Emerson Fisher EZH Series Instruction Manual

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Instruction Manual

September 2013

Type EZH

Type EZH Relief or Backpressure Regulator

TYPE PRX/182

Figure 1. Type EZH Regulator Figure 2. PRX Series Pilot

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® relief valve or backpressure regulator must be installed, operated, and maintained in accordance with federal, state, and local codes, rules and regulations, and Emerson Process Management Regulator Technologies, Inc. (Regulator Technologies) instructions.

If the relief valve or backpressure 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 relief valve or backpressure regulator.

Introduction

Scope of the Manual

This manual provides installation, startup and maintenance instructions, and parts ordering information for theType EZH relief valve or backpressure regulator and PRX Series pilots. Information on other equipment used with this product is found in separate manuals.

Product Description

Type EZH relief valve or backpressure regulator is pilotoperated and designed for use in high pressure natural gas transmission/city gate stations, large capacity distribution systems, and power plant feeds.

Pilot Descriptions

The Type EZH relief valve or backpressure regulator include a Type PRX/182 pilot mounted on the main valve. PRX Series pressure reducing pilots have the ability to handle a wide range of setpoints from 29 to 1160 psig /

2.0 to 80.0 bar.

www.fisherregulators.com

D103078X012

Type EZH Relief or Backpressure Regulator

Speci cations

Ratings and speci cations for the Type EZH are listed in the Speci cations section below. Speci cations for speci c relief

valve or backpressure regulator constructions are stamped on a nameplate attached to either the main actuator or the pilot spring case.

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)

1500 psig / 103 bar

Maximum Operating Differential Pressure

(1)

Main Valve: 1500 psid / 103 bar d Pilot (Between loading pressure in pilot and

loading sense pressure): 1233 psid / 85.0 bar d

Outlet Pressure Ranges

(1)

Pressure Registration

External

Pilot Connections 1/4 NPT

Temperature Capabilities

Nitrile (NBR) Version:

-20 to 180ºF / -29 to 82ºC Fluorocarbon (FKM) Version: 0 to 180ºF / -18 to 82ºC

Options

• Pre-piped Pilot Supply

• Travel Indicator

See Table 2

Minimum Differential Pressures

MAIN VALVE

TYPE

EZH

1. The pressure/temperature limits in this Instructional Manual and any applicable standard or code limitation should not be exceeded.

2. Type PRX Fluorocarbon (FKM) elastomer is limited to 0°F / -18°C.

BODY SIZE

NPS DN psid bar d psid bar d

1 25 15.2 1.1 15.7 1.1

2 50 12.0 0.83 13.8 0.95

3 80 10.6 0.73 12.8 0.88

4 100 15.8 1.1 16.4 1.1

(1)

MINIMUM DIFFERENTIAL

For 90% Capacity For 100% Capacity

(1)

(2)

SPRING

PORT A

CASE VENT

PORT B EXHAUST

PORT L

PORT S

M1055

INLET PRESSURE

OUTLET PRESSURE

ATMOSPHERIC PRESSURE

LOADING PRESSURE

Figure 3. Type EZH with Type PRX/182 Pilot

Type EZH Relief or Backpressure Regulator

Table 1. Main Valve Body Sizes, End Connection Styles, and Body Ratings

MAIN VALVE BODY SIZE

NPS DN psig bar

1 25

2 50

3 80

4 100

MAIN VALVE BODY MATERIAL END CONNECTION STYLE

NPT or SWE 1500 103

CL150 RF 290 20.0

CL300 RF 750 51.7

CL600 RF or BWE 1500 103

NPT or SWE 1500 103

CL150 RF 290 20.0

WCC Steel

CL300 RF 750 51.7

CL600 RF or BWE 1500 103

CL150 RF 290 20.0

CL300 RF 750 51.7

CL600 RF or BWE 1500 103

CL150 RF 290 20.0

CL300 RF 750 51.7

CL600 RF or BWE 1500 103

STRUCTURAL DESIGN RATING

Table 2. Relief Set Pressure Ranges

PILOT

TYPE

PRX/182

PRX-AP/182 435 to 1160 30.0 to 80.0 GD27379X012 Clear 0.335 8.51 3.94 100 1160 80.0 1480 102

