLORWFRQWUROVSULQJVHWWLQJWRPDNH
VXUHLWLVFRUUHFWIRUWKHDSSOLFDWLRQ
CAUTION
Be sure to slowly introduce pressure into the
system to prevent downstream overpressure
due to potential rapid pressure increase.
Pressure gauges should always be used
to monitor downstream pressure during
Startup. Procedures used in putting this
regulator into operation must be planned
accordingly if the downstream system is
pressurized by another regulator or by a
manual bypass.
Note
:KHQXVLQJD7\SH6$SLORWVXSSO\¿OWHU
regulator, the differential pressure across
the main regulator must be at least 45 psid /
3.1 bar d for optimum regulator performance.
The Type SA/2 can be removed if differential
pressure across the main regulator is less
than 45 psid / 3.1 bar d and inlet pressure
stays at or below 200 psig / 13.8 bar.
Pilot Adjustment
The adjustment of the regulators is performed by means of
the pilot adjustment screw, which varies the compression
RIWKHFRQWUROVSULQJ$GMXVWPHQWLVSHUIRUPHGZKLOHWKH
regulator is in operation with the aid of a pressure gauge
WRPRQLWRUGRZQVWUHDPSUHVVXUH7KHVKXWRIIYDOYH
downstream of the regulator must not be completely
closed, as it is necessary that a small quantity of gas
ÀRZVGRZQVWUHDPWRDOORZWKHRXWOHWVLGHWRYHQWZKHQLW
LVQHFHVVDU\WRORZHUWKHSUHVVXUH)RU35;6HULHVSLORWV
(Figure 13), loosen locknut (key 2) and turn the adjusting
screw into the spring case (clockwise) to increase and
out of the spring case (counterclockwise) to decrease the
GRZQVWUHDPSUHVVXUH:KHQWKHGHVLUHGVHWSRLQWDGMXVWPHQW
LVFRPSOHWHGDQGYHUL¿HGWLJKWHQWKHORFNQXWWRORFNWKH
DGMXVWLQJVFUHZLQSRVLWLRQ1RDGMXVWPHQWLVQHHGHGWRWKH
7\SH6$SLORWVXSSO\¿OWHUUHJXODWRU
$GMXVWLQJWKHPRQLWRUUHJXODWRU)LJXUHLVWKHVDPHDV
DGMXVWLQJWKHPDLQUHJXODWRU0RQLWRUVHWSRLQWVDUHVHW
VOLJKWO\KLJKHUWKDQWKHPDLQUHJXODWRU7KHPRQLWRUSUHVVXUH
setting should be adjusted so it is at minimum two times the
pilot accuracy band pressure above the working regulator
SUHVVXUHVHWWLQJ
PRX Series Pilot Restrictor and Damper
Screw Adjustment
Note
The Type PRX/125 (upstream monitor pilot in
working monitor installations) does not have
a restrictor screw.
7KH'DPSHUDQG5HVWULFWRUVFUHZVRQWKH35;6HULHV
pilot control the regulator’s proportional band (droop) and
VSHHGRIUHVSRQVH7RWXQHIROORZWKHVWHSVRXWOLQHGEHORZ
UHIHUHQFLQJ)LJXUH
Start with the restrictor screw (R) 1 turn
counterclockwise from fully seated (turn restrictor fully
clockwise then 1 turn counterclockwise) and the damper
VFUHZ'IXOO\FRXQWHUFORFNZLVH
Turn damper screw clockwise until desired performance
LVDFKLHYHG7KLVUHGXFHVWKHÀRZSDWKRIWKHGDPSHU
,IWKHGDPSHUEHFRPHVIXOO\VHDWHGQRORQJHUDEOHWR
turn clockwise) and the desired performance has not
been achieved, return the damper screw to the fully
FRXQWHUFORFNZLVHSRVLWLRQ
!
WARNING
The damper screw should not be left in
the fully seated position, as it will lock the
regulator in last position which could cause
incorrect pressure regulation.
Turn the restrictor screw an additional turn
FRXQWHUFORFNZLVHIURPIXOO\VHDWHG7KLVLQFUHDVHV
WKHÀRZSDWKRIWKHUHVWULFWRU,IDGGLWLRQDOWXQLQJLV
UHTXLUHGUHSHDWVWHS)ROORZWKLVPHWKRGXQWLOGHVLUHG
SHUIRUPDQFHLVDFKLHYHG
Startup
0DNHVXUHDOOEORFNYDOYHVYHQWYDOYHVDQG
FRQWUROOLQHYDOYHVDUHFORVHG
%DFNRXWWKHSLORWDGMXVWLQJVFUHZV
,QWURGXFHXSVWUHDPSUHVVXUHE\VORZO\RSHQLQJ
LQOHWYDOYH
4. EZHSO Series Monitor Installations and all
EZH Series Installations: Crack open the outlet block
YDOYHRUE\SDVVYDOYHWRDOORZPLQLPXPÀRZ
For EZHSO Series Single Regulator Installation:
Vent pressure from bleed line until regulator closes and
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EZH and EZHSO Series
YHQWOLQHLVSUHIHUUHG6ORZO\RSHQGRZQVWUHDPYDOYH
PDNLQJVXUHWKDWWKHUHLVDFRQVWDQWVXI¿FLHQWSUHVVXUH
GURSDFURVVWKHUHJXODWRU,IGRZQVWUHDPSUHVVXUH
FOLPEVWRRFORVHWRXSVWUHDPSUHVVXUHDPLQLPXP'3
RISVLEDUPXVWEHJXDUDQWHHGWKHUHJXODWRU
ZLOODJDLQIXOO\RSHQ,QWKLVFDVHVWDUWXSSURFHGXUH
QHHGVWREHUHSHDWHG
For a single regulator (Figure 3), set the pilot to
the desired outlet (control) pressure according to the
3LORW$GMXVWPHQWSURFHGXUH
For a wide-open downstream monitor installation
(Figure 5), adjust the upstream working pilot until
intermediate pressure is higher than the desired setpoint
RIWKHPRQLWRUSLORW$GMXVWWKHGRZQVWUHDPPRQLWRULQJSLORW
WRWKHGHVLUHGPRQLWRULQJWDNHRYHUSUHVVXUH5HGXFHWKH
XSVWUHDPSLORWWRWKHQRUPDORXWOHWSUHVVXUHVHWWLQJ
For a wide-open upstream monitor installation
(Figure 5), adjust the downstream working pilot to a setpoint
KLJKHUWKDQWKHVHWSRLQWRIWKHPRQLWRUSLORW$GMXVWWKH
upstream monitoring pilot to the desired monitoring takeover
SUHVVXUH5HGXFHWKHGRZQVWUHDPSLORWWRWKHQRUPDORXWOHW
SUHVVXUHVHWWLQJ
For a working monitor installation (Figure 6), turn out the
adjusting screw of the downstream pilot, removing spring
WHQVLRQ$GMXVWWKHXSVWUHDPZRUNLQJSLORWWRWKHGHVLUHG
LQWHUPHGLDWHSUHVVXUHVHWWLQJ7XUQRXWWKHDGMXVWLQJVFUHZ
of the upstream monitor pilot (Type PRX/125), removing
WHQVLRQ7XUQLQWKHDGMXVWLQJVFUHZRIWKHGRZQVWUHDPSLORW
$GMXVWWKHXSVWUHDPPRQLWRUSLORWWRWKHGHVLUHGVHWSRLQW
(VWDEOLVK¿QDOGHVLUHGGRZQVWUHDPSUHVVXUHE\DGMXVWLQJWKH
GRZQVWUHDPSLORW
After adjusting the PRX Series pilot(s) to the desired
pressure setting(s), slowly open the downstream block
YDOYHZLGHRSHQ
&ORVHWKHE\SDVVYDOYHLIXVHG
Shutdown
CAUTION
If the pilot bleed control line pressure is
VKXWGRZQ¿UVWWKHGRZQVWUHDPV\VWHPPD\
be subjected to full inlet pressure.
,IWKHSLORWVHWWLQJPXVWEHFKDQJHGEHVXUHWRNHHS
VRPHWHQVLRQRQWKHVSULQJ7KLVZLOOSUHYHQWWUDSSLQJLQOHW
SUHVVXUHGXULQJEORZGRZQ
Slowly close the valves in the following order:
D ,QOHWEORFNYDOYH
E 2XWOHWEORFNYDOYH
F &RQWUROOLQHYDOYHVLIXVHG
2SHQWKHYHQWYDOYHVWRGHSUHVVXUL]HWKHV\VWHP
Maintenance
The regulator parts are subject to normal wear and must
EHLQVSHFWHGSHULRGLFDOO\DQGUHSODFHGDVQHFHVVDU\
The frequency of inspection and replacement depends
on the severity of service conditions and on applicable
IHGHUDOVWDWHDQGORFDOFRGHVDQGUHJXODWLRQVUse Torque
6SHFL¿FDWLRQV7DEOHIRUSURSHUWRUTXHYDOXHV
!
WARNING
To avoid personal injury or property
damage from sudden release of pressure,
isolate the regulator from the pressure
system and release all pressure from the
pilot and main valve before performing
maintenance operations.
