Emerson EZH Series User manual

D103077X014
Installation Guide
English – June 2015 EZH and EZHSO Series
www.sherregulators.com
Introduction
This installation guide provides instructions for
installation, startup, and adjustment. To receive a copy
of the instruction manual, contact your local Sales
Ofce or view a copy at www.sherregulators.com. For
further information refer to: EZH and EZHSO Series
Pressure Reducing Regulators Instruction
Manual, D103077X012.
P.E.D. Categories
This product may be used as a pressure accessory
with pressure equipment in the following Pressure
Equipment Directive 97/23/EC categories. It may
also be used outside of the Pressure Equipment
Directive using sound engineering practice (SEP) per
table below.
TYPE PRODUCT SIZE BODY MATERIAL CATEGORY
EZH DN 25, 50, 80 and 100 /
NPS 1, 2, 3 and 4 WCC Steel IV
EZHSO DN 25, 50 and 80 /
NPS 1, 2 and 3 WCC Steel IV
EZHOSX DN 25, 50, 80 and 100 /
NPS 1, 2, 3 and 4 LCC Steel IV
EZHSO-OSX DN 25, 50 and 80 /
NPS 1, 2 and 3 LCC Steel IV
Specications
Available Congurations
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)
103 bar / 1500 psig
Maximum Emergency (Design Casing Pressure)(1)
103 bar / 1500 psig
Maximum Operating Differential Pressure(1)(4)
Main Valve: 103 bar d / 1500 psid
Pilot: Between loading pressure in pilot and
loading sense pressure: 85.0 bar d / 1233 psid
Outlet Pressure
See Table 2
Minimum Differential Pressures(1)(2)
SERIES
MAIN VALVE
BODY SIZE
MINIMUM DIFFERENTIAL
For 90% Capacity For 100% Capacity
DN NPS bar d psid bar d psid
EZH
25 1 1.1 15.2 1.1 15.7
50 2 0.83 12.0 0.95 13.8
80 3 0.73 10.6 0.88 12.8
100 4 1.1 15.8 1.1 16.4
EZHSO
25 1
3.8 55 3.8 55
50 2
80 3
100 4
Pressure Registration
External
Pilot Connections
1/4 NPT
Temperature Capabilities(1)
Nitrile (NBR) Version:
-29 to 82ºC / -20 to 180ºF
Fluorocarbon (FKM) Version:
-18 to 82ºC / 0 to 180ºF(3)
Polyurethane (PU) Version:
DN 25 to 50 / NPS 1 to 2 Sizes:
-30 to 82°C / -22 to 180°F
DN 80 to 100 / NPS 3 to 4 Sizes:
-20 to 82°C / -4 to 180°F
Installation
!
WARNING
Only qualied personnel shall install
or service a regulator. Regulators
should be installed, operated and
maintained in accordance with
international and applicable codes
and regulations and Emerson Process
Management Regulator Technologies,
Inc. instructions.
If the regulator vents uid or a
leak develops in the system, it
indicates that service is required.
Failure to take the regulator out of
service immediately may create a
hazardous condition.
Personal injury, equipment damage
or leakage due to escaping uid
or bursting of pressure containing
parts may result if this regulator is
1. The pressure/temperature limits in this Installation Guide and any applicable standard or code limitation should not be exceeded.
2. When using a Type SA/2 pilot supply lter regulator, the differential pressure across the regulator must be a least 3.1 bar d / 45 psid for optimum regulator performance.
3. Types PRX and SA/2 Fluorocarbon (FKM) elastomer is limited to -18°C / 0°F.
4. Maximum Operating Differential Pressure is 96.5 bar d / 1400 psid for DN 25 / NPS 1 EZHSO Series.