RELIEF SET

PRESSURE RANGE

psig bar Inch mm Inch mm psig bar psig bar

29 to 116 73 to 290

217 to 609

2.0 to 8.0

5.0 to 20.0

15.0 to 42.0

Part Number Color

GD25522X012 GD25520X012 GD25519X012

Black

Gold

Red

PILOT CONTROL INFORMATION

Wire Diameter Free Length

0.157

0.197

0.236

3.99

5.00

5.99

2.16

2.01

Maximum Operating

Pressure

55 51 51

609 42.0 1480 102

Maximum

Emergency

Pressure

Principle of Operation

A pressure relief valve is a throttling pressure control device that opens and closes to ensure the inlet pressure does not rise above a predetermined pressure. Fisher® relief valves cannot be used as ASME safety relief valves. A backpressure regulator is a device that controls and responds to changes in the upstream pressure. It functions the same as a relief valve in that it opens on increasing upstream pressure.

Relief Valve

As long as the inlet pressure is below the set pressure, the pilot control spring keeps the pilot valve plug closed. Inlet pressure passes through the restrictor and registers as loading pressure on the main valve diaphragm chamber. Force from the main spring, in addition to pilot loading pressure, provide loading pressure to keep the main valve diaphragm and plug assembly tightly shut off. When the inlet pressure rises above the set pressure, the pressure on the pilot diaphragm overcomes the pilot control spring and opens the pilot valve plug. The pilot then exhausts the loading pressure from the main valve diaphragm chamber. The pilot continuously exhausts gas when the inlet pressure is above the set pressure. The inlet pressure unbalance overcomes the main spring force and opens the diaphragm and plug assembly.

As the inlet pressure drops below the set pressure, the pilot control spring closes the pilot valve plug and the exhaust to

atmosphere stops. Force from the main spring, along with pilot loading pressure, pushes the diaphragm and plug assembly

onto the knife-edged seat, producing tight shutoff.

Backpressure Regulator

As long as inlet pressure remains below setpoint, the pilot control spring keeps the pilot valve plug closed. Inlet pressure passes through the upper port around the upper portion of the valve plug and then through the hollow passage in that valve plug. Force from the main spring, in addition to pilot loading pressure, provide downward loading pressure to keep the main valve diaphragm and plug assembly tightly shut off. When inlet pressure rises above the set pressure, pressure on the pilot diaphragm overcomes the control spring to close the upper port and stroke the valve plug to open the lower port. The pilot exhausts loading pressure from the main valve diaphragm chamber. Inlet pressure unbalance overcomes the

main spring force to open the diaphragm and plug assembly.

While the main valve is throttling, the upper port of the pilot stays closed. The pilot exhausts only when it repositions the main valve. As inlet pressure drops below setpoint, the pilot control spring overcomes the diaphragm force to stroke the valve plug down to close the lower port and open the upper port. Force from the main spring, along with pilot loading pressure, pushes the diaphragm and plug assembly onto the knife-edged seat, producing tight shutoff.

Type EZH Relief or Backpressure Regulator

Type EZH

Type EZH Single-Pilot Relief Valve or Backpressure Regulator

Type EZH Adjustment

The adjustment of setpoint (Figure 7), is performed by means of the pilot adjusting screw, which varies the compression of the control spring. Adjustment is performed while the relief valve or backpressure regulator is in operation with the aid of a pressure gauge to monitor upstream pressure.

Loosen the Type PRX pilot locknut and turn the adjusting screw slowly clockwise to increase set pressure and counterclockwise to decrease set pressure. Use a pressure gauge to monitor the set pressure until the desired opening pressure is reached.

CAUTION

Personal injury or equipment damage, due to bursting of pressure-containing parts may result if this relief valve or backpressure regulator is overpressured or is installed where service conditions could exceed the product and pilot pressure ratings.

CAUTION

When installing Type EZH trim in an existing Fisher® E-body, damage can result if ow is not in the correct direction. Look at the body web

to conrm that ow is in the correct direction—

up through the center of the cage and down through the cage slots. Change the existing

ow arrow if necessary.

After assembly, check for shutoff and leakage to atmosphere.

2. A Type EZH relief valve or backpressure regulator may

be installed in any orientation, as long as ow through it

matches the direction of the arrow on the main valve body.