Use proper lifting techniques, when lifting
the upper and lower actuator casings
(keys 11 and 5) off the EZH or EZHSO Series
body (key 1). The actuator assembly weighs
more than 100 lbs / 45 kg.
CAUTION
Customer cannot use another type of eyebolt
in the regulator. Only Emerson parts can be
used to repair the unit.
Eyebolts are installed to aid in the handling
and installation of the Regulator Assembly
only. Do not attempt to lift more weight than
the regulator with these eyebolts.
Polyurethane (PU) Disk Conversion
To convert EZH and EZHSO Series units to a
3RO\XUHWKDQH38GLVNIURPD1LWULOH1%5RU
)OXRURFDUERQ).0GLVNWKHXVHUZLOOQHHGWRRUGHUWKUHH
parts; retainer (key 31), disk assembly (key 30) and seat
ULQJNH\)RUWKH136'17\SH(=+62WKH
3RO\XUHWKDQH38VOHHYHDVVHPEO\LVDOVRUHTXLUHG3OHDVH
FRQWDFW\RXUORFDO6DOHV2I¿FHZLWKDQ\TXHVWLRQVDERXW
SDUWVVHOHFWLRQ
Main Valve and Actuator Maintenance
Disk Maintenance
NPS 1 through 3 / DN 25 through 80
(Refer to Figures 8 and 9)
5HPRYHQXWVNH\
Carefully lift the upper actuator casing and lower
actuator casing assembly (keys 11 and 5) off the
ERG\NH\
For EZH Series: Remove the hex socket cap screws
NH\DQGORFNZDVKHUVNH\/LIWRIIWKHGLVN
10
EZH and EZHSO Series
KROGHUDVVHPEO\NH\DQGGLVNUHWDLQHUNH\
For EZHSO Series: Remove the hex socket cap
VFUHZNH\/LIWRIIWKHGLVNKROGHUDVVHPEO\
NH\'RQRWDWWHPSWWRUHPRYHWKHVOHHYH
DGDSWRUNH\
5HPRYHWKH2ULQJNH\,QVSHFWWKH2ULQJ
IRUGDPDJHRUZHDUDQGUHSODFHLIQHFHVVDU\
Lightly lubricate O-ring before placing in the sleeve
DGDSWRUNH\
Remove the cage (key 3), seat ring (key 2) and O-ring
NH\,QVSHFWWKH2ULQJIRUGDPDJHRUZHDUDQG
UHSODFHLIQHFHVVDU\/LJKWO\OXEULFDWH2ULQJEHIRUH
SODFLQJLQWKHERG\NH\
Set the seat ring (key 2) back in the body (key 1) with
WKHFXUYHGVLGHGRZQDQGWKHVHDWHGJHXS3ODFHWKH
FDJHNH\RQWRSRIVHDWULQJ7KHFDJHZLOOHQJDJH
WKHVWHSRQWKHVHDWULQJ
Place the disk holder assembly (key 30) and disk
UHWDLQHUNH\RQWKHVOHHYHDGDSWRUNH\
For EZH Series:,QVHUWWKHORFNZDVKHUVNH\
DQGKH[VRFNHWFDSVFUHZVNH\DQGWLJKWHQ
For EZHSO Series:,QVHUWWKHKH[VRFNHWFDSVFUHZ
NH\DQGWLJKWHQ
Carefully lift the upper actuator casing and lower actuator
casing assembly (keys 11 and 5) and place on the body
NH\6HFXUHZLWKVWXGEROWVDQGQXWVNH\VDQG
Disk Maintenance
NPS 4, 6, 8, 12 X 6 / DN 100, 150, 200 and
300 X 150 (Refer to Figures 8 and 9)
,ISUHVHQWUHPRYHWUDYHOLQGLFDWRUDVVHPEO\E\
XQVFUHZLQJWKHWUDYHOLQGLFDWRU¿WWLQJNH\WKHQSXOO
RXWWKHVWHPNH\3OHDVHVHHWKH7UDYHO,QGLFDWRU
0DLQWHQDQFHVHFWLRQIRUWKHSURSHUPDLQWHQDQFH
SURFHGXUHFor EZHSO Series: Remove closing cap
NH\XQVFUHZQXWVNH\DQGUHPRYH
ZDVKHUNH\
5HPRYHFDSVFUHZVNH\
&DUHIXOO\OLIWWKHFDSNH\RIIRIWKHXSSHUDFWXDWRU
FDVLQJNH\
5HPRYH2ULQJNH\,QVSHFWWKH2ULQJIRUGDPDJH
RUZHDUDQGUHSODFHLIQHFHVVDU\
5HPRYHWKH2ULQJNH\,QVSHFWWKH2ULQJIRU
GDPDJHRUZHDUDQGUHSODFHLIQHFHVVDU\/XEULFDWH
2ULQJEHIRUHSODFLQJLQVLGHWKHFDSNH\
/RRVHQFDSWXUHGVFUHZVNH\XQWLOIUHHWRVSLQ
For EZH Series: Fit eyebolt (key 35) into the upper
VSULQJVHDWNH\WKUHDGHGKROH
Carefully remove the sleeve assembly from the sleeve
JXLGHNH\XVLQJWKHH\HEROWNH\
Note
The sleeve assembly may be oriented
upside down for ease of maintenance, but
care should be taken not to drop small
components into the sleeve assembly.
Remove socket head cap screws (key 33) and lock
washers (key 32 on EZH Series and key 154 on
(=+626HULHV
For EZH Series: Lift off the disk retainer (key 31) and
GLVNKROGHUDVVHPEO\NH\For EZHSO Series: Lift
RIIWKHGLVNKROGHUDVVHPEO\NH\
5HPRYHWKH2ULQJNH\,QVSHFWWKH2ULQJ
IRUGDPDJHRUZHDUDQGUHSODFHLIQHFHVVDU\
Lightly lubricate O-ring before placing in the sleeve
DGDSWRUNH\
For EZH Series: Place disk holder assembly (key 30)
RQWRGLVNUHWDLQHUNH\3ODFHGLVNUHWDLQHU
(key 31) with the disk holder assembly (key 30)
LQWRVOHHYHDGDSWRUNH\DQGDOLJQVFUHZKROHV
For EZHSO Series: Place disk holder assembly
NH\LQWRVOHHYHDGDSWRUNH\DQGDOLJQ
VFUHZKROHV
3ODFHORFNZDVKHUNH\RQWRWKHVFUHZVNH\
For EZH Series: Screw together the disk retainer
DVVHPEO\LQWRWKHVOHHYHDGDSWRUNH\
For EZHSO Series: Place on socket head cap screw
NH\6FUHZWRJHWKHUWKHGLVNKROGHUDVVHPEO\
NH\LQWRWKHVOHHYHDGDSWRUNH\
/XEULFDWHWKHVOHHYHNH\
Carefully insert the sleeve assembly into the sleeve
JXLGHNH\XWLOL]LQJH\HEROWNH\$OLJQVOHHYH
XWLOL]LQJWKHVRFNHWKH[FDSVFUHZNH\DVDJXLGH
Note
The O-rings (key 9) may need to be removed
and stretched by hand in order for the sleeve
assembly to have sufficient clearance to
slide back into the sleeve guide.
6FUHZFDSWXUHGVFUHZVNH\WRDI¿[WKHVOHHYH
V\VWHP3ODFH2ULQJNH\RQFDSNH\
Remove eyebolt (key 35) from upper spring seat
NH\WKUHDGHGKROH
&DUHIXOO\SODFHWKHFDSNH\RQWKHXSSHUDFWXDWRU
FDVLQJNH\
/XEULFDWHFDSVFUHZVNH\DQGDWWDFKFDSNH\
WRWKHXSSHUFDVLQJXVLQJFDSVFUHZVNH\
Note
Rotate the cap such that the outer holes for
sensing lines are in line with upper casing
holes for sensing lines: to validate the
alignment and before attaching cap, check
that travel indicator is aligned on the cap and
on the upper actuator casing.
