Emerson Fisher 161AY Series User manual

Type EZR Pressure Reducing Regulator
Introduction
Scope of the Manual
This instruction manual provides installation,
startup, adjustment, maintenance and parts ordering
information for Type EZR pressure reducing regulator,
Types 112 restrictor, 161AY, 161EB and PRX Series
pilot. Any accessories used with this regulator are
covered in their respective instruction manuals.
Product Description
The Type EZR pilot-operated, pressure reducing
regulators are used for natural gas, air or other
non-corrosive gas applications and include a
Type 112 restrictor and a 161EB, 161AY or
PRX Series pilot.
Pilot Type Descriptions
Type 161AY—Low-pressure pilot with an outlet
pressure range of 6 in. w.c. to 7 psig / 15 mbar to
0.48 bar. Pilot bleeds (exhausts) downstream through
the sense (control) line.
Figure 1. Type EZR Pressure Reducing Regulator
!
WARNING
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion
and/or re 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. Only a qualied person must install
or service the regulator.
TYPE EZR REGULATOR
161AY SERIES PILOT
TYPE PRX PILOT
Instruction Manual
D102600X012
August 2018
Type EZR

Main Valve Body Sizes, End Connection Styles
and Structural Design Ratings(1)(2)
See Table 1
Maximum Inlet Pressures and Pressure Drops(1)
Main Valve: See Table 10
Pilots: See Table 3
Restrictor: 1500 psig / 103 bar
Outlet (Control) Pressure Ranges
See Table 2
Main Valve Plug Travel
NPS 1, 1-1/4 x 1, 2 x 1 /
DN 25, 32 x 25, 50 x 25: 0.37 in. / 9.4 mm
NPS 2 / DN 50: 0.68 in. / 17 mm
NPS 3 / DN 80: 0.98 in. / 25 mm
NPS 4 / DN 100: 1.19 in. / 30 mm
NPS 6 / DN 150: 1.5 in. / 38 mm
NPS 8 / DN 200: 1.75 in. / 44 mm
Minimum and Maximum Differential Pressures(1)
See Tables 4 and 10
Proportional Bands
See Table 2
Process Temperature Capabilities(1)
See Table 8
Pressure Registration
External
Options
• Integral Slam-Shut Device
• Pre-piped Pilot Supply and Pilot Bleed
• Travel Indicator
• Inlet Strainer
• Type 252 Pilot Supply Filter
• Trim Package
• Restricted Capacity Trim
• Pilot Diaphragm for Pressure Loading
Type 161AYM—The monitor version of the Type 161AY
pilot. The pilot bleed (exhaust) is isolated from the sense
(control) line. This pilot is used in monitoring systems
requiring an isolated pilot bleed (exhaust).
Type 161EB—High accuracy pilot with an outlet
pressure range of 5 to 350 psig / 0.34 to 24.1 bar.
Pilot bleeds (exhausts) downstream through the sense
(control) line.
Type 161EBM—The monitor version of the Type 161EB
pilot. The pilot bleed (exhaust) is isolated from the sense
(control) line. This pilot is used in monitoring systems
requiring an isolated pilot bleed (exhaust).
Type 161EBH—The high pressure version of the
Type 161EB pilot with an outlet pressure range from
250 to 700 psig / 17.2 to 48.3 bar.
Type 161EBHM—The high pressure version of the
Type 161EBM pilot with an outlet pressure range from
250 to 700 psig / 17.2 to 48.3 bar.
Type PRX/120—Outlet pressure range of 14.5 to
435 psig / 1.00 to 30.0 bar. The Type PRX/120 can be
used as the pilot on single-stage pressure reducing
regulators or as the monitor pilot or working pilot in
wide-open monitor systems. The Type PRX has a
double diaphragm which provides increased accuracy
and sensitivity, an integral restrictor adjustment which
allows adjustable opening and closing speeds and
a damper adjustment which adjusts inlet pressure
variability and loading pressure oscillations.
Type PRX/120-AP—Outlet pressure range of 435 to
1000 psig / 30.0 to 69.0 bar. The Type PRX/120-AP
can be used as the pilot on single-stage pressure
reducing regulators, as the monitor pilot or working
pilot in wide-open monitor systems or as the working
pilot for monitoring and working regulators in the
working monitoring systems.
Type PRX/125—Identical to the Type PRX/120 except
the restriction screw is removed. The Type PRX/125
can only be used as the monitor override pilot on
working monitor applications.
Type PRX/125-AP—Identical to the Type PRX/120-AP
except the restriction screw is removed. The
Type PRX/125-AP can only be used as the monitor
override pilot on working monitor applications.
Note
For applications requiring extremely
tight control, using a Type 161AYM,
161EBM, 161EBHM or PRX/120 pilot will
increase the accuracy of the regulator.
1. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.
2. End connections for other than ASME standard can usually be provided, contact your local Sales Ofce for assistance.
Specications
Specications for the Type EZR regulator are shown below. The control spring range for the pilot is marked on the
spring case of 161EB Series pilots and on the nameplate of 161AY and PRX Series pilots. Other information for
the main valve appears on the nameplate.
2
Type EZR

MAIN VALVE BODY SIZE, NPS / DN MAIN VALVE BODY MATERIAL END CONNECTION STYLE(1) STRUCTURAL DESIGN RATING(2)
2 x 1, 2, 3, 4 and 6 /
50 x 25, 50, 80, 100 and 150 Cast iron
NPT (NPS 2 x 1 and 2 / DN 50 x 25 and 50 only) 400 psig / 27.6 bar
CL125 FF 200 psig / 13.8 bar
CL250 RF 500 psig / 34.5 bar
1, 1-1/4 x 1(3), 2 x 1, 2, 3, 4,
6 x 4(4), 8 x 4(4), 6, 8 x 6(4) and 12 x 6(4) / 25, 32
x 25, 50 x 25, 50, 80,
100,150 x 100, 200 x 100, 150,
200 x 150 and 300 x 150
WCC Steel
NPT or SWE (NPS 1, 2 x 1 and 2 /
DN 25, 50 x 25 and 50 only) 1500 psig / 103 bar
CL150 RF 290 psig / 20.0 bar
CL300 RF 750 psig / 51.7 bar
CL600 RF or BWE 1500 psig / 103 bar
8 / 200 LCC Steel
CL150 RF 290 psig / 20.0 bar
CL300 RF 750 psig / 51.7 bar
CL600 RF 1500 psig / 103 bar
1. Ratings and end connections for other than ASME standard can usually be provided. Contact your local Sales Ofce for assistance.
2. See Tables 3, 8, 10 and 11 for diaphragm materials and additional pressure ratings.
3. Available in steel NPT only.
4. NPS 6 x 4, 8 x 4, 8 x 6, 12 x 6 / DN 150 x 100, 200 x 100, 200 x 150, 300 x 150 Types EZR and 399 bodies are not the same as the EW valve bodies and are not interchangeable.
Table 1. Main Valve Body Sizes, End Connection Styles and Body Ratings
TYPE MAXIMUM INLET PRESSURE MAXIMUM EMERGENCY OUTLET PRESSURE OR
MAXIMUM EMERGENCY SENSE PRESSURE(1)
MAXIMUM BLEED (EXHAUST) PRESSURE
FOR MONITOR PILOTS
psig bar psig bar psig bar
161AY 150 10.3 150 10.3 - - - -
161EB and 161EBH 1500 103 1200 82.7
161AYM 150 10.3 150 10.3 150 10.3
161EBM and 161EBHM 1500 103 1200 82.7 1500 103
PRX Series 1480 102 1480 102 1480 102
1. Maximum pressure to prevent the casings from bursting during abnormal operation (leaking to atmosphere and internal parts damage may occur).
Table 3. Pilot Pressure Ratings
Table 2. Outlet (Control) Pressure Ranges, Proportional Bands and Pilot Control Spring Information
TYPE OUTLET (CONTROL) PRESSURE RANGE PROPORTIONAL BAND(1)(3) PILOT CONTROL SPRING INFORMATION
Part Number Color Code Wire Diameter Free Length
psig bar psig bar In. mm In. mm
161AY or
161AYM
6 to 15 in. w.c.
0.5 to 1.2
1.2 to 2.5
2.5 to 4.5
4.5 to 7
15 to 37
34 to 83
83 mbar to 0.17 bar
0.17 to 0.31
0.31 to 0.48
1 in. w.c.
1 in. w.c.
0.5
0.5
0.5
3 mbar(2)
3 mbar(2)
34 mbar(2)
34 mbar(2)
34 mbar(2)
1B653927022
1B537027052
1B537127022
1B537227022
1B537327052
Olive drab
Yellow
Light green
Light blue
Black
0.105
0.114
0.156
0.187
0.218
2.67
2.90
3.96
4.75
5.54
3.75
4.31
4.13
3.94
4.13
95.2
109
105
100
105
161EB or
161EBM
5 to 15
10 to 40
30 to 75
70 to 140
130 to 200
200 to 350
0.34 to 1.0
0.69 to 2.8
2.1 to 5.2
4.8 to 9.7
9.0 to 13.8
13.8 to 24.1
0.5
0.5
0.6
1.3
1.5
3
34 mbar(2)
34 mbar(2)
41 mbar(2)
90 mbar(2)
0.10(2)
0.21(2)
17B1260X012
17B1262X012
17B1259X012
17B1261X012
17B1263X012
17B1264X012
White
Yellow
Black
Green
Blue
Red
0.120
0.148
0.187
0.225
0.262
0.294
3.05
3.76
4.75
5.71
6.65
7.47
3.75
3.75
4.00
3.70
3.85
4.22
95.2
95.2
102
94.0
97.8
107
161EBH or
161EBHM
250 to 450 17.2 to 31.0 3.5 0.24(5) 17B1263X012 Blue 0.262 6.66 3.85 97.8
400 to 700 27.6 to 48.2 7 0.48(5) 17B1264X012 Red 0.294 7.47 4.22 107
161EB(4) 30 to 300 2.1 to 20.7 6 0.41 15A9258X012 Green 0.243 6.17 1.88 47.7
TYPE
OUTLET (CONTROL)
PRESSURE RANGE ACCURACY CLASS (AC)(1)
PILOT CONTROL SPRING INFORMATION
Part Number Color Code
Wire Diameter Free Length
psig bar In. mm In. mm
PRX/120
PRX/125
14.5 to 26
23 to 44
41 to 80
73 to 123
1.00 to 1.8
1.6 to 3.0
2.8 to 5.5
5.0 to 8.5
2.5%
2.5%
2.5%
2.5%
M0255240X12
M0255230X12
M0255180X12
M0255220X12
Yellow
Green
Blue
Black
0.110
0.126
0.138
0.157
2.79
3.20
3.50
3.99
2.16 54.9
116 to 210
203 to 334
319 to 435
8.0 to 14.5
14.0 to 23.0
22.0 to 30.0
1%
1%
1%
M0255210X12
M0255200X12
M0255860X12
Silver
Gold
Aluminum
0.177
0.197
0.236
4.50
5.00
5.99
2.16
2.00
2.00
54.9
50.8
50.8
PRX/120-AP
PRX/125-AP 435 to 1000 30.0 to 69.0 1% M0273790X12 Clear 0.335 8.51 3.93 99.8
1. Proportional band and Accuracy Class include outlet pressure drop plus hysteresis (friction), but do not include lockup.
2. Proportional band was determined with a pressure drop ranging from 50 to 150 psig / 3.5 to 10.3 bar. Approximately double the proportional band if the pressure drop is less than
50 psig / 3.5 bar.
3. With Type 112 restrictor set on 2. With Type PRX restrictor turn the restrictor screw one turn counterclockwise from fully seated.
4. Should only be used as the intermediate reduction pilot on the Type EZR worker/monitor systems.
5. Proportional band was determined with a pressure drop ranging from 100 to 300 psig / 6.9 to 20.7 bar. Approximately double the proportional band if the pressure drop is less than
100 psi / 6.9 bar.
3
Type EZR