3. Apply pipe compound to the external pipeline threads before installing a relief valve or backpressure regulator with threaded NPT end connections. Use gaskets between

pipeline and relief valve or backpressure regulator anges

when installing a relief valve or backpressure regulator

with anged end connections. 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 relief valve or backpressure regulator.

Installation

WARNING

Personal injury, equipment damage, or leakage due to escaping gas or bursting of pressure-containing parts may result if the Type EZH is installed where its capabilities can be exceeded or where conditions exceed any ratings of the adjacent piping or connections. To avoid this, install a Type EZH relief valve or backpressure regulator where:

• Service conditions are within unit capabilities (including those in the

Specications section).

• Service conditions are within applicable

codes, regulations, or standards.

Additionally, physical damage to the relief valve or backpressure regulator could break the pilot off the main valve, causing personal injury and property damage due to escaping gas. To avoid such injury or damage, install the unit in a safe location.

1. Only personnel qualied through training and

experience should install, operate, and maintain a relief valve or backpressure regulator. Before installation, make sure that there is no damage to, or debris in the main valve body or pilot. Also, make sure that all tubing and piping are clean and unobstructed.

WARNING

When used in relief valve service, the Type EZH main valve and pilot both exhaust gas. In

hazardous or ammable gas service, personal

injury, death, or property damage may occur

due to re or explosion of vented gas that

has accumulated. To prevent such injury or damage, provide piping or tubing to vent the gas to a safe location. The exhaust piping must be designed and installed to guard

against excessive ow restriction. This piping

must be protected against condensation or debris that could clog it.

For safety during shutdown, vent valves are required immediately upstream and downstream of the main valve on a backpressure or bypass installation.

4. If system operation during maintenance is required, install isolating and vent valves as needed.

5. For the Type PRX/182 pilot, if the vent assembly (key 12, Figure 7) remains in the pilot body (key 1, Figure 7), then it must be pointed down if possible or otherwise protected. If the exhaust is to be piped to the main valve exhaust or remotely vented, remove the vent assembly and install tubing or piping into the 1/4 NPT pilot exhaust connection. Protect the open end of the exhaust pipe by installing a screened vent cap.

Type EZH Relief or Backpressure Regulator

6. The Type PRX/182 pilot spring case vent (key 12, Figure 7) must be kept open to atmospheric pressure. Protect the vent assembly from icing, moisture, or debris that may cause blockage, as required. To change the vent orientation, twist the vent assembly in the spring case. To remotely vent the pilot spring case, remove the vent assembly and install tubing or piping into the 1/4 NPT spring case vent tapping. Protect the open end of the vent line by installing a screened vent cap.

7. The Type PRX pilot connections are 1/4 NPT. Connect the inlet control (sense) line from the “A” port, Figure 6 (key 47) on the bottom of the PRX Series pilot to a straight run of pipe 6 to 10 pipe diameters from the relief valve or backpressure regulator inlet as shown in Figure 3 using 3/8-inch / 9.5 mm or larger outside diameter tubing. If such a distance is not practical, connect the control line away from elbows, swages, nipples, or any area where abnormal

ow velocities occur.

Startup and Shutdown

CAUTION

If pressure is introduced rst to the main

valve before the pilot, the main valve may go wide-open and subject the downstream system to full inlet pressure.

Shutdown

1. Close upstream block valve rst and then close the

downstream block valve.

2. Open downstream and upstream vent valves (not shown).

Type PRX/182 Pilot Adjustment

For PRX Series pilots (Figure 7), 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.

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 appropriate shutdown procedure. Use a gauge to monitor relief (inlet) pressure while releasing it.

CAUTION

Note

The maximum inlet pressure for specic

constructions are given in Table 6. Use a pressure gauge to monitor inlet pressure

during startup.

Relief Installation (Figure 6)

Startup

1. Close vent valve (not shown).

2. Slowly open block valve and hand valve, if installed.

3. Adjust the pilot as needed.

Shutdown

1. Close block valve and hand valve, if installed.

2. Slowly open vent valve (not shown).

Backpressure Installation

Startup

1. Close upstream and downstream vent valves (not shown).

2. Slowly open upstream block valve rst and then slowly

open downstream block valve.

3. Adjust the pilot as needed. If the pilot is not piped

downstream, make sure the pilot exhaust is pointed in the correct direction.