11
EZH and EZHSO Series
Table 4.7RUTXH6SHFL¿FDWLRQV
PART NAME
TORQUE SPECIFICATIONS AND TOOL RECOMMENDATIONS
Body Size
NPS 1 / DN 25 NPS 2 / DN 50 NPS 3 / DN 80 NPS 4 / DN 100 NPS 6, 8, and 12 X 6 /
DN 150, 200 and 300 X 150
Hex Head Cap Screw
NH\
Tool Size LQRUPP LQRUPP LQRUPP LQRUPP mm Allen
Torque ft-lbs WR WR WR 140 to 155 WR
1mWR WR WR WR WR
Allen Head Screw
NH\
Tool Size 4 mm 5 mm 5 mm PP PP
Torque ft-lbs WR WR WR WR WR
1mWR WR WR 11 to 13 WR
Hex Head Cap Screw
NH\VDQG
Tool Size PP 24 mm 32 mm 41 mm 41 mm
Torque ft-lbs 50 to 55 130 to 150 WR 280 to 310 WR
1mWR WR WR 380 to 420 WR
6WXG%ROWV
(key 24)
Tool Size LQ LQ LQ - - - - - - - -
Torque ft-lbs WR WR 100 to 120 - - - - 221 to 244
1mWR WR WR - - - - WR
Hex Head Nut
NH\
Tool Size LQRUPP LQRUPP LQRUPP - - - - 30 mm
Torque ft-lbs 45 to 50 45 to 50 WR - - - - WR
1mWR WR WR - - - - WR
Allen Head Screw
(key 33)
Tool Size 3 mm 4 mm 5 mm 5 mm 5 mm
Torque ft-lbs WR WR WR WR WR
1mWR WR WR WR WR
Allen Screws
NH\VDQG
Tool Size - - - - - - - - - - - - 4 mm 4 mm
Torque ft-lbs - - - - - - - - - - - - 3 3
1m- - - - - - - - - - - - 4 4
Hex Head Cap Screw
NH\
Tool Size - - - - - - - - - - - - 20 mm 30 mm
Torque ft-lbs - - - - - - - - - - - - WR 221 to 244
1m- - - - - - - - - - - - WR WR
Hex Head Nut
(key 151)
Tool Size PP PP PP PP 24 mm
Torque ft-lbs 32 32 45 45 45
1m43 43
Hex Head Nut
(key 152)
Tool Size - - - - PP PP PP 24 mm
Torque ft-lbs - - - - 40 45 to 50 45 to 50
1m- - - - 54 81 WR WR
Hex Head Cap Screw
(key 154)
Tool Size 3 mm 5 mm PP 3 mm - - - -
Torque ft-lbs 10 - - - -
1m 14 - - - -
Hex Head Nut
(key 155)
Tool Size PP - - - - - - - - - - - - - - - -
Torque ft-lbs 30 - - - - - - - - - - - - - - - -
1m41 - - - - - - - - - - - - - - - -
0RXQW2ULQJNH\RQWKHVSDFHEHWZHHQWKHFDS
NH\DQGWKHXSSHUDFWXDWRUFDVLQJNH\
6FUHZWKHH\HEROWVNH\RQWKHFDSNH\
For EZHSO Series:3ODFHWKHZDVKHUNH\RQ
WKHVWHPNH\$VVHPEOHRQHQXWNH\WRWKH
VWHPNH\XQWLOWKHVSHFL¿HGWRUTXHLVDFKLHYHGDQG
then install another nut (key 151) to lock the position of
VWHP6FUHZRQWKHFORVLQJFDSNH\0RXQW2ULQJ
NH\RQWKHFDSNH\
,ISUHVHQWVHWWKHVWHPNH\WKURXJKWKHFDVLQJ
hole and tap it into the groove in the diaphragm plate
NH\6OLGHWKHWUDYHOLQGLFDWRU¿WWLQJNH\RYHU
WKHVWHPDQGWLJKWHQWRWKHFDSNH\
Intermediate Flange O-ring Maintenance
NPS 1, 2, 3, 6, 8 and 12 X 6 / DN 25, 50,
80, 150, 200 and 300 X 150
5HPRYHQXWVNH\
Carefully lift the upper actuator casing and lower
actuator casing assemblies (keys 11 and 5) off the
ERG\NH\
5HPRYHFDSVFUHZVNH\
/LIWRIILQWHUPHGLDWHÀDQJHNH\
5HPRYH2ULQJNH\,QVSHFWWKH2ULQJIRUGDPDJH
RUZHDUDQGUHSODFHLIQHFHVVDU\/LJKWO\OXEULFDWH2ULQJ
EHIRUHSODFLQJLQWKHERG\NH\
3ODFHWKHLQWHUPHGLDWHÀDQJHNH\RQWKHERG\
make sure to position the stud bolt (key 24) holes
RQWKHRXWVLGHVRIWKHERG\NH\6HFXUHZLWKFDS
VFUHZVNH\
- - - -
12
EZH and EZHSO Series
Carefully lift the upper actuator casing and lower
actuator casing assemblies (keys 11 and 5) and position
LWLQWKHERG\NH\
6FUHZLQVWXGEROWVDQGQXWVNH\VDQG
Actuator Assembly Maintenance
NPS 1 through 3 / DN 25 through 80
(Refer to Figures 8 and 9)
0DNHDPDUNRQWKHXSSHUDFWXDWRUFDVLQJNH\
ORZHUDFWXDWRUFDVLQJNH\LQWHUPHGLDWHÀDQJH
NH\DQGERG\NH\WRLQGLFDWHSURSHUDOLJQPHQW
5HPRYHWUDYHOLQGLFDWRUDVVHPEO\NH\V
$RU%DQGLI
SUHVHQWE\ORRVHQLQJWKHWUDYHOLQGLFDWRU¿WWLQJNH\
DQGOLIWLQJRXWWKHWUDYHOLQGLFDWRUDVVHPEO\6HHWKH
7UDYHO,QGLFDWRU0DLQWHQDQFHVHFWLRQIRUWKHSURSHU
PDLQWHQDQFHSURFHGXUH
For EZH Series: Loosen out the hex nuts (key 23)
and remove the washers (key 22) and the cap screws
NH\5HPRYHDOOWKHVKRUWEROWV¿UVWWKHQHYHQO\
UHPRYHWKHWZRORQJEROWVNH\LQGLFDWHGZLWK
/%RQWKHKHDGDQGEUDFNHWVNH\0DNHVXUHWR
balance the upper actuator casing while removing the
VSULQJWHQVLRQ&DUHIXOO\OLIWWKHXSSHUDFWXDWRUFDVLQJ
NH\RIIWKHORZHUDFWXDWRUFDVLQJNH\5HPRYH
VSULQJNH\For EZHSO Series: Remove protective
FDSNH\/RRVHQDQGUHPRYHKH[QXWVNH\
DQGZDVKHUNH\5HPRYHFDSVFUHZVNH\
ZDVKHUVNH\DQGKH[QXWVNH\&DUHIXOO\OLIW
the upper actuator casing (key 11) off the lower actuator
FDVLQJNH\
5HPRYHWKHVRFNHWKHDGFDSVFUHZVNH\/LIWRII
WKHGLDSKUDJPNH\DQGWKHLQOHWSODWHNH\
5HPRYH2ULQJVNH\VDQG,QVSHFWWKH
diaphragm and O-rings for damage or wear and replace
LIQHFHVVDU\
,QVSHFWWKHXSSHUDFWXDWRUFDVLQJNH\2ULQJ
NH\DQWLIULFWLRQVSOLWULQJVNH\DQGDQWLIULFWLRQ
ULQJNH\IRUGDPDJHRUZHDU,IGDPDJHGUHPRYHWKH
2ULQJDQGVSOLWULQJVDQGUHSODFHZLWKQHZSDUWV/LJKWO\
OXEULFDWHWKH2ULQJDQGVSOLWULQJV3ODFHWKHVSOLWULQJV
LQWKHERG\¿UVWWKHQVOLGHWKH2ULQJEHWZHHQWKHVSOLW
ULQJV/XEULFDWHDQGUHLQVWDOOWKHDQWLIULFWLRQULQJNH\
5HPRYHKH[QXWVNH\IURPWKHVWXGEROWV
NH\/LIWRIIWKHORZHUDFWXDWRUFDVLQJNH\
For EZH Series: Remove the hex socket cap screws
NH\DQGVSULQJORFNZDVKHUVNH\/LIWRII
the disk holder assembly (key 30) and disk retainer
NH\For EZHSO Series: Remove the hex
VRFNHWFDSVFUHZNH\/LIWRIIWKHGLVNKROGHU
DVVHPEO\NH\
Slide the sleeve (key 14) out of the lower actuator
FDVLQJNH\DQGVOLGHWKHRXWOHWSODWHNH\RIIRI
WKHVOHHYH&KHFNWKHVOHHYHIRUVFUDWFKHVEXUUVRU
RWKHUGDPDJHDQGUHSODFHLIQHFHVVDU\
,QVSHFWWKHORZHUDFWXDWRUFDVLQJNH\2ULQJV
NH\VDQGDQWLIULFWLRQVSOLWULQJVNH\DQG
DQWLIULFWLRQULQJNH\IRUGDPDJHRUZHDU,IGDPDJHG
remove the O-ring and split rings and replace with
QHZSDUWV/LJKWO\OXEULFDWHWKH2ULQJNH\DQGVSOLW
ULQJV3ODFHWKHVSOLWULQJVLQWKHERG\¿UVWWKHQVOLGH
WKH2ULQJNH\EHWZHHQWKHVSOLWULQJV/XEULFDWH
DQGPRXQW2ULQJNH\RXWVLGHRIWKHORZHUDFWXDWRU
FDVLQJNH\
6OLGHWKHRXWOHWSODWHNH\RQWRWKHVOHHYHNH\
and slide the sleeve into the lower actuator casing
NH\For EZH Series: Place the disk holder (key 30)
and disk retainer (key 31) on the sleeve adaptor
NH\,QVHUWWKHVSULQJORFNZDVKHUVNH\
DQGKH[VRFNHWFDSVFUHZVNH\DQGWLJKWHQ
For EZHSO Series: Place the disk holder assembly
NH\RQWKHVOHHYHDGDSWRUNH\,QVHUWWKHKH[
VRFNHWFDSVFUHZNH\DQGWLJKWHQ
/LJKWO\OXEULFDWHWKH2ULQJVNH\VDQGDQGWKH
LQQHUDQGRXWHUGLDSKUDJPNH\HGJHV3ODFHWKH
inlet plate (key 18) and the diaphragm (key 20) on the
VOHHYHNH\0DNHVXUH2ULQJVNH\VDQGDUH
FRUUHFWO\SRVLWLRQHG,QVHUWDQGWLJKWHQWKHKH[VRFNHW
FDSVFUHZVNH\
Note
When tightening fasteners arranged in a
circular pattern, alternate the tightening
of each fastener with the fastener directly
across from it using a “star” criss-cross
SDWWHUQIRU¿YHWLPHVXQWLOSURSHUVSHFL¿HG
torque is achieved. Each time around, when
all screws are tightened to the required
torque, the diaphragm will compress a little
until the plates are in direct, metal-to-metal,
FRQWDFW,WZLOOWDNHDWOHDVW¿YHWLPHVDURXQG
before this happens. Only then will the
applied torque on each screw remain at the
required value.