Table 4. Main Valve Minimum Differential Pressures(1)
Principle of Operation
As long as the outlet (control) pressure is above
the outlet pressure setting, the pilot valve plug or
disk remains closed (Figure 2). Force from the main
spring, in addition to inlet pressure bleeding through
the Type 112 restrictor (the restrictor is integral in
the PRX Series pilots), provides downward loading
pressure to keep the main valve diaphragm and plug
assembly tightly shutoff.
When the outlet pressure decreases below the pilot
outlet pressure setting, the pilot plug or disk assembly
opens. Loading pressure bleeds downstream through
the pilot faster than it can be replaced through the
Type 112 restrictor. This reduces loading pressure on
top of the main valve diaphragm and plug assembly.
The force imbalance on the diaphragm allows the inlet
pressure to overcome the loading pressure and main
spring force and open the Type EZR diaphragm and
plug assembly.
As the outlet pressure rises toward the outlet pressure
setting, it compresses the pilot diaphragm against the
pilot control spring and allows the pilot valve plug or
disk close. Loading pressure begins building on the
Type EZR diaphragm and plug assembly. The loading
pressure, along with force from the main spring,
pushes the diaphragm and plug assembly onto the
tapered-edged seat, producing tight shutoff.
MAIN VALVE
BODY SIZE,
NPS / DN
MAIN SPRING PART
NUMBER AND
COLOR CODE
DIAPHRAGM
MATERIAL
MINIMUM DIFFERENTIAL, PERCENT OF CAGE CAPACITY
FOR 90% CAPACITY FOR 100% CAPACITY
100% Trim 60% Trim 30% Trim 100% Trim 60% Trim 30% Trim
psi bar psi bar psi bar psi bar psi bar psi bar
1 and 1-1/4 x 1 /
25 and 32 x 25
19B2400X012, Light Blue 17E68 and 17E88 24 1.7 29 2.0 31 2.2 24 1.7 31 2.2 40 2.8
GE12727X012, Black 17E97 35 2.5 38 2.7 42 2.9 35 2.5 39 2.7 52 3.6
17E68 and 17E88 30 2.1 35 2.4 39 2.7 30 2.1 36 2.5 52 3.6
19B2401X012,
Black with White Stripe(3) 17E88 and 17E97 43 3.0 50 3.4 56 3.9 43 3.0 53 3.7 68 4.7
2 x 1 / 50 x 25
19B2400X012, Light Blue 17E68 and 17E88 24 1.7 29 2.0 31 2.2 24 1.7 31 2.2 40 2.8
19B2401X012,
Black with White Stripe
17E97 43 3.0 50 3.4 56 3.9 43 3.0 53 3.7 68 4.7
17E68 and 17E88 43 3.0 50 3.4 56 3.9 43 3.0 53 3.7 68 4.7
GE12501X012,
Red Stripe(3) 17E97 68 4.7 73 5.0 88 6.1 72 5.0 81 5.6 102 7.0
2 / 50
19B0951X012, Yellow(2) 17E68 and 17E88 12 0.83 15 1.0 15 1.0 12 0.83 25 1.7 20 1.4
18B2126X012, Green 17E97 24 1.7 25 1.7 26 1.8 24 1.7 30 2.1 37 2.6
17E68 and 17E88 18 1.2 20 1.4 22 1.5 19 1.3 26 1.8 28 1.9
18B5955X012, Red(3)(4)
GE05504X012, Purple(3)(4) 17E88 and 17E97 29 2.0 29 2.0 31 2.1 31 2.1 35 2.4 43 3.03
3 / 80
T14184T0012, Yellow(2) 17E68 and 17E88 16 1.1 19 1.3 24 1.7 23 1.6 23 1.6 29 2.0
19B0781X012, Light Blue 17E97 23 1.6 23 1.6 23 1.6 23 1.6 23 1.6 25 1.7
17E68 and 17E88 21 1.5 22 1.5 28 1.9 28 1.9 28 1.9 33 2.3
19B0782X012, Black(3) 17E88 and 17E97 32 2.2 33 2.3 43 3.0 38 2.6 38 2.6 50 3.4
4, 6 x 4 and, 8 x 4 /
100, 150 x 100
and 200 x 100
T14184T0012, Yellow(2) 17E68 and 17E88 10 0.69 12 0.83 14 0.97 25 1.7 25 1.7 25 1.7
18B8501X012, Green 17E97 16 1.1 17 1.2 21 1.5 34 2.3 34 2.3 34 2.3
17E68 and 17E88 16 1.1 17 1.2 20 1.4 30 2.1 30 2.1 30 2.1
18B8502X012, Red(3) 17E88 and 17E97 21 1.5 24 1.7 26 1.8 40 2.8 40 2.8 40 2.8
6, 8 x 6 and
12 x 6 /
150, 200 x 150
and 300 x 150
19B0364X012, Yellow(2) 17E97 10 0.69 11 0.76 14 0.97 12 0.83 16 1.1 16 1.1
17E88 10 0.69 13 0.90 13 0.90 12 0.83 21 1.5 21 1.5
19B0366X012, Green 17E97 14 0.97 22 1.5 22 1.5 19 1.3 29 2.0 29 2.0
17E88 17 1.2 21 1.5 21 1.5 20 1.4 36 2.5 36 2.5
19B0365X012, Red(3) 17E88 and 17E97 23 1.6 29 2.0 29 2.0 30 2.1 41 2.8 41 2.8
8 / 200
GE09393X012, Yellow(2)
17E97
16 1.1
- - - - - - - -
19 1.3
- - - - - - - -GE09396X012, Green 20 1.4 23 1.6
GE09397X012, Red(3) 26 1.8 30 2.1
1. See Table 1 for structural design ratings, Table 3 for pilot ratings and Table 10 for maximum pressure ratings.
2. The yellow spring is only recommended for inlet pressures under 100 psig / 6.9 bar.
3. The red, black, purple, red stripe and black with white stripe springs are only recommended for applications where the maximum inlet pressure can exceed 500 psig / 34.5 bar.
4. 18B5955X012 (Red) is used on constructions with travel indicator while GE05504X012 (Purple) is used on non-travel indicator constructions.
4
Type EZR