Use proper lifting techniques, when lifting the upper and lower actuator casings (keys 11 and 5) off the Type EZH body (key 1). The actuator assembly weighs more than 100 pounds / 45 kg.

Customer cannot use another type of eyebolt in the regulator. Only Regulator Technologies parts can be used to repair the unit.

Eye bolts 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 eye bolts.

Maintenance

Relief valve or backpressure regulator parts are subject to normal wear and must be inspected periodically and replaced as necessary. Due to the care Fisher® takes in meeting all manufacturing requirements (heat treating, dimensional tolerances, etc.), use only replacement parts manufactured or furnished by Fisher. Also when lubrication is required, use a good quality lubricant and sparingly coat the recommended parts.

The frequency of inspection and replacement depends upon the severity of service conditions and upon applicable codes, government regulations, and company standards.

Type EZH Relief or Backpressure Regulator

Table 3. Torque Specications

TORQUE SPECIFICATIONS

PART NAME

Indicator Fitting or Plug (key 141) 10 to 30 14 to 41 10 to 30 14 to 41 10 to 30 14 to 41 10 to 30 14 to 41

Stud Nuts (key 26) 45 to 50 61 to 68 45 to 50 61 to 68 80 to 95 108 to 129 - - - -

Socket Head Cap Screws (key 16) 50 to 70

Stud Bolts (key 24) 50 to 70 68 to 95 50 to 70 68 to 75 100 to 120 136 to 163 - - - -

Cap Screws (key 21) 50 to 55 68 to 75 130 to 150 176 to 203 250 to 270 339 to 366 280 to 310 380 to 420

Cap Screws (key 6) 50 to 60 68 to 81 50 to 60 68 to 81 70 to 95 95 to 129 140 to 155 190 to 210

Socket Head Cap Screws (key 33) 30 to 40

Smart Screws (key 68) - - - - - - - - - - - - 31 to 40

Socket Head Cap Screws (key 74) - - - - - - - - - - - - 26 to 35

Cap Screws (key 77) - - - - - - - - - - - - 90 to 110 122 to 149

Sleeve Guide (key 61) - - - - - - - - - - - - 130 to 140 176 to 190

Cap Screw (key 154) 16

Stem Nut (key 151) 32 43 32 43 45

Stem Nut (key 155) 30

Hex Nut (key 152) - - - - 40

1. Torque specications are given in inch-pounds.

NPS 1 / DN 25 NPS 2 / DN 50 NPS 3 / DN 80 NPS 4 / DN 100

foot-pound N•m foot-pound N•m foot-pound N•m foot-pound N•m

(1)

5.6 to 7.9 50 to 70

(1)

3.4 to 4.5 50 to 60

(1)

1.8 50

41 - - - - - - - - - - - -

(1)

6 to 7.9 50 to 70

(1)

5.6 to 6.8 80 to 100

(1)

Body Size

(1)

6.2 to 7.9 100 to 115

(1)

9 to 11 80 to 100

5.6 10

54 60 81 45 to 50 61 to 68

14 2.9 to 3.5 3.9 to 4.7

61 45 to 50 61 to 68

(1)

11 to 13

(1)

9 to 11

(1)

3.5 to 4.5

(1)

2.9 to 4

Main Valve and Actuator Maintenance

NPS 1 through 3 / DN 25 through 80 Disk Maintenance (Refer to Figure 4)

For Type EZH:

1. Remove nuts (key 26).

2. Carefully lift the upper actuator casing and lower actuator casing assembly (keys 11 and 5) off the body (key 1).

3. Remove the hex socket cap screws (key 33) and lock washers (key 32). Lift off the disk holder assembly (key 30) and disk retainer (key 31).

4. Remove the O-ring (key 29). Inspect the O-ring for damage or wear, and replace if necessary. Lightly lubricate O-ring before placing in the sleeve adaptor (key 27).

5. Remove the cage (key 3), seat ring (key 2) and O-ring (key 34). Inspect the O-ring for damage or wear, and replace if necessary. Lightly lubricate O-ring before placing in the body (key 1).

6. Set the seat ring (key 2) back in the body (key 1) with the curved side down and the seat edge up. Place the cage (key 3) on top of seat ring. The cage will engage the step on the seat ring.