Carefully lift the lower actuator casing assembly (key 5)
DQGSODFHRQWKHERG\NH\Make sure to match up
the alignment marks. Secure with stud bolts and nuts
NH\VDQG
For EZH Series: Lightly lubricate the spring (key 13)
DQGSODFHRQWKHLQOHWSODWHNH\
Carefully place the upper actuator casing (key 11)
RQWKHORZHUDFWXDWRUFDVLQJNH\Make sure to
match up the alignment marks.,QVHUWWKHWZRORQJ
EROWVNH\DSDUWDQGDZD\IURPÀDQJHV3ODFH
the washers (key 22), hex nuts (key 23) and brackets
NH\RQWKHORQJEROWVDQGHYHQO\WLJKWHQ8VLQJ
proper bolting techniques, install remaining short bolts
NH\ZDVKHUVDQGKH[QXWV
For EZHSO Series:,QVWDOOZDVKHUNH\WLJKWHQ
KH[QXWVNH\DQGLQVWDOOSURWHFWLYHFDSNH\
Place travel indicator assembly (keys 138, 140,
$RU%DQGLQWKH
upper actuator casing (key 11), if present and tighten the
WUDYHOLQGLFDWRU¿WWLQJNH\
13
EZH and EZHSO Series
Actuator Assembly Maintenance
NPS 4, 6, 8, 12 X 6 / DN 100, 150,
200, 300 X 150 (Refer to Figures 8 and 9)
,ISUHVHQWUHPRYHWKHWUDYHOLQGLFDWRUDVVHPEO\
E\XQVFUHZLQJWKHWUDYHOLQGLFDWRU¿WWLQJNH\
WKHQSXOORXWWKHVWHPNH\3OHDVHVHHWKH
7UDYHO,QGLFDWRU0DLQWHQDQFHVHFWLRQIRUWKHSURSHU
PDLQWHQDQFHSURFHGXUHFor EZHSO Series: Remove
FORVLQJFDSNH\XQVFUHZQXWVNH\DQG
ZDVKHUNH\
Remove hex head cap screws (key 21), washers
NH\DQGKH[QXWVNH\&DUHIXOO\OLIWWKH
upper actuator casing (key 11) off the lower actuator
FDVLQJNH\,QVSHFWWKHXSSHUDFWXDWRUFDVLQJ
NH\2ULQJVNH\IRU(=+6HULHVDQGNH\
for EZHSO Series) and anti-friction rings (key 8 for
(=+6HULHVDQGNH\IRU(=+626HULHVIRUGDPDJH
RUZHDU,IGDPDJHGUHPRYHDQGUHSODFHZLWKQHZ
SDUWV3ODFHWKHDQWLIULFWLRQULQJVLQWKHERG\¿UVWWKHQ
VOLGHWKH2ULQJEHWZHHQWKHDQWLIULFWLRQULQJV
/RRVHQFDSWXUHGVFUHZVNH\XQWLOIUHHWRVSLQ
Unscrew an eyebolt (key 35) from the cap and remove
WKHVFUHZVNH\WRUHPRYHFDSNH\IURPWKH
XSSHUDFWXDWRUFDVLQJNH\$WWDFKDQH\HEROWWRWKH
XSSHUVSULQJVHDWNH\DQGOLIWXSDQGUHPRYHWKH
VOHHYHDVVHPEO\NH\/LIWRIIWKHGLDSKUDJPSODWHV
DVVHPEO\5HPRYH2ULQJNH\DQGUHSODFHLWDV
QHHGHG,QVSHFWGLDSKUDJPNH\IRUGDPDJHRU
ZHDUUHPRYHVFUHZVNH\OLIWRIILQOHWSODWHNH\
WRUHSODFHGLDSKUDJPNH\DQG2ULQJNH\
$OLJQVFUHZKROHVRQWKHFDSNH\WRWKHVOHHYH
JXLGHVFUHZVNH\5HPRYHVOHHYHJXLGHNH\
XWLOL]LQJFDSNH\WRXQVFUHZRUE\XVLQJDFURZEDU
,QVSHFW2ULQJVNH\VDQGIRUGDPDJHRU
wear, replace anti-friction ring (key 8) and O-ring (key
LIQHFHVVDU\8QVFUHZWKHFDSVFUHZVNH\DQGRQ
136'1FRQVWUXFWLRQVUHPRYHFUXVKZDVKHUV
NH\/LIWRIIORZHUFDVLQJNH\2QWKH136
'1FRQVWUXFWLRQLQVSHFW2ULQJNH\VDQGIRU
GDPDJHRUZHDU5HSODFHLIQHFHVVDU\
5HPRYHFDJHNH\
5HPRYHVHDWULQJNH\,QVSHFWVHDWULQJIRUGDPDJH
RUZHDU,IGDPDJHGUHSODFHZLWKQHZSDUWV
5HPRYH2ULQJNH\IURPERG\NH\,QVSHFWIRU
GDPDJHRUZHDU,IGDPDJHGUHSODFHZLWKQHZSDUWV
2QWKH136DQG;'1DQG;
FRQVWUXFWLRQVWKHVHDWDGDSWRUNH\DQG2ULQJ
NH\VKRXOGDOVREHLQVSHFWHGIRUGDPDJHDQG
UHSODFHGLIGDPDJHG
/XEULFDWH2ULQJNH\DQGUHSODFHLQWRWKHERG\
Place seat ring (key 2) on top of O-ring (key 34) in body
NH\ZLWKWKHFXUYHGVLGHGRZQDQGVHDWHGJHXS
3ODFHFDJHNH\RQWKHWRSRIVHDWULQJNH\
3ODFHORZHUFDVLQJNH\RQWRSRIWKHERG\2Q
136'1FRQVWUXFWLRQVUHSODFHZDVKHUNH\
ZLWKQHZSDUWV7LJKWHQFDSVFUHZVNH\6FUHZ
VOHHYHJXLGHNH\LQWRORZHUFDVLQJNH\XWLOL]LQJ
FDSNH\RUE\XVLQJDFURZEDU
Lubricate the sleeve (key 14) in the upper plate contact
area and assemble the diaphragm/plates assembly on
WKHVOHHYHDVVHPEO\7LJKWHQVFUHZVNH\XVLQJ
D³VWDU´FULVVFURVVSDWWHUQIRU¿YHWLPHVXQWLOSURSHU
VSHFL¿HGWRUTXHLVDFKLHYHG
6FUHZWKHFDSWXUHGVFUHZVNH\±DOUHDG\RQWKH
VOHHYH±WR¿[WKHGLDSKUDJPSODWHVDVVHPEO\RQWKH
VOHHYHDVVHPEO\7LJKWHQVFUHZVNH\XVLQJD³VWDU´
FULVVFURVVSDWWHUQIRU¿YHWLPHVXQWLOSURSHUVSHFL¿HG
WRUTXHLVDFKLHYHG
Lubricate lower casing (key 5) on the diaphragm
FRQWDFWDUHD
Carefully insert the sleeve assembly into the sleeve
JXLGHNH\XWLOL]LQJWKHH\HEROWVNH\WKDW¿WVLQ
WKHXSSHUVSULQJVHDWNH\WKUHDGHGKROH
Note
The O-rings (key 9) may need to be removed
and stretched by hand in order for the sleeve
assembly to have sufficient clearance to
slide back into the sleeve guide.