Figure 2. Type EZR Operational Schematic
TYPE 252 SUPPLY FILTER
TYPE PRX PILOT
TYPE EZR WITH PRX SERIES PILOT AND TYPE 252 FILTER
RESTRICTOR DAMPER
W7438_07/2008
B2625_2
161AY SERIES PILOT
TYPE 112 RESTRICTOR
TYPE 252 PILOT
SUPPLY FILTER
161EB SERIES PILOT
MAIN SPRING
DIAPHRAGM AND
PLUG ASSEMBLY
TYPE EZR WITH TYPES 161EB PILOT, 112 RESTRICTOR AND 252 FILTER
PORT S
PORT B
PORT A
PORT L
E0790_09/2006
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
LOADING PRESSURE
2
U
N
R
S
T
A
R
T
4
6
8
FLOW DIRECTION
MAIN SPRING
DIAPHRAGM AND
PLUG ASSEMBLY
FLOW DIRECTION
5
Type EZR

161 SERIES SINGLE PILOT INSTALLATION WITH PILOT EXHAUST INTO CONTROL LINE
BLOCK VALVE BLOCK VALVE
OUTLET
HAND VALVE
ALTERNATE CONTROL LINE
CONTROL LINE
161 SERIES PILOT
RESTRICTOR
SUPPLY PRESSURE LINE
INLET
B2605_A
161 SERIES SINGLE PILOT INSTALLATION WITH SEPARATE PILOT EXHAUST LINE
BLOCK VALVE BLOCK VALVE
OUTLET
HAND VALVE
ALTERNATE CONTROL LINE
CONTROL LINE
161 SERIES
PILOT
RESTRICTOR
SUPPLY PRESSURE LINE
INLET
PILOT
EXHAUST
B2605_B
Figure 3. Typical Type EZR Single Installation Schematics
BLOCK VALVE BLOCK VALVE
OUTLET
INLET
SUPPLY PRESSURE LINE TYPE PRX PILOT
PILOT
EXHAUST HAND VALVE
ALTERNATE CONTROL LINE
CONTROL LINE
TYPE PRX SINGLE-PILOT INSTALLATION WITH SEPARATE PILOT EXHAUST LINE
Type EZR Installation
!
WARNING
Personal injury, equipment damage or
leakage due to escaping gas or bursting
of pressure-containing parts may result
if this regulator is overpressured or is
installed where service conditions could
exceed the limits given in Specications
section on page 2 or where conditions
exceed any ratings of the adjacent
piping or piping connections.
To avoid such injury or damage, provide
pressure-relieving or pressure-limiting
devices (as required by the appropriate
code, regulation or standard) to
prevent service conditions from
exceeding limits.
Additionally, physical damage to the
regulator could break the pilot off the
main valve, causing personal injury and
property damage due to escaping gas.
To avoid such injury and damage, install
the regulator in a safe location.
6
Type EZR

All Installations
The robust design of the Type EZR allows this
regulator to be installed indoors or outdoors. When
installed outdoors, the Type EZR does not require
protective housing. This regulator is designed
to withstand the elements. The powder paint
coating protects against minor impacts, abrasions
and corrosion.
When installed indoors, no remote venting is required
except on the pilot spring case. This regulator can
also be installed in a pit that is subject to ooding
by venting the pilot spring case above the maximum
possible ood level so the pilot setting can be
referenced at atmospheric pressure.
1. Only personnel qualied through training and
experience should install, operate and maintain a
regulator. Before installation, make sure that there
is no damage to or debris in the regulator. Also,
make sure that all tubing and piping are clean
and unobstructed.
Note
The Type EZR optional inlet strainer is
intended to prevent occasional large
particles from entering the main valve.
If the gas contains continuous particles,
upstream ltration is recommended.
When using an inlet strainer (key 23), do
not use the shim (key 23) and vice versa.
2. Type EZR regulator may be installed in any
orientation, as long as ow through the regulator
matches the direction of the arrow on the main
valve body. However, for easier maintenance,
install the regulator with the bonnet up.
CAUTION
When installing a Type EZR trim package
in an existing E-body, make sure ow is
up through the center of the cage and
down through the cage slots. In some
cases, correct ow path is achieved
by removing the body from the line
and turning it around. If this is done,
change the ow arrow to indicate the
correct direction. Damage may result
if ow is not in the correct direction.
After assembly, check the regulator for
shutoff and leakage to atmosphere.
Types EZR/399 restricted trim bodies
(NPS 6 x 4, 8 x 4, 8 x 6 and 12 x 6 /
DN 150 x 100, 200 x 100, 200 x 150 and
300 x 150) are different than EW valve
bodies and are not interchangeable.
Install trims only in correct restricted
trim bodies.
3. The standard pilot mounting position is as shown in
Figure 1. Other mounting positions are available.
4. Apply a good grade of pipe compound to the
external pipeline threads for a threaded body or
use suiTable line gaskets for a anged body. When
installing butt weld end connections, remove trim
before welding and make sure to use approved
welding practices. Use approved piping procedures
when installing the regulator.
CAUTION
A regulator may vent some gas to
the atmosphere. In hazardous or
ammable gas service, vented gas may
accumulate and cause personal injury,
death or property damage due to re
or explosion.
Vent a regulator in hazardous gas
service to a remote, safe location away
from air intakes or any hazardous
location. Protect the vent line or
stack opening against condensation
or clogging.
5. A clogged pilot spring case vent may cause the
regulator to function improperly. To prevent plugging
(and to keep the spring case from collecting moisture,
corrosive chemicals or other foreign material) point
the vent down, orient it to the lowest possible point
on the spring case or otherwise protect it. Inspect the
vent regularly to make sure it has not been plugged.
To remotely vent a spring case, remove the vent
and install obstruction-free tubing or piping into the
1/4 NPT vent tapping. Provide protection on a remote
vent by installing a screened vent cap onto the
remote end of the vent pipe. The 161AY Series pilot
has a vent restriction (key 55, Figure 20) to enhance
low ow stability. Do not remove this restriction.
!
WARNING
To avoid freeze-up because of pressure
drop and moisture in the gas, use
antifreeze practices, such as heating the
supply gas or adding a de-icing agent to
the supply gas.
7
Type EZR

BLOCK VALVE UPSTREAM REGULATOR DOWNSTREAM
REGULATOR BLOCK VALVE
OUTLET
INLET
SUPPLY
PRESSURE LINE PILOT
EXHAUST
TYPE PRX
PILOT
SUPPLY
PRESSURE
LINE
TYPE PRX
PILOT
CONTROL LINE
ALTERNATE
CONTROL LINE
HAND
VALVE
HAND
VALVE
Figure 4. Typical Type EZR Monitoring System Installation Schematics
161 SERIES WORKING MONITORING SYSTEM INSTALLATION
B2605_D
BLOCK VALVE BLOCK VALVE
OUTLET
HAND
VALVE
HAND VALVE
ALTERNATE
CONTROL LINE
CONTROL LINE
161 SERIES
PILOT
RESTRICTOR
SUPPLY
PRESSURE
LINE
CONTROL LINE
161 SERIES WORKING PILOT
161 SERIES
MONITOR PILOT
RESTRICTOR
SUPPLY
PRESSURE LINE
MONITOR REGULATOR WORKING
REGULATOR
INLET
161 SERIES WIDE-OPEN MONITORING SYSTEM INSTALLATION WITH PILOT EXHAUST TO INTERMEDIATE PRESSURE
B2605_C
BLOCK VALVE BLOCK VALVE
UPSTREAM REGULATOR DOWNSTREAM
REGULATOR
OUTLET
HAND VALVE
HAND
VALVE
ALTERNATE
CONTROL LINE
CONTROL LINE
CONTROL
LINE
161 SERIES
PILOT
RESTRICTOR
SUPPLY
PRESSURE
LINE
PILOT
EXHAUST
161 SERIES PILOT
RESTRICTOR
SUPPLY
PRESSURE LINE
INLET
161 SERIES WIDE-OPEN MONITORING SYSTEM INSTALLATION
BLOCK VALVE BLOCK VALVE
UPSTREAM REGULATOR DOWNSTREAM
REGULATOR
OUTLET
HAND VALVE
HAND
VALVE
ALTERNATE
CONTROL LINE
CONTROL LINE
CONTROL
LINE
161 SERIES
PILOT
RESTRICTOR
SUPPLY
PRESSURE
LINE
161 SERIES PILOT
RESTRICTOR
SUPPLY
PRESSURE LINE
INLET
TYPE PRX WIDE-OPEN MONITORING SYSTEM INSTALLATION
8
Type EZR