7. Place the disk holder assembly (key 30) and disk retainer (key 31) on the sleeve adaptor (key 27).

8. Insert the lock washers (key 32) and hex socket cap

screws (key 33) and tighten. See Torque Specications

(Table 3) for proper torque values.

9. Carefully lift the upper actuator casing and lower actuator casing assembly (keys 11 and 5) and place

on the body (key 1). Secure with stud bolts and nuts

(keys 24 and 26). See Torque Specications (Table 3) for

proper torque values.

NPS 4 / DN 100 Disk Maintenance (Refer to Figure 4)

1. Remove cap screws (key 77).

2. Carefully lift the cap (key 70) off the upper actuator casing (key 11) and unscrew the eye bolts (key 35) from the cap (key 70).

3. Remove O-ring (key 75). Inspect the O-ring for damage or wear, and replace if necessary.

4. Remove the O-ring (key 69). Inspect the O-ring for damage or wear, and replace if necessary. Lubricate O-ring before placing inside the cap (key 70).

5. Remove special screws (key 68) from sleeve (key 14).

6. Fit eye bolt (key 35) into the upper spring seat (key 73) threaded hole.

7. Carefully remove the trim system from the sleeve guide (key 61) using the eye bolts (key 35).

8. Remove socket head cap screws (key 33) and lock washers (key 32).

9. Lift off the disk retainer (key 31) and disk holder assembly (key 30).

10. Remove the O-ring (key 29). Inspect the O-ring for

damage or wear, replace if necessary. Lightly lubricate O-ring before placing the sleeve adaptor (key 27).

11. Place disk holder assembly (key 30) onto disk retainer

(key 31).

Type EZH Relief or Backpressure Regulator

16 171819

L2 L2 L2

10 9 8

13 14

TOP VIEW

140

160

143

IMPROVED TRAVEL

INDICATOR DETAIL

GD89918_H

APPLY LUBRICANT (L) / SEALANT (S) 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.

138

139

140

141

142B

145

144

(1)

143

VERSION WITHOUT TRAVEL INDICATOR

DETAIL

NPS 1 THROUGH 3 / DN 25 THROUGH 80

FOR NPS 1 / DN 25

EZH SERIES

VERSION ONLY

FOR NPS 3 / DN 80

EZH SERIES

VERSION ONLY

Figure 4. Type EZH Main Valve Assembly

Type EZH Relief or Backpressure Regulator

GD89918_J

NPS 1 THROUGH 3 / DN 25 THROUGH 80

Figure 4. Type EZH Main Valve Assembly (continued)

12. Place disk retainer (key 31) with the disk holder assembly (key 30) into sleeve adaptor (key 27) and align screw holes.

13. Place lock washer (key 32) onto the screws (key 33).

14. Screw together the disk retainer assembly into the

sleeve adaptor (key 27). See Torque Specications

(Table 3) for proper torque values.

21. Mount O-ring (key 75) on the space between the cap (key 70) and the upper actuator casing (key 11).

22. Screw the eye bolts (key 35) on the cap (key 70).

NPS 1 through 3 / DN 25 through 80 Intermediate Flange O-ring Maintenance

for Type EZH

15. Lubricate the sleeve (key 14).

16. Carefully insert the trim system into the sleeve guide (key 61) utilizing eye bolt (key 35). Align sleeve utilizing the socket hex cap screw (key 74) as a guide.

17. Screw special screws (key 68) to afx the sleeve

system. See Torque Specications (Table 3) for proper

torque values. Place O-ring (key 69) on cap.

18. Remove eye bolt (key 35) from upper spring seat (key 73) threaded hole.

19. Carefully place the cap on the upper actuator casing (key 11).

20. Lubricate cap screws (key 77) and attach cap (key 70) to the upper casing using cap screws (key 77). See

Torque Specications (Table 3) for proper torque values.

Note

Rotate the cap (key 70) 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.

1. Remove nuts (key 26).

2. Carefully lift the upper actuator casing and lower actuator casing assemblies (keys 11 and 5) off the body (key 1).

3. Remove cap screws (key 6).

4. Lift off intermediate ange (key 25).

5. Remove O-ring (key 7). Inspect the O-ring for damage or wear, and replace if necessary. Lightly lubricate O-ring before placing in the body (key 1).