Lubricate the diaphragm (key 20) on the upper casing
FRQWDFWDUHD
/XEULFDWHDQGPRXQWWKH2ULQJNH\RQWKHFDS
NH\/XEULFDWHDQGPRXQW2ULQJVNH\DQG
DQWLIULFWLRQULQJVNH\LQVLGHWKHFDSNH\For
EZHSO Series: lubricate and mount O-ring (key 153)
RQWKHVWHPNH\8QVFUHZWKHH\HEROWVNH\
IURPWKHXSSHUVSULQJVHDWNH\DQGFDUHIXOO\SODFH
WKHFDSRQWKHXSSHUDFWXDWRUFDVLQJNH\$OLJQ
WKHWUDYHOLQGLFDWRUKROHRQWKHFDSNH\WRWKH
XSSHUDFWXDWRUFDVLQJWUDYHOLQGLFDWRUKROH/XEULFDWH
FDSVFUHZVNH\DQGDWWDFKFDSNH\WRWKH
XSSHUFDVLQJNH\XVLQJFDSVFUHZVNH\%DJ
GLDSKUDJPÀDWWRORZHUDFWXDWRUFDVLQJGLDSKUDJP
ÀDQJHFRQWDFWDUHD&DUHIXOO\SODFHWKHXSSHUDFWXDWRU
casing on the top of the lower actuator casing/trim
V\VWHPXVLQJDVWXGWRJXLGH
Note
Rotate the upper casing such that the outer
holes for sensing lines are perpendicular to
JDVÀRZDQGRXWHUKROHVRIORZHUFDVLQJ
/XEULFDWHWKUHDGVRQEROWVNH\
%ROWWRJHWKHUWKHXSSHUDQGORZHUDFWXDWRUFDVLQJV
(keys 11 and 5) using cap screws (key 21), washers
NH\DQGKH[QXWVNH\7LJKWHQFDSVFUHZV
XVLQJD³VWDU´FULVVFURVVSDWWHUQIRU¿YHWLPHVXQWLO
SURSHUVSHFL¿HGWRUTXHLVDFKLHYHG
14
EZH and EZHSO Series
0RXQW2ULQJNH\RQWKHFDSNH\
For EZHSO Series:3ODFHWKHZDVKHUNH\RQWKH
VWHPNH\$VVHPEOHRQHQXWNH\WRWKHVWHP
NH\XQWLOWKHVSHFL¿HGWRUTXHLVDFKLHYHGDQGWKHQ
assemble another nut (key 151) to lock the position of
VWHP6FUHZRQWKHFORVLQJFDSNH\
6FUHZWKHH\HEROWVNH\RQWKHFDSNH\
,ISUHVHQWVHWWKHVWHPNH\WKURXJKWKHFDVLQJ
hole and tap it into the groove in the diaphragm plate
NH\6OLGHWKHWUDYHOLQGLFDWRU¿WWLQJNH\RYHU
WKHVWHPDQGWLJKWHQWRWKHFDSNH\
EZH Series Travel Indicator Maintenance
A new and improved travel indicator has been phased
LQGXULQJ7KHQHZYHUVLRQLPSURYHVWKH2ULQJ
VWHPVHDOWRPLQLPL]HOHDNDJHDQGH[WHQGVHUYLFHOLIH
The components of the legacy and new versions are not
LQWHUFKDQJHDEOH,IPDLQWHQDQFHLVSHUIRUPHGRQWKHQHZ
travel indicator, it is recommended to replace the entire travel
LQGLFDWRUDVVHPEO\ZLWKWKHQHZYHUVLRQ3DUWQXPEHUVIRU
WKHDVVHPEOLHVDUHVKRZQLQWKHSDUWVOLVW)LJXUHVKRZV
WKHGLIIHUHQFHEHWZHHQWKHGHVLJQV7KHVSDUHSDUWVNLWVZLOO
VXSSRUWHLWKHUGHVLJQ7DNHFDUHWRXVHWKHFRUUHFW2ULQJ
NH\$RU%ZKHQSHUIRUPLQJPDLQWHQDQFHVHHSDUWV
OLVWIRUWKHDSSURSULDWHSDUWQXPEHU
5HPRYHSODVWLFWUDYHOLQGLFDWRUFRYHUNH\
Loosen travel indicator bushing (key 140) and remove it
E\VOLGLQJLWRYHUWKHWUDYHOLQGLFDWRUVWHPNH\
5HPRYHLQGLFDWRU¿WWLQJNH\DQGLQVSHFW2ULQJ
NH\5HPRYH2ULQJNH\%DQGEDFNXSULQJV
NH\5HSODFHDQGOXEULFDWH2ULQJLIGDPDJHG
3XOOXSRQWKHWUDYHOLQGLFDWRUVWHPNH\WRIRUFH
the spring collet (key 144) out of the diaphragm head
JURRYH([DPLQHWKHVHSDUWVDQGWKHVWHPIRUZHDUDQG
UHSODFHLIQHFHVVDU\
Examine the retaining ring (key 145) for wear and
UHSODFHLIQHFHVVDU\
,QVHUWWKHWUDYHOLQGLFDWRUVWHPNH\DQGVSULQJ
FROOHWNH\EDFNLQWRWKHGLDSKUDJPKHDGJURRYH
5HSODFHWKHLQGLFDWRU¿WWLQJNH\DQG2ULQJ
(key 143) and tighten with a referenced torque of
IWOEV1P
/XEULFDWHWKH2ULQJNH\%DQGEDFNXSULQJV
NH\UHTXLUHG3ODFHRQHEDFNXSULQJRQWKH
VWHPNH\IROORZHGE\WKH2ULQJDQGWKHQWKHRWKHU
EDFNXSULQJ3XVKLQWRJURRYHRIWKHLQGLFDWRU¿WWLQJ
NH\
Slide the travel indicator bushing (key 140) over the
WUDYHOLQGLFDWRUVWHPNH\DQGWLJKWHQ¿UPO\LQSODFH
ZLWKDWRUTXHRIIWOEV1P
Replace the travel indicator cover (key 138) and tighten
¿UPO\LQSODFH
PRX Series Maintenance
CAUTION
Always remove spring (key 7) tension
before performing maintenance on this
unit. To remove spring tension, loosen
locknut (key 2) and back out adjusting screw
(key 1) until compression is removed from
the spring.
Lower Diaphragm Maintenance
'LVFRQQHFWSLORWDQGUHPRYHLWIURPWKHOLQH
Remove machine screws (key 10) from lower cover
(key 21) and the separate lower cover from the body
NH\
Use a wrench to hold the stem (key 23) and break loose
WKHVWHPQXWNH\5HPRYHWKHVWHPQXWDQGZDVKHU
NH\
Remove the upper diaphragm plate (key 13), diaphragm
NH\SDGKROGHUNH\DQG2ULQJNH\
,QVSHFWSDUWVIRUGDPDJHRUZHDUUHSODFHLIQHFHVVDU\
5HPRYHRUL¿FHNH\DQG2ULQJNH\,QVSHFW
WKHSDUWVIRUGDPDJHRUZHDUDQGUHSODFHLIQHFHVVDU\
Lightly lubricate the O-ring and place in the body
NH\,QVWDOOWKHRUL¿FH
6HWWKHSDGKROGHUNH\LQWKHERG\NH\
Lightly lubricate the rims of the diaphragm (key 14) and
SODFHLWRQWRSRIWKHSDGKROGHUNH\6HWWKHXSSHU
GLDSKUDJPSODWHNH\RQWKHGLDSKUDJPNH\
Lightly lubricate the O-ring (key 18) and place it in the
ORZHUFRYHUNH\
Place the washer (key 11) and stem nut (key 20) on
WKHVWHPNH\DQGWLJKWHQIf also performing Upper
Case Maintenance, skip to step 2 of the Upper Case
Maintenance section.
,QVHUWPDFKLQHVFUHZVNH\LQWKHORZHU
cover (key 21) and tighten uniformly to ensure
SURSHUVHDO
Upper Diaphragm Maintenance
'LVFRQQHFWSLORWDQGUHPRYHLWIURPWKHOLQH
Loosen locknut (key 2) and back out adjusting screw
NH\XQWLOFRPSUHVVLRQLVUHPRYHGIURPWKHVSULQJ
5HPRYHFDSNH\
/LIWWKHXSSHUVSULQJVHDWNH\VSULQJNH\DQG
2ULQJNH\RXWRIWKHXSSHUFRYHUNH\,QVSHFW
2ULQJDQGUHSODFHLIQHFHVVDU\
Remove the machine screws (key 10) and the washers
(key 11), separate the upper cover (key 8) from the
ERG\NH\DQGOLIWWKHORZHUVSULQJVHDWNH\DZD\
IURPXSSHUGLDSKUDJPQXWNH\8VHDZUHQFKWR
hold stem (key 23) securely while removing the upper
GLDSKUDJPQXW
15
EZH and EZHSO Series
Remove remaining loose components: washer (key 11),
upper diaphragm plate (key 13), diaphragm (key 14),
lower diaphragm plate (key 15) and O-rings (keys 18
DQG,QVSHFWGLDSKUDJPDQG2ULQJVIRUGDPDJHRU
ZHDUDQGUHSODFHLIQHFHVVDU\
/LJKWO\OXEULFDWHWKH2ULQJNH\3ODFH2ULQJRYHU
the stem (key 23) and press it down into the body
NH\
Set the lower diaphragm plate (key 15) into the body
NH\
Lightly lubricate the rims of the diaphragm (key 14)
DQGSODFHLWLQWKHERG\NH\RQWRSRIWKHORZHU
GLDSKUDJPSODWHNH\
Set the upper diaphragm plate (key 13) on top of the
GLDSKUDJPNH\
3ODFHZDVKHUNH\DQGVWHPQXWNH\RQWKH
stem (key 23) and tighten using a wrench to hold
WKHVWHP
3ODFHWKHORZHUVSULQJVHDWNH\RQWKHXSSHU
GLDSKUDJPQXWNH\DQGPRXQWWKHXSSHUFRYHU
(key 8) on top of the body (key 24) and the diaphragm
NH\
Place and uniformly tighten the machine screws
(key 10) to hold the body (key 24) and upper cover
NH\WRJHWKHU3RVLWLRQWKHGLDSKUDJPFRQYROXWLRQ
facing down and make sure that the diaphragm is not
GHIRUPHGDQGLVSURSHUO\LQVWDOOHG
,QVWDOOVSULQJNH\DQGXSSHUVSULQJVHDWNH\RQ
WRSRIWKHORZHUVSULQJVHDWNH\LQVLGHWKHXSSHU
FRYHUNH\,QVWDOO&DSNH\
Screw in adjusting screw (key 1) at desired spring
compression and use the lock nut (key 2) to lock the
DGMXVWLQJVFUHZVSRVLWLRQ5HIHUWR3LORW$GMXVWPHQW
VHFWLRQSDJHWRDGMXVWSLORWVHWWLQJV
Damper and Restrictor Maintenance
5HPRYHVFUHZNH\DQGSODWHNH\RIIIURPWKH
ERG\NH\
5HPRYHULQJQXWVNH\
5HPRYHGDPSHUDGMXVWLQJVFUHZZLWKKROHNH\
Remove and inspect O-ring (key 28) for damage or wear
DQGUHSODFHLIQHFHVVDU\/LJKWO\OXEULFDWH2ULQJEHIRUH
SODFLQJRQWKHDGMXVWLQJVFUHZ,QVHUWGDPSHUDGMXVWLQJ
VFUHZLQWRWKHERG\NH\DQGWLJKWHQ,QVHUWULQJQXW
NH\DQGWLJKWHQ%DFNRXWGDPSHUDGMXVWLQJVFUHZ
XQWLOLWVWRSV
5HPRYHUHVWULFWRUDGMXVWLQJVFUHZZLWKKROHNH\
Remove and inspect O-ring (key 28) for damage or wear
DQGUHSODFHLIQHFHVVDU\/LJKWO\OXEULFDWH2ULQJEHIRUH
SODFLQJRQWKHDGMXVWLQJVFUHZ,QVHUWUHVWULFWRUDGMXVWLQJ
VFUHZLQWRWKHERG\NH\DQGFRPSOHWHO\WLJKWHQ
,QVHUWULQJQXWNH\DQGFRPSOHWHO\WLJKWHQ%DFNRXW
UHVWULFWRUDGMXVWLQJVFUHZWXUQ
Note
When using a Type PRX/120 pilot with a
Type PRX/125 pilot as a monitor, use the
following settings:
Restrictor - completely tighten and then
back out three full turns.