6. As shown in Figure 3, run a supply pressure line
from the upstream pipeline to the restrictor inlet
(use 3/8 NPT outer diameter tubing or larger).
Install a Type 252 pilot supply lter upstream of
the restrictor, if needed, to keep the supply source
from clogging the restrictor or pilot. Inspect and
clean this lter regularly to make sure it has not
been plugged.
7. Install a downstream pressure control line (as
shown in the appropriate view of Figure 3) to the
pilot control line connection. Connect the other
end of the control line at a minimum of 8 to 10 pipe
diameters downstream of the regulator in a straight
run of pipe. Do not place a control line connection in
a turbulent area, such as in or directly downstream
of a swage or elbow. Signicant restrictions in
the control line can prevent proper pressure
registration. When using a hand valve, it should be
a full ow valve, such as a full port ball valve. With
a Type 161EBM, 161EBHM or 161AYM pilot or a
PRX Series pilot, run a downstream exhaust bleed
line to the downstream bleed line connection in the
pilot body assembly.
8. Good piping practices usually require swaging up
to larger downstream piping to obtain reasonable
downstream uid velocity.
Wide-Open Monitor Installations
1. Follow the procedures in the All Installations
section and then continue with step 2 of
this section.
2. Pilot supply for the downstream monitoring regulator
must be obtained between the two regulators as
shown in Figure 4. For sizing purposes, add the
minimum differential pressure for each regulator
together to establish the required pressure drop
across the station.
3. In a wide-open Type EZR monitoring system, system
lockup will be that of the worker regulator on both an
upstream monitor when the upstream pilot exhaust is
piped to the intermediate pressure and a downstream
monitor with upstream pilot exhaust piped to either
intermediate pressure or outlet pressure. With these
congurations, the diaphragm of the monitor regulator
will change position with every load change. On an
upstream monitor with the upstream pilot exhaust
piped to downstream, lockup will occur at the
monitor’s setpoint and the diaphragm of the monitor
regulator will be fully open during normal conditions.
BLOCK VALVE UPSTREAM REGULATOR DOWNSTREAM
REGULATOR BLOCK VALVE
OUTLET
INLET
SUPPLY
PRESSURE LINE
PILOT
EXHAUST
TYPE PRX
PILOT SUPPLY
PRESSURE
LINE
TYPE PRX
PILOT
CONTROL LINE ALTERNATE
CONTROL LINE
HAND
VALVE
HAND
VALVE
Figure 4. Typical Type EZR Monitoring System Installation Schematics (continued)
TYPE PRX WORKING MONITOR SYSTEM INSTALLATION
CONTROL LINE
TYPE PRX WIDE-OPEN MONITORING SYSTEM INSTALLATION WITH PILOT EXHAUST TO INTERMEDIATE PRESSURE
BLOCK VALVE MONITOR REGULATOR
WORKING
REGULATOR BLOCK VALVE
OUTLET
INLET
SUPPLY
PRESSURE LINE
TYPE PRX-120
WORKING PILOT
TYPE PRX-125
MONITOR PILOT
SUPPLY
PRESSURE
LINE
ALTERNATE
CONTROL LINE
HAND
VALVE
HAND
VALVE
L(1)
L
A
A
S
S
B
B
(1) PLUGGED
9
Type EZR

Working Monitor Installations
On working monitor installations, the working monitor
regulator is always upstream and acts as a rst-stage
regulator through the working pilot during normal
operation. This arrangement allows the working
monitor’s performance to be observed at all times.
Then, should the second-stage regulator fail open,
the working monitor regulator assumes the entire
pressure reduction function of the system through the
monitoring pilot.
Use the following procedure when installing a working
monitor system.
1. Follow the procedures in the All Installations
section and then continue with step 2 of
this section.
2. Pilot supply pressure for the downstream
Type EZR regulator must be made directly
upstream of the Type EZR using
intermediate pressure.
3. Table 9 gives the spread between normal
distribution pressure and the minimum pressure at
which the monitor pilot can be set to take over if
the working regulator fails open.
4. Table 4 shows the minimum differential pressure
requirements across an individual regulator.
Because this application uses a rst-stage
and second-stage pressure reduction, add the
minimum differential pressure for each regulator
together to establish the required pressure drop
across the station. Do not exceed maximum pilot
ratings given in Table 3.
For Type PRX Working Monitor
As shown in Figure 5, run a supply pressure line
(use 3/8 NPT outer diameter tubing or larger) from the
upstream pipeline to the inlet (Port S) of the upstream
Type PRX-120 pilot. Install a Type 252 pilot supply
lter upstream of the pilot, if needed, to keep the
supply source from clogging the restrictor in the pilot.
Inspect and clean this lter regularly to make sure it
has not been plugged.
Connect the loading port (Port L) of the upstream
Type PRX-120 pilot to the bonnet of the upstream
Type EZR regulator. Connect the “B” port of the upstream
Type PRX-120 pilot to the “S” port of the upstream
Type PRX-125 pilot. Connect the “A” port (located on the
underside of the pilot) of the upstream Type PRX-120 pilot
to the intermediate pressure between the rst and second
Type EZR regulators as shown in Figure 5.
The “L” port of the upstream Type PRX-125 pilot is
plugged. Connect the “B” port of upstream
Type PRX-125 pilot to the intermediate pressure
between the rst and second Type EZR regulators.
Figure 5. Type EZR-PRX-PRX Working Monitor Schematic
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
LOADING PRESSURE
INTERMEDIATE PRESSURE
TYPE PRX:
S- SUPPLY PORT
B- BLEED PORT
L- LOADING PORT
A - SENSING PORT
INLET
TYPE PRX/120
PILOT TYPE PRX/125
PILOT
SS
FILTER FILTER
L
AA
B
B
INTERMEDIATE OUTLET
TYPE PRX/120
PILOT
S
L
A
B
M1001_05/2016
10
Type EZR

Connect the “A” port of upstream Type PRX-125 pilot
downstream of both regulators.
The pilot supply pressure connection for the
downstream Type EZR regulator must be directly
upstream of the Type EZR using intermediate pressure
and connected to the “S” port of the downstream
Type PRX-120. Install a Type 252 pilot supply lter
upstream of the pilot, if needed, to keep the supply
source from clogging the restrictor in the pilot. Inspect
and clean this lter regularly to make sure it has not
been plugged. Connect the loading port (Port L) of the
downstream Type PRX-120 pilot to the bonnet of the
downstream Type EZR regulator. Connect the “A” and
“B” ports of the downstream Type PRX-120 pilot to
downstream pressure.
Startup and Adjustment
Note
Table 10 shows the maximum inlet
and differential pressures for specic
constructions. Use pressure gauges to
monitor inlet pressure, outlet pressure
and any intermediate pressure
during startup.
CAUTION
To prevent damage to the Type PRX pilot
during startup, the sense and bleed lines
of the Type PRX should be located on the
same side of the downstream block valve.
Keep sense and bleed lines separate.
Startup for Both Single-Regulator and
Monitoring Installations
1. Make sure all block and vent valves are closed.
2. Back out the pilot adjusting screw(s).
3. For easy initial startup, set the restrictor to the “8”
position. For future startups, the restrictor can be
left in the desired run position.
4. SLOWLY OPEN the valves in the following order:
a. Pilot supply and control line valve(s), if used
b. Inlet block valve
c. Outlet block valve
5. For a 161 Series pilot with Type 112 restrictor,
turn the restrictor(s) to position “2” or to the
desired run position. For a PRX Series pilot, turn
the restrictor screw 1 turn counterclockwise from
fully seated (turn restrictor fully clockwise then
1 turn counterclockwise) and the damper screw
fully counterclockwise.
6. For a single regulator, set the pilot to the desired
outlet (control) pressure according to the pilot
adjustment procedure.
For a wide-open downstream monitor
installation, adjust the upstream working pilot until
intermediate pressure is higher than the desired
setpoint of the monitor pilot. Adjust the downstream
monitoring pilot to the desired monitoring takeover
pressure. Reduce the upstream pilot to the normal
outlet pressure setting.
For a wide-open upstream monitor installation,
adjust the downstream working pilot to a setpoint
higher than the setpoint of the monitor pilot.
Adjust the upstream monitoring pilot to the desired
monitor takeover pressure. Reduce the downstream
pilot setting to normal outlet pressure setting.
For a working monitor installation, turn out the
adjusting screw of the downstream pilot, removing
spring tension. Adjust the upstream working pilot
to the desired intermediate pressure setting.
Turn out the adjusting screw of the upstream
monitor pilot, removing spring tension. Turn in
the adjusting screw of the downstream pilot.
Adjust the upstream monitor pilot to the desired
setpoint taking into account the guidelines shown
in Table 9. Establish nal desired downstream
pressure by adjusting the downstream pilot.
Pilot Adjustment
For 161 Series pilots, remove the pilot closing cap
(key 16, Figure 19 or key 22, Figure 20) and, on
161EB Series only, loosen the locknut (key 12,
Figure 19). Turn the adjusting screw (key 11,
Figure 19 or key 35, Figure 20) into the spring case
(key 2, Figure 19 or key 3, Figure 20) to increase the
downstream pressure. Turn the adjusting screw out of
the spring case to decrease the downstream pressure.
Figure 6. Restrictor Adjustment
W4559_1
11
Type EZR