2
EZH and EZHSO Series
overpressured or is installed where
service conditions could exceed the
limits given in the Specications
section 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 result in personal
injury and property damage due to
escaping uid. To avoid such injury
and damage, install the regulator in a
safe location.
Clean out all pipelines before installation of the
regulator and check to be sure the regulator has
not been damaged or has collected foreign material
during shipping. For NPT bodies, apply pipe
compound to the external pipe threads. For anged
bodies, use suitable line gaskets and approved
piping and bolting practices. Install the regulator in
any position desired, unless otherwise specied,
but be sure ow through the body is in the direction
indicated by the arrow on the body.
Note
It is important that the regulator be
installed so that the vent hole in the
spring case is unobstructed at all
times. For outdoor installations, the
regulator should be located away
from vehicular trafc and positioned
so that water, ice and other foreign
materials cannot enter the spring
case through the vent. Avoid placing
the regulator beneath eaves or
downspouts and be sure it is above
the probable snow level.
Overpressure Protection
The recommended pressure limitations are
stamped on the regulator nameplate. Some type of
overpressure protection is needed if the actual inlet
pressure exceeds the maximum operating outlet
pressure rating. Overpressure protection should
also be provided if the regulator inlet pressure
is greater than the safe working pressure of the
downstream equipment.
Regulator operation below the maximum pressure
limitations does not preclude the possibility of
damage from external sources or debris in the line.
The regulator should be inspected for damage after
any overpressure condition.
Startup
The regulator is factory set at approximately
the midpoint of the spring range or the pressure
requested, so an initial adjustment may be required
to give the desired results. With proper installation
completed and relief valves properly adjusted,
slowly open the upstream and downstream
shutoff valves.
Adjustment
The adjustment of setpoint is performed using
the pilot adjusting screw. To change the outlet
pressure, loosen the jam nut and turn the adjusting
screw clockwise to increase outlet pressure or
counterclockwise to decrease it. Monitor the outlet
pressure with a test gauge during the adjustment.
Tighten the jam nut to maintain the desired setting.
Taking Out of Service (Shutdown)
!
WARNING
To avoid personal injury resulting from sudden
release of pressure, isolate the regulator from all
pressure before attempting disassembly.
Parts List
EZH and EZHSO Series Main Valve
(Figures 1 and 2)
Key Description
1 Body
2 Seat Ring
3(1) Cage
4* Anti-Friction Ring (2 required)
DN 25, 50 and 80 / NPS 1, 2 and 3 Bodies only
5 Actuator Lower Casing
6 Cap Screws
DN 25 / NPS 1 Body (4 required)
DN 50, 80 and 100 / NPS 2, 3 and 4 Body (8 required)
7* O-ring
8* Anti-Friction Rings (4 required)
9* O-ring (2 required)
10 Pipe Plug
11 Actuator Upper Casing
13 Spring
EZH Series
DN 25, 50 and 80 / NPS 1, 2 and 3 Body
DN 100 / NPS 4 Body(2)
EZHSO Series(2)
14 Sleeve
EZH Series
DN 25, 50 and 80 / NPS 1, 2 and 3 Body
DN 100 / NPS 4 Body(2)
EZHSO Series(2)
15* O-ring
16 Socket Head Cap Screw
DN 25 and 50 / NPS 1 and 2 Body (6 required)
DN 80 / NPS 3 Body (12 required)
DN 100 / NPS 4 Body (8 required)
17* O-ring
18 Inlet Plate
19 Outlet Plate
20* Diaphragm
21 Cap Screw
DN 25, 50 and 80 / NPS 1, 2 and 3 Body
(14 required for EZH Series, 16 required for EZHSO Series)
DN 100 / NPS 4 Body (16 required)
22 Plain Washer (16 required)
23 Hex Nut (16 required)
*Recommended spare part
1. When retrotting an EZH Series with pins with the new cage, it is also necessary to order the Seat Ring.
2. Parts are not orderable. See sleeve subassembly in Instruction Manual if it needs to be replaced.