Damper - back out until it stops.
,QVWDOOSODWHNH\DQGVFUHZNH\
Type SA/2 Maintenance
'LVFRQQHFWSLORWVXSSO\¿OWHUUHJXODWRUDQGUHPRYHLW
IURPWKHOLQH
5HPRYHFDSVFUHZVZDVKHUVDQGQXWVNH\VDQG
10)IURPERG\NH\DQGVHSDUDWH¿OWHUFRYHUNH\
DQGUHJXODWRUFRYHUNH\IURPWKHERG\NH\
Separate loose components from the body such as the
VSULQJNH\ZDVKHUNH\SODWHNH\¿OWHUQHW
(key 8), felt (key 12), diaphragm (key 18), spring washer
NH\DQGQXWNH\
Remove and inspect O-ring (key 13) for damage or wear
DQGUHSODFHLIQHFHVVDU\/LJKWO\OXEULFDWHWKH2ULQJ
EHIRUHSODFLQJLWEDFNLQWKH¿OWHUFRYHUNH\
&OHDQ¿OWHUQHWNH\5HSODFHIHOWNH\
,QVSHFWGLDSKUDJPNH\IRUGDPDJHRUZHDUDQG
UHSODFHLIQHFHVVDU\&KHFNWKHVHDWLQJVXUIDFHRIWKH
VFUHZXQLWNH\IRUHURVLRQVFUDWFKHVVSXUVRURWKHU
GDPDJHDQGUHSODFHLIQHFHVVDU\
8QVFUHZDQGUHPRYHWKHUHJXODWRUVHDWNH\,QVSHFW
2ULQJNH\IRUGDPDJHRUZHDUDQGUHSODFHLI
QHFHVVDU\/LJKWO\OXEULFDWHWKH2ULQJDQGSODFHLWRQ
WKHUHJXODWRUVHDW
3XOOSDGKROGHUXQLWNH\RXWRIWKHERG\NH\
,QVSHFWWKHVHDWIRUGDPDJHUHSODFHLIQHFHVVDU\
Set the pad holder unit (key 15) on the spring (key 14)
DQGLQVHUWWKHUHJXODWRUVHDWNH\7LJKWHQWKH
UHJXODWRUVHDWXQWLOLWVWRSV
Lightly lubricate the outer and inner rims of the
GLDSKUDJPNH\3ODFHWKHGLDSKUDJPRQWRWKH
VFUHZXQLWNH\DQGVOLGHWKHVFUHZXQLWLQWRWKH
UHJXODWRUVHDWNH\3ODFHSODWHNH\ZDVKHU
(key 3) and spring washer (key 20) and screw nut
NH\LQWRWKHVFUHZXQLW8VHFDUHWRDYRLGGDPDJH
WRSDUWVZKHQUHDVVHPEOLQJ
6HWWKHVSULQJNH\RQWRSRIWKHQXWNH\
$OLJQWKHUHJXODWRUFRYHUNH\RYHUWKHERG\
NH\ZLWKWKHVHQVHSRUW9RSSRVLWHWKHSLORWVXSSO\
SRUW5
3ODFHWKHIHOWNH\DQG¿OWHUQHWNH\RQHRQHDFK
VLGHRIWKHIHOWRQWKH¿OWHUFRYHUNH\
3LFNXSWKHERG\NH\DQGSODFHLWRQWKH¿OWHUFRYHU
NH\ZLWKWKHLQOHWSRUW0DOLJQHGYHUWLFDOO\ZLWKWKH
VHQVHSRUW9
,QVHUWFDSVFUHZVNH\3ODFHZDVKHUVNH\DQG
QXWVNH\RQWKHHQGRIWKHFDSVFUHZV7LJKWHQ
WKHQXWV
EZH and EZHSO Series
Parts Ordering
Each EZH or EZHSO Series regulator is assigned a serial
QXPEHUZKLFKFDQEHIRXQGRQWKHQDPHSODWH5HIHUWRWKH
VHULDOQXPEHUZKHQFRQWDFWLQJ\RXUORFDO6DOHV2I¿FHIRU
WHFKQLFDOLQIRUPDWLRQRUZKHQRUGHULQJSDUWV
When ordering replacement parts, reference the key
number of each needed part as found in the following parts
OLVW6HSDUDWHNLWFRQWDLQLQJDOOUHFRPPHQGHGVSDUHSDUWV
LVDYDLODEOH
Parts List
EZH and EZHSO Series Main Valve
(Figures 8 and 9)
Key Description Part Number
EZH Series
'LVN3DUWV.LWV
136DQG'1DQG
LQFOXGHNH\VDQG
136DQG;
'1DQG;
LQFOXGHNH\VDQG
136'1
1LWULOH1%5DQG)OXRURFDUERQ).0 5(=+;1
)OXRURFDUERQ).0 REZH1X00F12
Polyurethane (PU) REZH1X00P12
136'1
1LWULOH1%5DQG)OXRURFDUERQ).0 REZH2X00N12
)OXRURFDUERQ).0 REZH2X00F12
Polyurethane (PU) REZH2X00P12
136'1
1LWULOH1%5DQG)OXRURFDUERQ).0 REZH3X00N12
)OXRURFDUERQ).0 REZH3X00F12
Polyurethane (PU) REZH3X00P12
136'1
1LWULOH1%5DQG)OXRURFDUERQ).0 5(=+;1
)OXRURFDUERQ).0 5(=+;)
Polyurethane (PU) REZH4X00P12
136DQG;
'1DQG;%RGLHV
1LWULOH1%5 5(=+;1
)OXRURFDUERQ).0 5(=+;)
3RO\XUHWKDQH38 5(=+;3
EZHSO Series
'LVN3DUWV.LWV
136DQG'1DQG
LQFOXGHNH\VDQG
136'1
LQFOXGHNH\VDQG
136DQG['1DQG[
LQFOXGHNH\VDQG
136'1
1LWULOH1%5DQG)OXRURFDUERQ).0 5(=+6;1
)OXRURFDUERQ).0 5(=+6;)
Polyurethane (PU) REZHS1X0P12
136'1
1LWULOH1%5DQG)OXRURFDUERQ).0 5(=+6;1
)OXRURFDUERQ).0 5(=+6;)
Polyurethane (PU) REZHS2X0P12
136'1
1LWULOH1%5DQG)OXRURFDUERQ).0 5(=+6;1
)OXRURFDUERQ).0 5(=+6;)
Polyurethane (PU) REZHS3X0P12
136'1
1LWULOH1%5DQG)OXRURFDUERQ).0 5(=+6;1
)OXRURFDUERQ).0 5(=+6;)
Polyurethane (PU) REZHS4X0P12
136DQG;'1DQG
;%RGLHV
1LWULOH1%5 5(=+;1
)OXRURFDUERQ).0 5(=+;)
3RO\XUHWKDQH38 5(=+;3
EZH Series
)XOO5HSDLU.LWV
136DQG'1DQG
LQFOXGHNH\V
%DQG
136'1LQFOXGHNH\V
%DQG
136DQG;
'1DQG;
LQFOXGHNH\V
DQG
136'1
1LWULOH1%5DQG)OXRURFDUERQ).0 REZH1X00N22
)OXRURFDUERQ).0 REZH1X00F22
Polyurethane (PU) REZH1X00P22
136'1
1LWULOH1%5DQG)OXRURFDUERQ).0 REZH2X00N22
)OXRURFDUERQ).0 REZH2X00F22
Polyurethane (PU) REZH2X00P22
136'1
1LWULOH1%5DQG)OXRURFDUERQ).0 REZH3X00N22
)OXRURFDUERQ).0 REZH3X00F22
Polyurethane (PU) REZH3X00P22
136'1
1LWULOH1%5DQG)OXRURFDUERQ).0 5(=+;1
)OXRURFDUERQ).0 5(=+;)
Polyurethane (PU) REZH4X00P22
136DQG;'1DQG;%RGLHV
1LWULOH1%5 5(=+;1
)OXRURFDUERQ).0 5(=+;)
3RO\XUHWKDQH38 5(=+;3
136'1%RG\
1LWULOH1%5 5(=+;1
)OXRURFDUERQ).0 5(=+;)
Polyurethane (PU) REZH8X00P22
EZHSO Series
)XOO5HSDLU.LWV
136DQG'1DQG
LQFOXGHNH\V
%DQG
136'1LQFOXGHNH\V
%DQG
136DQG;'1DQG;
LQFOXGHNH\V
DQG
136'1