For PRX Series pilots (Figure 26), loosen locknut
(key 2) and turn the adjusting screw into the spring case
to increase (or out of the spring case to decrease) the
downstream pressure. When the required downstream
pressure is maintained for several minutes, tighten the
locknut to lock the adjusting screw in position
and replace the pilot closing cap.
The Restrictor and Damper screws on the PRX Series
pilot control the regulator’s proportional band (droop)
and speed of response. Table 7 includes the appropriate
settings for low ow operation. For additional tuning
follow the steps outlined below:
1. Start with the restrictor screw 1 turn
counterclockwise from fully seated (turn restrictor
fully clockwise then 1 turn counterclockwise) and
the damper screw fully counterclockwise.
2. Turn damper screw clockwise until desired
performance is achieved. This reduces the ow
path of the damper. If the damper becomes fully
seated (no longer able to turn clockwise) and the
desired performance has not been achieved, return
the damper screw to the fully counterclockwise position.
PILOT TYPE
RECOMMENDED TYPE 112
RESTRICTOR SETTINGS FOR LOW
FLOW OPERATION
RECOMMENDED ORIFICE SIZE(S)
FOR LOW FLOW OPERATION
TYPE 112 RESTRICTOR SETTINGS
AND ORIFICE SIZES TO AVOID AT
LOW FLOW
161AY Series Pilots Restrictor Setting of “5” or greater 3/32 or 1/8 in. / 2.38 or 3.18 mm
(3/32 in. / 2.38 mm is standard)
Avoid restrictor setting of “2” or less if
continuous ows are expected to be
less than 5% of maximum capacity
Note: Higher Type 112 restrictor settings will increase proportional band. Adjustment of the Type 112 restrictor will also cause a shift in setpoint. Setpoint should be checked and adjusted
following restrictor setting adjustment.
Table 6. Type 161AY/161AYM Pilot Adjustment Recommendations
Table 7. Type PRX Pilot Adjustment Recommendations
PILOT TYPE RECOMMENDED TYPE PRX RESTRICTOR AND DAMPER
SCREW SETTINGS FOR LOW FLOW OPERATION
TYPE PRX RESTRICTOR AND DAMPER SCREW
SETTINGS TO AVOID AT LOW FLOW
PRX/120 and PRX/120-AP Series
Restrictor Screw
- 1 turn out (counterclockwise) from fully seated for most
low ows
- 2-1/2 turns out (for ows less than
5% of maximum)
Damper Screw
- Fully out (counterclockwise) from seated for most
low ows
- One turn out (for ows less than 5% of maximum)
Restrictor Screw
- Fully seated (clockwise) or full out
(counterclockwise)
Damper Screw
- Full in (clockwise)
Note: Counterclockwise adjustment of the Type PRX restrictor screw will increase proportional band. Adjustment of the restrictor screw will also cause a shift in setpoint. Setpoint should
be checked and adjusted following restrictor screw adjustment.
Table 5. 161EB Series Pilot Adjustment Recommendations
PILOT TYPE RECOMMENDED TYPE 112 RESTRICTOR
SETTINGS FOR LOW FLOW OPERATION
TYPE 112 RESTRICTOR SETTINGS TO AVOID
AT LOW FLOW
161EB Series Pilots Restrictor Setting of “5” or greater
Avoid restrictor setting of “2” or less if continuous
ows are expected to be less than 5%
of maximum capacity
Note: Higher Type 112 restrictor settings will increase proportional band. Adjustment of the Type 112 restrictor will also cause a shift in setpoint. Setpoint should be checked and adjusted
following restrictor setting adjustment.
!
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.
3. Turn the restrictor screw an additional turn
counterclockwise from fully seated. This increases
the ow path of the restrictor. If additional tuning
is required, repeat step 2. Follow this method until
desired performance is achieved.
Type 112 Restrictor Adjustment
The Type 112 restrictor controls the regulator’s
proportional band (droop) and speed of response.
The restrictor can be used to ne tune the regulator
for maximum performance by decreasing the restrictor
setting for tighter control (increased opening speed,
decreased closing speed); or increasing the restrictor
setting for maximum stability (decreased opening speed,
increased closing speed). A lower setting also provides a
narrower proportional band for better accuracy.
12
Type EZR

17E68
NITRILE (NBR)
17E97(1)
NITRILE (NBR)
17E88
FLUOROCARBON (FKM)
Gas Temperature
(for lower temperatures
contact your local Sales Ofce)
-20 to 150°F / -29 to 66°C 0 to 150°F / -18 to 66°C 0 to 260°F / -18 to 127°C(2)
General Applications Best for cold temperatures.
Best for high pressure conditions, i.e.
transmission service or high pressure
industrial service. It is also the best for
abrasive or erosive service applications.
Best for natural gas having aromatic
hydrocarbons. It is also the best for high
temperature applications.
Heavy Particle Erosion Fair Excellent Good
Natural Gas With:
Up to 3% aromatic
hydrocarbon content(3) Good Excellent
Excellent
3 to 15% aromatic
hydrocarbon content(3) Poor Good
15 to 50% aromatic
hydrocarbon content(3) Not recommended Poor
Up to 3% H2S (hydrogen
sulde or sour gas) Good Good Good
Up to 3% ketone Fair Fair Fair
Up to 10% alcohol Good Good
Up to 3% synthetic lube Fair Fair Good
1. The NPS 6 / DN 150, 17E97 diaphragm will perform in gas temperatures as low as -20°F / -29°C.
2. For differential pressures above 400 psig / 27.6 bar diaphragm temperature is limited to 150°F / 66°C.
3. The aromatic hydrocarbon content is based on percent volume.
Table 8. Diaphragm Material Selection Information
MONITORING PILOT MINIMUM PRESSURE OVER NORMAL DISTRIBUTION
PRESSURE AT WHICH MONITOR PILOT CAN BE SET
WITH A RESTRICTOR SETTING OF 2
Construction Outlet (Control) Pressure Range Spring Part Number
Type 161AY or
161AYM
6 to 15 in. w.c.
0.5 to 1.2 psig
1.2 to 2.5 psig
2.5 to 4.5 psig
4.5 to 7 psig
15 to 37 mbar
34 to 83 mbar
83 mbar to 0.17 bar
0.17 to 0.31 bar
0.31 to 0.48 bar
1B653927022
1B537027052
1B537127022
1B537227022
1B537327052
1 in. w.c.
1 in. w.c.
0.5 psig
0.5 psig
0.5 psig
2 mbar(1)
2 mbar(1)
34 mbar(1)
34 mbar(1)
34 mbar(1)
Type 161EBM
5 to 15 psig
10 to 40 psig
30 to 75 psig
70 to 140 psig
130 to 200 psig
200 to 350 psig
0.34 to 1.0 bar
0.69 to 2.8 bar
2.1 to 5.2 bar
4.8 to 9.7 bar
9.0 to 13.8 bar
13.8 to 24.1 bar
17B1260X012
17B1262X012
17B1259X012
17B1261X012
17B1263X012
17B1264X012
0.5 psig
0.5 psig
0.6 psig
1.3 psig
1.5 psig
3 psig
34 mbar(1)
34 mbar(1)
41 mbar(1)
90 mbar(1)
0.10 bar(1)
0.21 bar(1)
Type 161EBHM 250 to 450 psig
400 to 700 psig
17.2 to 31.0 bar
27.6 to 48.3 bar
17B1263X012
17B1264X012
3.5 psig
7 psig
0.24 bar
0.48 bar
1. Monitor pilot minimum setpoint was determined with a pressure drop ranging from 50 to 150 psig / 3.5 to 10.3 bar. Approximately double the minimum monitor pilot setpoint.
Table 9. Type EZR Working Monitor Performance
The “8” position has the largest ow, is most stable and
easiest for startup, however, using the “8” position
is not necessary. The “0” setting has the smallest
(minimum) ow passage; at no point of rotation will the
Type 112 restrictor be completely shut off. After initial
adjustment, the restrictor does not need to be adjusted
for maintenance or startup.
Low Flow Application Considerations
For stable, low ow operation, other considerations
besides pilot settings should also be addressed.
Installation of an oversized regulator may make low ow
operation difcult. When possible, a smaller-sized
Type EZR should be installed. Reduced capacity trim
reduces relief valve requirements by decreasing the
maximum possible ow through the regulator but does
not improve low ow performance. During design of a
regulator installation, the downstream piping volume
should be maximized. Control lines should not be located
in or near piping sections that may experience turbulent
ow, such as elbows or swages. Larger diameter control
lines are also recommended in low ow conditions. The
larger control lines are less restrictive and will reduce pilot
exhaust bleed backpressure to the pilot that may cause
instability. Separate sense and exhaust lines may also
help at low ow conditions. This feature is provided on
the PRX Series, Types 161EBM, 161EBHM and 161AYM
pilots. Control line taps should be located in straight pipe;
several pipeline diameters (8 to 10 of largest piping on
outlet) downstream of the regulator. These guidelines
have been used to improve station stability at low ow.
13
Type EZR