3
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
DN NPS bar psig
25 1
WCC Steel
NPT or SWE 103 1500
CL150 RF 20.0 290
CL300 RF 51.7 750
CL600 RF or BWE 103 1500
50 2
NPT or SWE 103 1500
CL150 RF 20.0 290
CL300 RF 51.7 750
CL600 RF or BWE 103 1500
80 3
CL150 RF 20.0 290
CL300 RF 51.7 750
CL600 RF or BWE 103 1500
100 4
CL150 RF 20.0 290
CL300 RF 51.7 750
CL600 RF or BWE 103 1500
Table 2. Outlet Pressure Ranges
TYPE OUTLET PRESSURE RANGE AC (ACCURACY CLASS) PILOT CONTROL SPRING INFORMATION
bar psig EZH Series EZHSO Series Spring Color Part Number
PRX/120
PRX/125
1.00 to 1.8
1.6 to 3.0
2.8 to 5.5
5.0 to 8.5
14.5 to 26
23 to 44
41 to 80
73 to 123
2.5% 2.5%
Yellow
Green
Blue
Black
M0255240X12
M0255230X12
M0255180X12
M0255220X12
8.0 to 14.5
14.0 to 23.0
22.0 to 30.0
116 to 210
203 to 334
319 to 435
1% 2.5%
Silver
Gold
Aluminum
M0255210X12
M0255200X12
M0255860X12
PRX/120-AP
PRX/125-AP 30.0 to 80.0 435 to 1160 1% 2.5% Clear M0273790X12
24 Continuous Thread Stud Bolt
DN 25, 50 and 80 / NPS 1, 2 and 3 Bodies only
DN 25 / NPS 1 Body (4 required)
DN 50 / NPS 2 Body (6 required)
DN 80 / NPS 3 Body (4 required)
25 Intermediate Flange
DN 25, 50 and 80 / NPS 1, 2 and 3 Bodies only
26 Hex Nut
DN 25, 50 and 80 / NPS 1, 2 and 3 Bodies only
DN 25 / NPS 1 Body (4 required)
DN 50 / NPS 2 Body (6 required)
DN 80 / NPS 3 Body (4 required)
27 Sleeve Adaptor
EZH Series
DN 25, 50 and 80 / NPS 1, 2 and 3 Body
DN 100 / NPS 4 Body(2)
EZHSO Series(2)
28* O-ring
DN 25, 50 and 80 / NPS 1, 2 and 3 Bodies only(3)
29* O-ring(3)
30* Disk Holder Assembly
31 Disk Retainer
32 Lock Washer, EZH Series only
DN 25 / NPS 1 Body (1 required)
DN 50 / NPS 2 Body (2 required)
DN 80 / NPS 3 Body (3 required)
DN 100 / NPS 4 Body (4 required)
33 Socket Head Cap Screw, EZH Series only
DN 25 / NPS 1 Body (1 required)
DN 50 / NPS 2 Body (2 required)
DN 80 / NPS 3 Body (3 required)
DN 100 / NPS 4 Body (4 required)
34* O-ring
35 Bracket or Eyebolt (2 required)
36 Nameplate
37 Drive Screw (2 required)
38 Travel Indicator Plug
39 Long Bolt (2 required) EZH Series
DN 25, 50 and 80 / NPS 1, 2 and 3 Bodies only
43 Caution/Warning Label
DN 25, 50 and 80 / NPS 1, 2 and 3 Bodies (2 required)
DN 100 / NPS 4 Body (1 required)
44 Adjusting Screw Cap
59 Flow Arrow
60 Protective Cap (2 required)
DN 25, 50 and 80 / NPS 1, 2 and 3 Bodies only
61 Sleeve Guide, DN 100 / NPS 4 Body only
62* O-ring, DN 25, 50 and 80 / NPS 1, 2 and 3 Bodies only
63* O-ring
64* O-ring
66 Socket Head Set Screw
DN 100 / NPS 4 Body Only (8 required)
67 Crush Washer
DN 100 / NPS 4 Body Only (8 required)
68 Special Screw
DN 100 / NPS 4 Body Only (8 required)
69* O-ring
70 Cap, DN 100 / NPS 4 Body Only
71* O-ring
72 Locking Nut
EZH Series, DN 100 / NPS 4 Body only(4)
73 Upper Spring Seat, EZH Series only
DN 100 / NPS 4 Body only(4)
74 Hex Socket Cap Screw
DN 100 / NPS 4 Body only
75* O-ring
77 Screw, DN 100 / NPS 4 Body only (8 required)
78 Cage(1), DN 100 / NPS 4 Body only
82 Lower Spring Seat, EZH Series only
DN 100 / NPS 4 Body only(4)
83 Ball Bearing (2 required)
DN 100 / NPS 4 Body only(4)
138 Travel Indicator Cover
139 Travel Indicator Stem
140 Indicator Bushing
141 Travel Indicator Fitting
142A* O-ring
142B* O-ring
143* O-ring
144 Spring Collet
145 Retaining Ring
146 Protective Cap (EZHSO Series only)(4)
147 Stem (EZHSO Series only)(4)
148 Upper Spring Seat (EZHSO Series only)(4)
149 Lower Spring Seat (EZHSO Series only)(4)
150 Ring Guide (EZHSO Series only)(4)
151 Stem Nut (2 required)(4), EZHSO Series only
152 Hex Nut
(DN 50, 80 and 100 / NPS 2, 3 and 4(4)
Bodies EZHSO Series only)
*Recommended spare part
2. Parts are not orderable. See sleeve subassembly in Instruction Manual if it needs to be replaced.
3. Included also in EZHSO Series sleeve subassembly (DN 25, 50 and 80 / NPS 1, 2 and 3 ).
4. Included also in sleeve subassembly.
Key Description Key Description