1LWULOH1%5DQG)OXRURFDUERQ).0 5(=+6;1
)OXRURFDUERQ).0 5(=+6;)
Polyurethane (PU) REZHS1X0P22
136'1
1LWULOH1%5DQG)OXRURFDUERQ).0 5(=+6;1
)OXRURFDUERQ).0 5(=+6;)
Polyurethane (PU) REZHS2X0P22
136'1
1LWULOH1%5DQG)OXRURFDUERQ).0 5(=+6;1
)OXRURFDUERQ).0 5(=+6;)
Polyurethane (PU) REZHS3X0P22
136'1
1LWULOH1%5DQG)OXRURFDUERQ).0 5(=+6;1
)OXRURFDUERQ).0 5(=+6;)
Polyurethane (PU) REZHS4X0P22
136DQG;
'1DQG;%RGLHV
1LWULOH1%5 5(=+6;1
)OXRURFDUERQ).0 5(=+6;)
3RO\XUHWKDQH38 5(=+6;3
136'1%RG\
1LWULOH1%5 5(=+6;1
)OXRURFDUERQ).0 5(=+6;)
Polyurethane (PU) REZHS8X0P22
%RG\ 6HHWKHIROORZLQJ7DEOH
2 Seat Ring, Stainless steel
136'1%RG\
)RU&DSDFLW\ (5$$$
)RU&DSDFLW\ (5$$$
)RU&DSDFLW\ (5$$$
)RU&DSDFLW\ (5$$$
Key Description Part Number
EZH and EZHSO Series
2 Seat Ring, Stainless steel (continued)
136'1%RG\
)RU&DSDFLW\ (5$$$
)RU&DSDFLW\ (5$$$
)RU&DSDFLW\ (5$$$
)RU&DSDFLW\ (5$$$
136'1%RG\
)RU&DSDFLW\ (5$$$
)RU&DSDFLW\ (5$$$
)RU&DSDFLW\ (5$$$
)RU&DSDFLW\ (5$$$
136'1%RG\
)RU&DSDFLW\ (5$$$
)RU&DSDFLW\ (5$$$
)RU&DSDFLW\ (5$$$
)RU&DSDFLW\ (5$$$
136'1%RG\
)RU&DSDFLW\ (5$$$
)RU&DSDFLW\ (5$$$
)RU&DSDFLW\ (5$$$
)RU&DSDFLW\ (5$$$
136;DQG
'1;DQG%RGLHV
)RU&DSDFLW\ (5$$$
)RU&DSDFLW\ (5$$$
)RU&DSDFLW\ (5$$$
3(1) Cage, Steel
136'1(standard) GE31405X012
136'1
6WDQGDUG *(;
:KLVSHU7ULP&DJH *(;
136'1
Standard GE38018X012
Whisper Trim Cage GE38021X012
136'1
6WDQGDUG 0;
:KLVSHU7ULP&DJH 0;
136;DQG'1
;DQG%RGLHV
6WDQGDUG (5$$$
Whisper Trim Cage ERAA24210A0
4* Anti-Friction Ring (2 required), PTFE
136'1%RG\ 0;
136'1%RG\ 0;
136'1%RG\ 0;
5 Actuator Lower Casing, Carbon steel
136'1%RG\ 0;
136'1%RG\ 0;
136'1%RG\ *(;
136'1%RG\ 0;
136;DQG
'1;DQG%RGLHV (5$$$
&DS6FUHZV=LQFSODWHGVWHHO
136'1%RG\UHTXLUHG 0;
136'1%RG\UHTXLUHG *(;
136'1%RG\UHTXLUHG *(;
136'1%RG\UHTXLUHG 0;
136DQG;'1DQG
;%RGLHVUHTXLUHG (5&$$
136'1%RG\UHTXLUHG (5&$$
2ULQJ
136'1%RG\
1LWULOH1%5 %;
)OXRURFDUERQ).0 %;
136'1%RG\
1LWULOH1%5 %;
)OXRURFDUERQ).0 %;
136'1%RG\
1LWULOH1%5 %;
)OXRURFDUERQ).0 %;
136'1%RG\ 0;
136DQG;
'1DQG;%RGLHV
1LWULOH1%5 (5&$$
)OXRURFDUERQ).0 (5&$$
136'1%RG\
1LWULOH1%5 3;
)OXRURFDUERQ).0 3;
8* Anti-Friction Rings (4 required), PTFE
136'1 0;
136'1 0;
136'1 0;
136'18 required for EZH Series,
UHTXLUHGIRU(=+626HULHV 0;
136;DQG
'1;DQG%RGLHV
(10 required for EZH Series,
UHTXLUHGIRU(=+626HULHV (5$$$
2ULQJUHTXLUHG)OXRURFDUERQ).0
136'1 0;
136'1 0;
136'1 0;
136'1
EZH Series 0;
EZHSO Series
1LWULOH1%5 (5$$$
)OXRURFDUERQ).0 0;
136;DQG
'1;DQG%RGLHVUHTXLUHG
for EZH Series, 3 required for EZHSO Series)
1LWULOH1%5 (5&$$
)OXRURFDUERQ).0 (5&$$
10 Pipe Plug, NPS 1, 2 and 3 /
'1DQGUHTXLUHG $
136;DQG
'1;
DQG%RGLHVUHTXLUHG $
11 Actuator Upper Casing, Carbon steel
NPS 1'1%RG\ 0;
NPS 2'1%RG\ 0;
NPS 3'1%RG\ *(;
NPS 4'1%RG\ 0;
136;DQG
'1;DQG%RGLHV (5$$$
13 Spring, Carbon steel
EZH Series
NPS 1'1%RG\ 0;
NPS 2'1%RG\ 0;
NPS 3'1%RG\ 0;
136;DQG
'1;DQG%RGLHV(2) - - - - - - - - - - -
EZHSO Series(2) - - - - - - - - - - -
14 Sleeve, Steel
EZH Series
NPS 1'1%RG\ 0;
NPS 2'1%RG\ 0;
NPS 3'1%RG\ 0;
136;DQG
'1;DQG%RGLHV
EZHSO Series(2) - - - - - - - - - - -
2ULQJ)OXRURFDUERQ).0
NPS 1'1%RG\ 0;
NPS 2'1%RG\ 0;
NPS 3'1%RG\ 0;
NPS 4'1%RG\
EZH and EZHSO Series,
1LWULOH1%5DQG)OXRURFDUERQ).0 0;
(=+626HULHVRQO\1LWULOH1%5 $;
136;DQG'1
;DQG%RGLHV
1LWULOH1%5 (5&$$
)OXRURFDUERQ).0 (5&$$
6RFNHW+HDG&DS6FUHZ=LQFSODWHGVWHHO
NPS 1'1%RG\UHTXLUHG 0;
NPS 2'1%RG\UHTXLUHG
(=+6HULHV 0;
(=+626HULHV %;
NPS 3'1%RG\UHTXLUHG 0;
NPS 4'1%RG\UHTXLUHG 0;
136;DQG'1;
DQG%RGLHVUHTXLUHG 0;
2ULQJ)OXRURFDUERQ).0
NPS 1'1%RG\ 0;
NPS 2'1%RG\ 0;
Key Description Part Number Key Description Part Number
*Recommended spare part
:KHQUHWUR¿WWLQJDQ(=+6HULHVZLWKSLQVZLWKWKHQHZFDJHLWLVDOVRQHFHVVDU\WRRUGHUWKH6HDW5LQJ
3DUWVDUHQRWRUGHUDEOH6HH7DEOHIRUVOHHYHDVVHPEO\LILWQHHGVWREHUHSODFHG
18
EZH and EZHSO Series
NPS 3'1%RG\ 0;
NPS 4'1%RG\(=+DQG(=+626HULHV
1LWULOH1%5DQG)OXRURFDUERQ).0 0;
(=+626HULHVRQO\)OXRURFDUERQ).0 (5$$$
136;DQG'1
;DQG%RGLHV
1LWULOH1%5 (5&$$
)OXRURFDUERQ).0 (5&$$
,QOHW3ODWH&DUERQVWHHO
NPS 1'1%RG\ 0;
NPS 2'1%RG\ 0;
NPS 3'1%RG\ 0;
NPS 4'1%RG\ 0;
136;DQG'1
;DQG%RGLHV (5$$$
2XWOHW3ODWH&DUERQVWHHO
136'1%RG\ 0;
136'1%RG\ 0;
136'1%RG\ 0;
136'1%RG\ 0;
136;DQG'1
;DQG%RGLHV (5$$$
'LDSKUDJP1LWULOH1%5
136'1%RG\ 0;
136'1%RG\ 0;
136'1%RG\ 0;
136'1%RG\ 0;
136;DQG'1
;DQG%RGLHV (5$$$