Table 10. Main Valve Maximum Pressure Ratings, Diaphragm Selection Information and Main Spring Selection(1)
BODY SIZE
NPS / DN
DIAPHRAGM
MATERIAL
MAXIMUM
OPERATING INLET
PRESSURE(4)
MAXIMUM
OPERATING
DIFFERENTIAL
PRESSURE(4)
MAXIMUM
EMERGENCY INLET
AND DIFFERENTIAL
PRESSURE
MAIN SPRING
COLOR CODE
DIAPHRAGM
DESIGNATION
psig bar psid bar d psid bar d
1 and 1-1/4 x 1 /
25 and 32 x 25
17E68 Nitrile (NBR)
Low temperature
100 6.9 100 6.9 100 6.9 Light Blue
130
460 31.7 400 27.6 460 31.7 Black
17E97 Nitrile (NBR)
High pressure and/or erosion
resistance
500 34.5 500 34.5 1050 72.4 Black
1050 72.4 800 55.2 1050 72.4 Black with White
Stripe(2)
17E88 Fluorocarbon (FKM)
High aromatic hydrocarbon
content resistance
100 6.9 100 6.9 100 6.9 Light Blue
500 34.5 500 34.5(3) 750 51.7 Black
750 51.7 500 34.5(3) 750 51.7 Black with White
Stripe(2)
2 x 1 / 50 x 25
17E68 Nitrile (NBR)
Low temperature
100 6.9 100 6.9 100 6.9 Light Blue
360 24.8 300 20.7 360 24.8 Black with White
Stripe
17E97 Nitrile (NBR)
High pressure and/or erosion
resistance
500 34.5 500 34.5 500 34.5 Black with White
Stripe
1050 72.4 800 55.2 1050 72.4 Red Stripe(2)
17E88 Fluorocarbon (FKM)
High aromatic hydrocarbon
content resistance
100 6.9 100 6.9 100 6.9 Light Blue
750 51.7 500 34.5(3) 750 51.7 Black with White
Stripe
2 / 50
17E68 Nitrile (NBR)
Low temperature
100 6.9 100 6.9 100 6.9 Yellow
460 31.7 400 27.6 460 31.7 Green
17E97 Nitrile (NBR)
High pressure and/or erosion
resistance
500 34.5 500 34.5 1050 72.4 Green
1050 72.4 800 55.2 1050 72.4 Red(2) or Purple(2)
17E88 Fluorocarbon (FKM)
High aromatic hydrocarbon
content resistance
100 6.9 100 6.9 100 6.9 Yellow
500 34.5 500 34.5(3) 750 51.7 Green
750 51.7 500 34.5(3) 750 51.7 Red(2) or Purple(2)
3 / 80
17E68 Nitrile (NBR)
Low temperature
100 6.9 100 6.9 100 6.9 Yellow
360 24.8 300 20.7 500 34.5 Light Blue
17E97 Nitrile (NBR)
High pressure and/or
erosion resistance
500 34.5 500 34.5 1050 72.4 Light Blue
1050 72.4 800 55.2 1050 72.4 Black(2)
17E88 Fluorocarbon (FKM)
High aromatic hydrocarbon
content resistance
100 6.9 100 6.9 100 6.9 Yellow
500 34.5 500 34.5(3) 750 51.7 Light Blue
750 51.7 500 34.5(3) 750 51.7 Black(2)
4, 6 x 4
and 8 x 4 /
100, 150 x 100
and 200 x 100
17E68 Nitrile (NBR)
Low temperature
100 6.9 100 6.9 100 6.9 Yellow
360 24.8 300 20.7 500 34.5 Green
17E97 Nitrile (NBR)
High pressure and/or
erosion resistance
500 34.5 500 34.5 1050 72.4 Green
1050 72.4 800 55.2 1050 72.4 Red(2)
17E88 Fluorocarbon (FKM)
High aromatic hydrocarbon
content resistance
100 6.9 100 6.9 100 6.9 Yellow
500 34.5 500 34.5(3) 750 51.7 Green
750 51.7 500 34.5(3) 750 51.7 Red(2)
6, 8 x 6
and 12 x 6 /
150, 200 x 150
and 300 x 150
17E97 Nitrile (NBR)
High pressure and/or
erosion resistance
100 6.9 100 6.9 100 6.9 Yellow
500 34.5 500 34.5 1050 72.4 Green
1050 72.4 800 55.2 1050 72.4 Red(2)
17E88 Fluorocarbon (FKM)
High aromatic hydrocarbon
content resistance
100 6.9 100 6.9 100 6.9 Yellow
500 34.5 500 34.5(3) 750 51.7 Green
750 51.7 500 34.5(3) 750 51.7 Red(2)
8 / 200
17E97 Nitrile (NBR)
High pressure and/or
erosion resistance
100 6.9 100 6.9 100 6.9 Yellow
500 34.5 500 34.5 1050 72.4 Green
1050 72.4 800 55.2 1050 72.4 Red(2)
1. See Table 1 for main valve structural design ratings and Table 3 for pilot ratings.
2. The red, black, purple, red stripe and black with white stripe springs are only recommended for applications where the maximum inlet pressure can exceed 500 psig / 34.5 bar.
3. For differential pressures above 400 psid / 27.6 bar d diaphragm temperatures are limited to 150°F / 66°C.
4. These are recommendations that provide the best regulator performance for a typical application. Please contact your local Sales Ofce for further information if a deviation from the
standard recommendations is required.
14
Type EZR

TYPE 161AY TYPE 161AYM
CONTROL LINE CONNECTION:
1/2 NPT PRESSURE
REGISTRATION ONLY. USE
3/8 NPT O.D. TUBING OR LARGER
FOR CONTROL LINE.
PILOT BLEED (EXHAUST)
CONNECTION: 3/4 NPT. USE
1/2 NPT PIPE MINIMUM FOR BLEED
(EXHAUST) LINE.
CONTROL LINE CONNECTION:
3/4 NPT PRESSURE
REGISTRATION AND PILOT
BLEED (EXHAUST). USE
3/4 NPT PIPE MINIMUM FOR
CONTROL LINE.
INLET 3/4 NPT
CONNECTS
TO 1/4 NPT
TYPE 112 OUTLET
INLET 3/4 NPT CONNECTS
TO 1/4 NPT TYPE 112 OUTLET
B2609
TYPE 112
PILOT SUPPLY CONNECTION: 1/4 NPT PIPE
CONNECTS TO UPSTREAM PILOT SUPPLY TAP
LOADING CONNECTION: 1/4 NPT PIPE CONNECTS TO
TYPE EZR DIAPHRAGM LOADING PORT
OUTLET CONNECTION: 1/4 NPT PIPE
CONNECTS TO PILOT INLET CONNECTION
OPTIONAL LOADING CONNECTION:
1/4 NPT NORMALLY PLUGGED
11B5004-A
Figure 7. Pilot Port Function and Connection Sizes
TYPES 161EB AND 161EBH TYPES 161EBM AND 161EBHM
IN
OUT
IN
OUT
SENSE
1/4 NPT
NORMALLY PLUGGED
INLET 1/4 NPT
CONNECTS
TO 1/4 NPT
TYPE 112 OUTLET
CONTROL LINE CONNECTION:
1/4 NPT PRESSURE
REGISTRATION AND PILOT BLEED
(EXHAUST). USE 3/8 NPT
O.D. TUBING LARGER FOR
CONTROL LINE.
INLET 1/4 NPT
CONNECTS
TO 1/4 NPT
TYPE 112 OUTLET
CONTROL LINE CONNECTION:
1/4 NPT PRESSURE
REGISTRATION ONLY. USE
3/8 NPT O.D. TUBING OR LARGER
FOR CONTROL LINE.
PILOT BLEED (EXHAUST)
CONNECTION: 1/4 NPT. USE 3/8 NPT
O.D. TUBING OR LARGER FOR BLEED
(EXHAUST) LINE.
21B5005-A
15
Type EZR