4
EZH and EZHSO Series
49 External Tube Connector (2 required)
50 Pipe Tee
51 Pipe Cross
52 Tubing
53 90° NPT Pipe Elbow
54 Pipe Nipple
55 Internal Connector
PRX Series Pilots (Figure 6)
Key Description
1 Adjusting Screw
2 Locknut
3 Cap
4* Upper Cover O-ring
5* O-ring
6 Upper Spring Seat
7 Spring
8 Upper Cover
9 Lower Spring Seat
10 Machine Screw
11 Washer
12 Filter
13 Upper Diaphragm Plate
14* Diaphragm
15 Lower Diaphragm Plate
16 Body
17* Orice O-ring
18* Lower Cover O-ring
19 Orice
20 Nut
21 Lower Cover
22* Pad Holder
23 Stem
24 Nameplate
25* Stem O-ring
26 Upper Diaphragm Nut
27 Damper Adjusting Screw with Hole
28* Restrictor/Damper O-ring
29 Damper/Restrictor Plate
30 Ring Nut
31 Nameplate Screw
32 Restrictor Adjusting Screw with Hole
33 Plug (Types PRX/125 and PRX/125-AP only)
34 Plug (Types PRX/125 and PRX/125-AP only)
35 Spring Barrel Extension for AP
Type SA/2 Pilot Supply Filter Regulators
(Figure 7)
Key Description
1 Spring
2 Socket Head Cap Screw
3 Washer
4 Plate
5 Regulator Seat
6* O-ring
7 Body
8 Filter Net
9 Washer
10 Nut
11 Filter Cover
12* Felt
13* O-ring
14 Spring
15* Pad Holder Unit
16 Nameplate
17 Screw Unit
18* Diaphragm
19 Regulator Cover
20 Spring Washer
21 Nut
153 O-ring (EZHSO Series only)(5)
154 Hex Socket Cap Screw
EZHSO Series only (1 required)
DN 25 / NPS 1 Body
DN 50 / NPS 2 Body
DN 80 / NPS 3 Body
DN 100 / NPS 4 Body(4)
155 Stem Nut, DN 25 / NPS 1 Body EZHSO Series only(4)
156 Upper Spring Seat Adapter (EZHSO Series only)(4)
157 Anti-friction ring (EZHSO Series only), DN 100 / NPS 4 Body
158 O-ring (EZHSO Series only), DN 100 / NPS 4 Body
159 Check valve
160* Back-up ring (2 required)
192 Travel Indicator Scale
193 Washer (EZHSO Series only)
Mounting Parts (Figures 3 through 5)
Standard Congurations for Single Pilot and
Working Monitor Pilots
Key Description
46 Pipe Nipple
47 Pipe Nipple
(3 required for Working Monitor Pilots)
(45° Internal Elbow for Working Monitor Pilots only)
Pre-Piped Pilot Supply Single-Pilot Conguration
(with standard body or tapped inlet body)
Key Description
47 Pipe Nipple
48 Tube Elbow (4 required)
49 External Tube Connector
51 Pipe Cross
52 Tubing
Pre-Piped Pilot Supply and Pilot Exhaust
Single-Pilot Conguration
(with tapped inlet and outlet body)
Key Description
47 Pipe Nipple
48 Tube Elbow (5 required)
49 External Tube Connector
50 Pipe Tee
51 Pipe Cross
52 Tubing
55 Internal Connector
Pre-Piped Pilot Supply Working Monitor
Pilot Conguration
(with standard body or tapped inlet body)
Key Description
47 Pipe Nipple
48 Tube Elbow
49 External Tube Connector
50 Pipe Tee
51 Pipe Cross
52 Tubing
54 Pipe Nipple
Pre-Piped Pilot Supply and Pilot Exhaust
Working Monitor Pilot Conguration
(with tapped inlet and outlet body)
Key Description
47 Pipe Nipple (2 required)
48 Tube Elbow (5 required)
*Recommended spare part
4. Included also in sleeve subassembly.
5. Included also in sleeve subassembly, available for DN 25, 50 and 80 / NPS 1, 2 and 3 body sizes only.
Key Description
Key Description
Parts List
EZH and EZHSO Series Main Valve
(continued)