21 Cap Screw, Zinc-plated steel
136'1%RG\
(14 required for EZH Series,
UHTXLUHGIRU(=+626HULHV $
136'1%RG\
(14 required for EZH Series,
UHTXLUHGIRU(=+626HULHV 3;
136'1%RG\
(14 required for EZH Series,
UHTXLUHGIRU(=+626HULHV *);
136'1%RG\UHTXLUHG 0;
136;DQG'1
;DQG%RGLHVUHTXLUHG 0;
22 Plain Washer, Steel
136'1%RG\UHTXLUHG 0;
136'1%RG\UHTXLUHG 0;
136'1%RG\UHTXLUHG 0;
136'1%RG\UHTXLUHG 0;
136;DQG'1
;DQG%RGLHVUHTXLUHG 0;
23 Hex Nut, Zinc-plated carbon steel
136'1%RG\UHTXLUHG $
136'1%RG\UHTXLUHG $
136'1%RG\UHTXLUHG (5&$$
136'1%RG\UHTXLUHG 0;
136;DQG'1
;DQG%RGLHVUHTXLUHG 0;
&RQWLQXRXV7KUHDG6WXG%ROW=LQF3ODWHG6WHHO
136DQG'1DQG%RGLHVRQO\
136'1%RG\UHTXLUHG 0;
136'1%RG\UHTXLUHG *(;
136'1%RG\UHTXLUHG 0;
136;DQG'1
;DQG%RGLHVUHTXLUHG (5&$$
,QWHUPHGLDWH)ODQJH&DUERQVWHHO
136'1%RG\ 0;
136'1%RG\ 0;
136'1%RG\ *(;
136'1%RG\ (5$$$
136;'1;%RG\ (5$$$
136'1%RG\ (5$$$
+H[1XW6WHHO
136'1%RG\UHTXLUHG $
136'1%RG\UHTXLUHG $
136'1%RG\UHTXLUHG 0;
136;DQG'1
;DQG%RGLHVUHTXLUHG 0;
6OHHYH$GDSWRU&DUERQVWHHO
EZH Series
136'1%RG\ 0;
136'1%RG\ 0;
136'1%RG\ 0;
136;DQG'1
;DQG%RGLHV
EZHSO Series(2) - - - - - - - - - - -
28* O-ring, )OXRURFDUERQ).0
136'1%RG\ 0;
136'1%RG\ 0;
136'1%RG\ 0;
2ULQJ(3)
EZH Series
136'1 0;
136'1 0;
136'1 0;
136'1
1LWULOH1%5 0;
)OXRURFDUERQ).0 0;
136;DQG'1
;DQG%RGLHV
1LWULOH1%5 (5$$$
)OXRURFDUERQ).0 (5$$$
EZHSO Series
136'1 *(;
136'1 +;
136'1 5
136'1
1LWULOH1%5 +
)OXRURFDUERQ).0 0;
136;DQG'1
;DQG%RGLHV
1LWULOH1%5 (5$$$
)OXRURFDUERQ).0 (5$$$
'LVN+ROGHU$VVHPEO\
EZH Series
136'1%RG\
1LWULOH1%5 0;
)OXRURFDUERQ).0 0;
3RO\XUHWKDQH38 (5$$$
136'1%RG\
1LWULOH1%5 0;
)OXRURFDUERQ).0 0;
3RO\XUHWKDQH38 (5$$$
136'1%RG\
1LWULOH1%5 0;
)OXRURFDUERQ).0 0;
3RO\XUHWKDQH38 (5$$$
136'1%RG\
1LWULOH1%5 0;
)OXRURFDUERQ).0 0;
3RO\XUHWKDQH38 (5$$$
136;DQG'1
;DQG%RGLHV
1LWULOH1%5 (5$$$
)OXRURFDUERQ).0 (5$$$
Polyurethane (PU) ERAA24008A0
EZHSO Series
136'1%RG\
1LWULOH1%5 *(;
)OXRURFDUERQ).0 *(;
3RO\XUHWKDQH38 (5$$$
136'1%RG\
1LWULOH1%5 *(;
)OXRURFDUERQ).0 *(;
3RO\XUHWKDQH38 (5$$$
136'1%RG\
1LWULOH1%5 *(;
)OXRURFDUERQ).0 *(;
3RO\XUHWKDQH38 (5$$$
136'1%RG\
1LWULOH1%5 *(;
)OXRURFDUERQ).0 *(;
3RO\XUHWKDQH38 (5$$$
Key Description Part Number Key Description Part Number
*Recommended spare part
3DUWVDUHQRWRUGHUDEOH6HH7DEOHIRUVOHHYHDVVHPEO\LILWQHHGVWREHUHSODFHG
,QFOXGHGDOVRLQ(=+626HULHVVOHHYHVXEDVVHPEO\136DQG'1DQG
EZH and EZHSO Series
Figure 7. EZH Series Travel Indicator Assembly
APPLY LUBRICANT (L) / SEALANT (S)(1):
L2 = SILICONE-BASED OR PTFE-BASED GREASE
S2 = ANAEROBIC METHACRYLATE SEALANT FOR THREADS
/XEULFDQWDQGVHDODQWPXVWEHVHOHFWHGVXFKWKDWWKH\PHHWWKHWHPSHUDWXUHUHTXLUHPHQWV
3 IMPROVED TRAVEL INDICATOR DETAIL
TOP VIEW
138
139
140
141
LEGACY TRAVEL INDICATOR DETAIL
143 L2
140 140
142A
138
139
140
141
143 L2
160
L2
145
144 S2
145
144 S2
TOP VIEW
142B
L2
'LVN+ROGHU$VVHPEO\FRQWLQXHG
136;DQG'1
;DQG%RGLHV
1LWULOH1%5 (5$$$
)OXRURFDUERQ).0 (5$$$
Polyurethane (PU) ERAA24008A0
'LVN5HWDLQHU
(=+6HULHVRQO\1LWULOH1%5
DQG)OXRURFDUERQ).0
136'1%RG\ 0;
136'1%RG\ 0;
136'1%RG\ 0;
136'1%RG\ 0;
136;DQG'1
;DQG%RGLHV
EZH Series, Polyurethane (PU)
136'1 (5$$$
136'1 (5$$$
136'1 (5$$$
136'1 (5$$$
136;DQG'1
;DQG%RGLHV (5$$$
EZHSO Series, Polyurethane (PU)
136'1 (5$$$
136'1 (5$$$
136'1 (5$$$
136'1 (5$$$
136;DQG
'1;DQG%RGLHV (5$$$
32* Lock Washer, EZH Series only, Stainless steel
136'1%RG\UHTXLUHG 0;
136'1%RG\UHTXLUHG 0;
136'1%RG\UHTXLUHG 0;
136'1%RG\UHTXLUHG 0;
136;DQG'1
;DQG%RGLHVUHTXLUHG (5$$$
33 Socket Head Cap Screw
136'1%RG\(=+6HULHVRQO\UHTXLUHG 0;
136'1%RG\(=+6HULHVRQO\UHTXLUHG 0;
136'1%RG\(=+6HULHVRQO\UHTXLUHG 0;
136'1%RG\(=+6HULHVRQO\UHTXLUHG 0;
136;DQG'1
;DQG%RGLHVUHTXLUHG 0;
34* O-ring
136'1
1LWULOH1%5 0;
)OXRURFDUERQ).0 0;
136'1
1LWULOH1%5 0;
)OXRURFDUERQ).0 0;
136'1
1LWULOH1%5 0;
)OXRURFDUERQ).0 0;
136'1
1LWULOH1%5 0;
)OXRURFDUERQ).0 0;
136;DQG'1
;DQG%RGLHV
1LWULOH1%5 +;
)OXRURFDUERQ).0 +;
%UDFNHWRU(\HEROWUHTXLUHG6WHHO
136'1%RG\%UDFNHW 0;
136'1%RG\%UDFNHW 0;
136'1%RG\(\HEROW 0;
136'1%RG\(\HEROW 0;
136;DQG'1
;DQG%RGLHV(\HEROW 0;
1DPHSODWH
'ULYH6FUHZUHTXLUHG6WDLQOHVVVWHHO
Key Description Part Number Key Description Part Number
*Recommended spare part
20
EZH and EZHSO Series
Other manuals for EZH Series
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