Shutdown for Both Single-Regulator and
Monitoring Installations
!
WARNING
If pilot supply pressure is shut down
rst, the downstream system may be
subjected to full inlet pressure.
1. If the pilot setting must be disturbed, be sure to
keep some tension on the spring. This will prevent
trapping inlet pressure during blow down.
2. Close the valves shown in Figure 3 or 4, in the
following order:
a. Inlet block valve
b. Outlet block valve
c. Control line valve(s), if used
3. Open the vent valves to depressurize the system.
Maintenance
Regulator parts are subject to normal wear and
must be inspected periodically and replaced as
necessary. Due to the care Emerson takes in meeting
all manufacturing requirements (heat treating,
dimensional tolerances, etc.), use only replacement
parts manufactured or furnished by Emerson. Also,
when lubrication is required, use a good quality
lubricant and sparingly coat the recommended part.
The frequency of inspection and parts replacement
depends upon the severity of service conditions,
applicable codes and government regulations and
company inspection procedures. Table 12 lists various
regulator problems and possible solutions for them.
Type EZR Main Valve Trim Parts
Instructions are given for complete disassembly and
assembly. The main valve body may remain in the
pipeline during maintenance procedures. Key numbers
are referenced in Figures 14 through 18.
CAUTION
Avoid personal injury or damage to
property from sudden release of pressure
or uncontrolled gas or other process
uid. Before starting to disassemble,
carefully release all pressures according
to the Shutdown procedure. Use gauges
to monitor inlet and outlet pressures
while releasing these pressures.
Converting a Fisher™ E-Body to Type EZR
Remove all trim parts from the main valve and clean
the body interior. Then follow procedure in Assembly
section to convert a Fisher E-body to a Type EZR.
CAUTION
When installing a Type EZR trim package
make sure ow is up through the center
of the cage and down through the cage
slots. In some cases, correct ow path
is achieved by removing the body from
the line and turning it around. If this is
done, change the ow arrow to indicate
the correct direction. Damage may result
STYLE MATERIAL DIAPHRAGM MATERIAL
Imprint Ink Mark Imprint Ink Mark
2 130
2 17E68 17E68 - Nitrile (NBR)
(low temperature)
4 17E88
17E88 - Fluorocarbon (FKM)
(high aromatic hydrocarbon
content resistance)
5 17E97
17E97 - Nitrile (NBR)
(high pressure and/or
erosion resistance)
Table 11. Diaphragm Imprint Codes
1
1
1
1
1
1
11
Figure 8. Diaphragm Markings
LOCATE INK CODE
BETWEEN RADII
MATERIAL
INK CODE
MANUFACTURER
CODE
THICKNESS INK
CODE (USE ONE
LOCATION ONLY)
DOME IDENTIFICATION
ELASTOMER/FABRIC
MATERIAL CODE
THICKNESS
CODE
YEAR OF MANUFACTURE
RADIAL LOCATION
TO LOCATE
IMPRINT CODE
16
Type EZR

if ow is not in the correct direction. After
assembly, check the regulator for shutoff
and leakage to atmosphere.
Disassembly
Disassembly of Type EZR
1. Shutdown, isolate and depressurize the main
valve and pilot.
2. Remove travel indicator assembly or travel
indicator plug assembly using the Travel Indicator
Assembly Maintenance section.
3. Remove the cap screws (key 3). Lift up and
remove the bonnet (key 2) from the body (key 1).
Note
For the NPS 8 / DN 200 body, the
lifting ange (key 143) is capable
of supporting the full weight of the
regulator assembly and can be utilized
to lift bonnet if required.
4. Remove the diaphragm and plug assembly (key 9)
and bonnet O-ring (key 28). For NPS 2 x 1 /
DN 50 x 25 sizes, use a screwdriver to remove the
upper adaptor (key 131).
5. Pull out the cage (key 7), O-ring (key 8) and inlet
strainer or strainer shim (key 23) (if no strainer).
For NPS 2 x 1 / DN 50 x 25 sizes, remove the
lower adaptor (key 132).
6. Clean parts and replace if necessary. To change
the O-ring (key 121) on a 6 in. / 152 mm cage with
attached restrictor plate (key 71), remove cap screws
(key 126).
Assembly
1. Install the inlet strainer or shim (key 23) into the
body (key 1).
Note
When installing in a vertical orientation,
apply lubricant to the bottom of the inlet
strainer or strainer shim (key 23) to help
hold parts in place while installing cage.
2. Lightly lubricate and install the cage O-ring (key 8).
3. Apply lubricant lightly to all O-rings or the mating
part before installing them.
4. Install the cage (key 7) and lightly lubricate and
install the bonnet O-ring (key 28).
PROBLEM POSSIBLE SOLUTION
Outlet pressure suddenly rises above
setpoint and approaches inlet pressure
• If travel indicator is in UP position, check restrictor and pilot supply lter for plugging
• If travel indicator is in DOWN position, check main valve for debris or diaphragm damage
Outlet pressure normal at low ow but
falls below setpoint at high ow
• Check main valve inlet strainer for plugging
• Check inlet pressure at high ow condition
• Check sizing calculations to be sure main valve body is large enough for load
• Check for undersized or restricted control line (use the minimum size given in step 6 of All Installations of the
Type EZR Installation section).
• Adjust restrictor to a lower setting
Outlet pressure cycles
• Adjust restrictor to a higher setting
• Check control line placement. Make sure it is not located in a turbulent area.
• Make sure there is not a restriction in the control line, such as a needle valve.
Gas escapes from pilot spring case • Replace pilot diaphragm assembly
Gas escapes from travel indicator • Replace indicator stem O-ring, if indicator is not desired, convert to a non-travel indicator assembly
Regulator unexpectedly closes or falls
below setpoint
• Check pilot for ice. Moisture in the gas can cause ice to form and build up in the pilot, blocking the ow.
Heating the regulator or adding a de-icing agent will reduce the possibility of icing.
Outlet pressure approaches inlet
pressure when no ow is desired
• Check main valve O-rings for damage or improper installation
• Check cage and diaphragm surfaces for erosion or trapped debris
• Check pilot valve plug and seat for seating surface damage or debris
• Check pilot for ice
Regulator will not open
• Check for clogged control line
• Make sure control line is installed and open
• Check for damage to the main valve diaphragm
• On new installations, make sure the control line and pilot supply are properly connected
Regulator will not close
• Make sure the pilot supply is properly connected
• Check restrictor for clogging
• Check the main valve diaphragm for damage
• Check for a broken control line
High lock-up pressure with slow shutdown • Check for debris on main valve or pilot seat
High lock-up pressure with fast shutdown • Adjust restrictor to a higher setting
Note: If you were unable to solve your problem using this troubleshooting guide, contact your local Sales Ofce.
Table 12. Troubleshooting Guide
17
Type EZR

To assemble a 6 in. / 152 mm cage with attached
restrictor plate (key 71), lightly lubricate the O-ring
(key 121) and place it on the restrictor plate.
Secure the cage to the restrictor plate with the
cap screws (key 126), using a torque of 10 to
12 ft-lbs / 14 to 16 N•m.
For NPS 2 x 1 / DN 50 x 25 sizes, the lower
adaptor (key 132) must be assembled on the cage
before placing in the body. Lightly lubricate the
lower adaptor O-rings (keys 121 and 67) and place
the lower adaptor on a at surface. Then press the
cage down into the lower adaptor.
5. Lubricate the top and bottom of the outer
edge (bead area) of the diaphragm and place
diaphragm and plug assembly (key 9) on the
cage (key 7) making sure the bead is in the cage
groove. Lubricate the top plug (key 5) recess. For
NPS 2 x 1 / DN 50 x 25 sizes, the upper adaptor
(key 131) must be placed on the cage before the
bonnet (key 2). Lightly lubricate the upper adaptor
O-ring (key 133) and then press the upper adaptor
onto the cage.
6. Prior to installing the travel indicator or travel indicator
plug, install the bonnet (key 2) in proper orientation.
CAUTION
Make sure to use a Type EZR
bonnet. The Type EZR bonnet is NOT
interchangeable with other Fisher™
E-body bonnets. Installing an improper
bonnet can result in stem assembly
breakage and unit failure. The bonnet
can be identied by the Type EZR
markings on the top.
7. Lubricate cap screws (key 3) and secure the
bonnet (key 2), using an even crisscross pattern. It
may be necessary to push down on bonnet to start
cap screws. Tighten cap screws to proper torque
(see Table 13).
8. Lightly lubricate the travel indicator assembly
threads and install the indicator tting (key 19) into
the bonnet (key 2, Figure 14), tighten to the proper
torque (see Table 13).
Diaphragm and Plug
Assembly Maintenance
The diaphragm and plug assembly can be
replaced as a single unit (a diaphragm cartridge) or
individual components within the assembly can be
replaced. When replacing individual components,
inspect each component for damage and wear
and replace parts as needed. Key numbers for the
following assembly and disassembly procedure are
referenced in Figures 9 and 14.
1. Place a screwdriver or similar tool through the hole
in the top plug (key 5).
2. Remove the anged locknut (key 13) from
the bottom plug (key 11). This loosens the
entire assembly.
Note
On NPS 1, 1-1/4 x 1 and 2 x 1 / DN 25,
32 x 25 and 50 x 25 bodies, remove the
socket head screw (key 129) and lock
washer (key 130) from the bottom plug.
3. Remove the bottom plug (key 11) and the bottom
plug O-ring (key 10).
4. Remove the diaphragm (key 9).
5. Remove the top plug O-rings (keys 14 and 70).
6. Check all components for damage or wear and
replace as necessary.
7. When reassembling, be sure to lubricate all O-rings
before installing.
8. Hold the top plug (key 5). Place the parts on the top
plug in the following order:
Figure 9. Diaphragm and Plug Assembly Components
FLANGED
LOCKNUT
(KEY 13)
BOTTOM PLUG
(KEY 11)
DIAPHRAGM
(KEY 9)
O-RING
(KEY 14)
TOP PLUG
(KEY 5)
O-RING
(KEY 70)
O-RING
(KEY 10)
18
Type EZR