5
EZH and EZHSO Series
GD89918_H
Figure 1. EZH Series Main Valve Assembly
APPLY LUBRICANT (L) / SEALANT (S)(1):
L1 = LITHIUM HYDROXYSTEGRATE NLGI 2 GRADE GREASE
L2 = SILICONE-BASED GREASE
S1 = ANAEROBIC METHACRYLATE SEALANT FOR NUTS AND BOLTS
S2 = ANAEROBIC METHACRYLATE SEALANT FOR THREADS
1. Lubricant and sealant must be selected such that they meet the temperature requirements.
L2
L2 L2 L2 L2 L1
L2
L2
L2
S1
S1
S1
L1
L2 L2
L2
L2
L2
L2
L2 4
3
2
1
33
32
34
33
32
31
30
29
28
27
6
26
25
24
23
22
21
10
5
7
8
9
8
62
10
11
44
13 14
4810 9 8 15 16 17 18 19 20
IMPROVED TRAVEL
INDICATOR DETAIL
VERSION WITHOUT
TRAVEL INDICATOR
DETAIL
DN 25 THROUGH 80 / NPS 1 THROUGH 3
FOR DN 25 / NPS 1
EZH SERIES
VERSION ONLY
FOR DN 80 / NPS 3
EZH SERIES
VERSION ONLY
142B
138
140
38
35
6
139
140
141
143
160
145
144 S2
L2
L2
143
L2
TOP VIEW

6
EZH and EZHSO Series
DN 25 THROUGH 80 / NPS 1 THROUGH 3
43 35
39
36
37
60
59 37
Figure 1. EZH Series Main Valve Assembly (continued)
GD89918_J
Figure 1. EZH Series Main Valve Assembly (continued)
DN 100 / NPS 4
MLM1945_B
43
36 37
37
59

7
EZH and EZHSO Series
Figure 1. EZH Series Main Valve Assembly (continued)
TRAVEL INDICATOR DETAIL
VERSION
WITHOUT TRAVEL
INDICATOR DETAIL
MLM1945_B
APPLY LUBRICANT (L) / SEALANT (S)(1):
L1 = LITHIUM HYDROXYSTEGRATE NLGI 2 GRADE GREASE
L2 = SILICONE-BASED GREASE
S1 = ANAEROBIC METHACRYLATE SEALANT FOR NUTS AND BOLTS
S2 = ANAEROBIC METHACRYLATE SEALANT FOR THREADS
1. Lubricant and sealant must be selected such that they meet the temperature requirements.
44 13 14 10 83 35 70
38
73 72 69 77 74 75 15 16
17
18
19
20
21
10
22
23
8
8
9
8
27
78
29
30
31
8
9
8
68
8
8
66
67
64
6
5
63
7
82
61
2
1
10 11
3233
34
9
8
L2
L2
L2
L2
L2
L2
L2
L2 L2
L2
L2
L2
L2
L2
L2
L1
L2
L2
L2 S2
S2
S1
S1
DN 100 / NPS 4
139
141
145
143
144
138
160
140
L2
142B
L2
S2
71
192