• O-ring (key 14)
• O-ring (key 70)
• Diaphragm (key 9)
• O-ring (key10)
• Bottom Plug (key 11)
• Flanged Locknut (key 13)
9. Reassemble in the reverse order. Tighten ange
locknut (key 13) to proper torque (see Table 13).
Travel Indicator Assembly Maintenance
Travel indicator assembly key numbers are referenced
in Figures 10, 14 and 18. The indicator assembly
can be removed and installed without removing the
bonnet (key 2) from the body (key 1). Travel indicator
maintenance is performed for two reasons:
a. When damaged or worn parts need replacing.
b. When travel indicator is removed and replaced
with a travel indicator plug assembly.
!
WARNING
Avoid personal injury or damage
to property from sudden release
of pressure or uncontrolled gas or
other process uid. Before starting
to disassemble, carefully release all
pressures according to the shutdown
procedure. Use gauges to monitor inlet,
loading and outlet pressures while
releasing these pressures.
1. Remove the indicator protector (key 22, Figure 14)
and indicator cover (key 21).
2. Remove the rst hex nut (key 4) and the indicator
washer (key 20).
3. Unscrew the second hex nut (key 4) on the top
of the indicator stem (key 15). Do not remove.
4. Use a wrench to remove indicator tting
(key 19).
5. Lift out travel indicator assembly. If replacing travel
indicator with travel indicator plug, skip to step 9.
6. Compress the main spring (key 12). Remove
the second hex nut (key 4). Parts will separate
easily when the hex nut is removed.
7. Slide the indicator stem (key 15) out of the
indicator tting (key 19). The main spring (key 12)
and upper spring seat (key 17) will be free.
8. If necessary, use the indicator stem (key 15) to pry
the back-up rings (key 16) and O-ring (key 18) out
of the indicator tting (key 19).
BODY SIZE, NPS / DN TORQUE, FT-LBS / N•m
Cap Screw Flange Locknut Indicator Fitting Indicator Plug
1 or 1-1/4 x 1 / 25 or 32 x 25 75 to 95 / 102 to 129 4 to 6 / 5.4 to 8.1 90 to 160 / 122 to 217 90 to 160 / 122 to 217
2 x 1 or 2 / 50 x 25 or 50 55 to 70 / 75 to 95 6 to 8 / 8.1 to 11 90 to 160 / 122 to 217 90 to 160 / 122 to 217
3 / 80 100 to 130 / 136 to 176 19 to 25 / 26 to 34 200 to 300 / 271 to 407 200 to 300 / 271 to 407
4, 6 x 4 or 8 x 4 /
100, 150 x 100 or 200 x 100 160 to 210 / 217 to 285 19 to 25 / 26 to 34 200 to 300 / 271 to 407 200 to 300 / 271 to 407
6, 8 x 6 or 12 x 6 /
150, 200 x 150 or 300 x 150 275 to 300 / 373 to 407 50 to 100 / 68 to 136 300 to 425 / 407 to 577 300 to 425 / 407 to 577
8 / 200 400 to 450 / 542 to 610 90 to 110 / 122 to 149 300 to 425 / 407 to 577 300 to 425 / 407 to 577
Table 13. Torque Values
Figure 10. Travel Indicator Parts
INDICATOR COVER
(KEY 21)
HEX NUTS
(KEY 4)
INDICATOR FITTING
(KEY 19)
O-RING
(KEY 18)
UPPER SPRING
SEAT (KEY 17)
MAIN SPRING
(KEY 12)
INDICATOR STEM
(KEY 15)
WASHER (KEY 79)
(NPS 6 / DN 150 SIZE ONLY)
BACK-UP
RINGS
(KEY 16)
INDICATOR
O-RING (KEY 6)
INDICATOR
WASHER (KEY 20)
19
Type EZR

9. Check the indicator tting O-ring (key 6). Lubricate
and replace if necessary.
10. To replace travel indicator parts, lubricate
all O-rings, back-up rings and threads. To
reassemble, hold the indicator stem (key 15) and
place the parts on the stem in the following order
(see Figure 10).
• Washer (key 79 for NPS 6 / DN 150 size only)
• Main Spring (key 12), small end rst
• Upper Spring Seat (key 17), make sure to place
the large end toward the spring
• First Back-up Ring (key 16)
• O-ring (key 18)
• Second Back-up Ring (key 16)
• Indicator Fitting (key 19), the back-up rings
(key 16) and O-ring (key 18) should slide into
the indicator tting and the small end of the
upper spring seat (key 17) should slide into the
indicator tting.
• First Hex Nut (key 4)
• Indicator Washer (key 20)
• Second Hex Nut (key 4)
11. Install the indicator tting (key 19) into the bonnet
(key 2, Figure 14), tighten to the proper torque (see
Table 13).
To set the travel indicator, hold the indicator cover
(key 21) next to the indicator tting (key 19).
Screw the hex nuts (key 4) and the indicator
washer (key 20) down on the indicator stem
(key 15) until the washer is even with the lowest
marking on the indicator cover. Lightly lubricate
the indicator cover threads and install. Replace the
indicator protector (key 22).
To replace the travel indicator with the non-travel
indicator option, place the main spring (key 12) into
the bonnet. Install the indicator plug (key 19) and
tighten to proper torque (see Table 13).
161EB Series Pilots (Figure 19)
Note
This procedure covers all 161EB Series
pilots. Types 161EB and 161EBM rated
for outlet pressure settings over
200 psig / 13.8 bar require a diaphragm
limiter. Types 161EB and 161EBM pilots
rated for outlet pressure settings under
200 psig / 13.8 bar do not require a
diaphragm limiter.
Trim Parts
1. As shown in Figure 11, remove the body plug
(key 3) to let the plug spring (key 6) and valve plug
(key 4) drop freely from the body.
2. Inspect the removed parts and body plug O-ring
(key 15), replace as necessary and make sure the
plug seating surfaces are free from debris.
3. Sparingly apply lubricant to the body plug O-ring
(key 15) and the threads of the body plug (key 3).
Install the body plug O-ring over the body plug.
4. Stack the plug spring (key 6) and valve plug
(key 4) on the body plug (key 3). Install the body
plug with stacked parts into the body (key 1).
Diaphragm Parts
1. Remove the closing cap (key 16), loosen the
locknut (key 12) and back out the adjusting screw
(key 11) until compression is removed from the
control spring (key 9).
2. Remove the machine screws (key 13, not shown)
and separate the spring case (key 2) from the
body (key 1). Remove the control spring seat
(key 8), the control spring (key 9). If used, remove
the diaphragm limiter (key 10) and inspect the
diaphragm limiter O-ring (key 23). Replace
if necessary.
3. Remove the diaphragm assembly (key 7) and
inspect the diaphragm.
4. On Types 161EBM and 161EBHM pilots, inspect
the stem guide seal assembly (key 19) and, if
damaged, replace the complete assembly. Inspect
the outer O-ring (key 22) and replace if necessary.
5. Install the diaphragm assembly (key 7) and push
down on it to see if the valve plug (key 4) strokes
smoothly and approximately 1/16 in. / 1.6 mm.
Figure 11. 161EB Series Pilot Trim Removal/Installation
20
Type EZR