8
EZH and EZHSO Series
Figure 2. EZHSO Series Main Valve Assembly
GE42373_D
APPLY LUBRICANT (L) / SEALANT (S)(1):
L1 = LITHIUM HYDROXYSTEGRATE NLGI 2 GRADE GREASE
L2 = SILICONE-BASED GREASE
S1 = ANAEROBIC METHACRYLATE SEALANT FOR NUTS AND BOLTS
S2 = ANAEROBIC METHACRYLATE SEALANT FOR THREADS
1. Lubricant and sealant must be selected such that they meet the temperature requirements.
L2
L2
L2
L2
L1L2
L2
L1
L2
L2
L2
L2
L2
L2
L2
L2
L2
S1
4
8
9
8
11
10
62
8
9
8
7
5
4
3
2
1
34
154
30
27
28
29
152
149
150
6
26
25
24
23
22
21
19
181716
15
148
44
146
14
13
20
10
147
155
FOR DN 25 / NPS 1
EZH SERIES
VERSION ONLY
IMPROVED TRAVEL
INDICATOR DETAIL
VERSION WITHOUT
TRAVEL INDICATOR DETAIL
DN 25 THROUGH 80 / NPS 1 THROUGH 3
FOR DN 25 / NPS 1
EZH SERIES VERSION ONLY
FOR DN 80 / NPS 3
EZH SERIES VERSION ONLY
38
35
6
143
L2
147 151 193 153
142B
138
139
140
141
143
160
145
144 S2
L2
L2
TOP VIEW
140

9
EZH and EZHSO Series
Figure 2. EZHSO Series Main Valve Assembly (continued)
TRAVEL INDICATOR DETAIL
GE32477_D
APPLY LUBRICANT (L) / SEALANT (S)(1):
L1 = LITHIUM HYDROXYSTEGRATE NLGI 2 GRADE GREASE
L2 = SILICONE-BASED GREASE
S1 = ANAEROBIC METHACRYLATE SEALANT FOR NUTS AND BOLTS
S2 = ANAEROBIC METHACRYLATE SEALANT FOR THREADS
1. Lubricant and sealant must be selected such that they meet the temperature requirements.
L2
L2
L2
L2
L2
L2
L2
L2
44 14 83 10 35
146
151 193 70
L2
153 147
S2
156
L2
69 77
S2
74 75
L2
15 16
17 L2
L1
L2
L2
L2
L2
L2
L2
L2
L2
S1
18
19
20
21
10
22
23
8
9
8
8
9
8
27
78
148
11
10
157
158
157
8
8
64
6
5
63
7
13
150
149
61
152
2
1
34 30 154 29
S2
67
66 68
DN 100 / NPS 4
139
141
145
143
144
138
160
140
L2
142B
L2
S2
71
192

10
EZH and EZHSO Series
GE01727_E
Figure 3. EZH Series Single Pilot Mounting Assembly
DN 25 THROUGH 80 / NPS 1 THROUGH 3
48
46
47
47
52
51 49
159
“L”
PORT
“B”
PORT
TYPE PRX/120-AP
TYPE SA/2
BACK CHECK VALVE
VIEW: A-A

11
EZH and EZHSO Series
GE46932_C
Figure 3. EZH Series Single Pilot Mounting Assembly (continued)
DN 100 / NPS 4
46
50
47
49
52
49
51
159
48
47
EZH SERIES
DN 100 / NPS 4
“L” PORT
TYPE PRX/120-AP
BACK CHECK VALVE
TYPE SA/2
“B” PORT

12
EZH and EZHSO Series
GE01790_D
Figure 4. EZH Series Working Monitor Pilot Mounting Assembly
DN 25 THROUGH 80 / NPS 1 THROUGH 3
54
50
49
52
48
49
159
46
47
48
47
“L”
PORT
“B”
PORT
TYPE SA/2
TYPE PRX/120-AP
VIEW: A-A
BACK CHECK VALVE

13
EZH and EZHSO Series
GE47004_B
Figure 4. EZH Series Working Monitor Pilot Mounting Assembly (continued)
DN 100 / NPS 4
46
159
56
47
49
159
48
47
48
49 54
50
52
EZH SERIES
DN 100 / NPS 4
BACK CHECK VALVE
BACK CHECK VALVE
TYPE PRX/120-AP
TYPE SA/2

14
EZH and EZHSO Series
Figure 5. EZHSO Series Single Pilot Mounting Assembly
DN 25 THROUGH 80 / NPS 1 THROUGH 3
GG04807_B
DN 100 / NPS 4
GE45387_B
46
47
51
48
49
50
52
49
159
“L” PORT
“A” PORT
“B” PORT TYPE SA/2
TYPE PRX/120
BACK CHECK VALVE
46
47
51
48
49
50
52
49
159
“L” PORT
“A” PORT
“B” PORT TYPE SA/2
TYPE PRX/120
BACK CHECK VALVE
46
47
51
48
49
50
52
49
159
“L” PORT
“A” PORT
“B” PORT TYPE SA/2
TYPE PRX/120
BACK CHECK VALVE
46
50
47 48 49
49
52
159
EZH SERIES
NPS 4 / DN 100
“L” PORT
TYPE PRX/120-AP
TYPE SA/2
“B” PORT
BACK CHECK VALVE
46
50
47 48 49
49
52
159
EZH SERIES
NPS 4 / DN 100
“L” PORT
TYPE PRX/120-AP
TYPE SA/2
“B” PORT
BACK CHECK VALVE
46
50
47 48 49
49
52
159
EZH SERIES
NPS 4 / DN 100
“L” PORT
TYPE PRX/120-AP
TYPE SA/2
“B” PORT
BACK CHECK VALVE

15
EZH and EZHSO Series
TYPE PRX/120 OR PRX/125
TYPE PRX/120 OR PRX/120-AP
TYPE PRX/120-AP OR PRX/125-AP
TYPE PRX/125 OR PRX/125-AP
Figure 6. PRX Series Pilot Assemblies
S - BLEED PORT
B - SUPPLY PORT
L - LOADING PORT
A - SENSING PORT
D - DAMPER
R - RESTRICTOR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
14
1819
13112010
11
21
22
23
24
18
11
26
25
4
35
4
R
32
28
30
31
30
29
28
27
L
S
B
D
28
S
L
34
31
30
D
29
B
28
27
33

EZH and EZHSO Series
©Emerson Process Management Regulator Technologies, Inc., 2015; All Rights Reserved
The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. Fisher is a mark owned by Fisher Controls International LLC,
a business of Emerson Process Management.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties
or guarantees, express or implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify or improve the designs or specications
of such products at any time without notice.
Emerson Process Management Regulator Technologies, Inc. does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use
and maintenance of any Emerson Process Management Regulator Technologies, Inc. product remains solely with the purchaser.
Industrial Regulators
Emerson Process Management
Regulator Technologies, Inc.
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McKinney, Texas 75070 USA
Tel: [phone]
Outside U.S. [phone]
Asia-Pacic
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Tel: [phone]
Europe
Bologna 40013, Italy
Tel: [phone]
Middle East and Africa
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Tel: [phone]
Natural Gas Technologies
Emerson Process Management
Regulator Technologies, Inc.
USA - Headquarters
McKinney, Texas 75070 USA
Tel: [phone]
Outside U.S. [phone]
Asia-Pacic
Singapore 128461, Singapore
Tel: [phone]
Europe
Bologna 40013, Italy
Tel: [phone]
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Tel: [phone]
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Tel: [phone]
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Shanghai 201206, China
Tel: [phone]
For further information visit www.emersonprocess.com/regulators
Figure 7. Type SA/2 Pilot Supply Filter Assemblies
LM1162
H
H
1
2
3
4
5
6
7
8
9
10
111213
M
14
15
16
17 R
18
V
19 20 21
AA
OUTLET
PORT
INLET
PORT
SENSING
PORT
HOT WATER
INLET/OUTLET
HOT WATER
INLET/OUTLET