6. Place the intermediate ange (key 25) on the body, make sure to position the stud bolt (key 24) holes on the outsides of the body (key 1). Secure with cap screws

(key 6). See Torque Specications (Table 3) for proper

torque values.

7. Carefully lift upper actuator casing and lower actuator casing assemblies (keys 11 and 5) and position it in the body (key 1).

8. Screw in stud bolts and nuts (keys 24 and 26).

See Torque Specications (Table 3) for proper

torque values.

Type EZH Relief or Backpressure Regulator

NPS 1 through 3 / DN 25 through 80 Actuator Assembly Maintenance

(Refer to Figure 4)

1. Make a mark on the upper actuator casing (key 11), lower

actuator casing (key 5), intermediate ange (key 25),

and body (key 1) to indicate proper alignment when reassembling the product.

2. Remove travel indicator assembly (keys 138, 139, 140, 141, 142B, 143, 144, 145, 160, and 192), if present, by

loosening the travel indicator tting (key 141) and lifting

out the travel indicator assembly.

3. Loosen out the hex nuts (key 23) and remove the washers (key 22) and the cap screws (key 21). Remove

all the short bolts rst, then evenly remove the two long

bolts (key 39), indicated with (LB) on the head and brackets (key 35). Make sure to balance the upper actuator casing while removing the spring tension. Carefully lift the upper actuator casing (key 11) off the lower actuator casing (key 5). Remove spring (key 13).

4. Remove the socket head cap screws (key 16). Lift off the diaphragm (key 20) and the inlet plate (key 18). Remove O-rings (keys 15 and 17). Inspect the diaphragm and O-rings for damage and wear, and replace if necessary.

5. Inspect the upper actuator casing (key 11), O-ring (key 9), anti-friction split rings (key 8), and anti-friction ring (key 4) for damage or wear. If damage, remove the O-ring and split rings, and replace with new parts. Lightly lubricate the O-ring and split rings. Place the split rings in the

body rst, then slide the O-ring between the split rings.

Lubricate and reinstall the anti-friction ring (key 4).

6. Remove hex nuts (key 26) from the stud bolts (key 24). Lift off the lower actuator casing (key 5). Remove the hex socket cap screws (key 33) and spring lock washers (key 32). Lift off the disk holder assembly (key 30) and disk retainer (key 31).

10. Lightly lubricate the O-rings (keys 15 and 17) and the inner and outer diaphragm (key 20) edges. Place the inlet plate (key 18) and the diaphragm (key 20) on the sleeve (key 14). Make sure O-rings (keys 15 and 17) are correctly positioned. Insert and tighten the hex

socket cap screws (key 16). See Torque Specications

(Table 3) for proper torque values.

Note

When tightening cap screws (key 21) arranged in a circular pattern, alternate the tightening of each fastener with the fastener directly across from it using a “star” crisscross pattern

for ve times, until proper specied 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, contact. It

will take at least ve times around before this

happens. Only then will the applied torque on each screw remain at the required value.

11. Carefully lift the lower actuator casing assembly (key 5) and place on the body (key 1). Make sure to match up the alignment marks. Secure with stud bolts and nuts

(keys 24 and 26). See Torque Specications (Table 3)

for proper torque values.

12. Lightly lubricate the spring (key 13) and place on the inlet plate (key 18).

13. Carefully place the upper actuator casing (key 11) on the lower actuator casing (key 5). Make sure to match up the alignment marks. Insert the two long bolts

(key 39) 180° apart and away from anges. Place

the washers (key 22), hex nuts (key 23), and brackets (key 35) on the long bolts and evenly tighten. Using proper bolting techniques, install remaining short bolts (key 21), washers and hex nuts. See Torque

Specications (Table 3) for proper torque values.

7. Slide the sleeve (key 14) out of the lower actuator casing (key 5) and slide the outlet plate (key 19) off the sleeve. Check the sleeve for scratches, burrs, or other damage, and replace if necessary.

8. Inspect the lower actuator casing (key 5), O-rings (keys 9 and 62), anti-friction split rings (key 8), and anti-friction rings (key 4) for damage or wear. If damaged, remove the O-ring and split rings, and replace with new parts. Lightly

lubricate the O-ring body rst, then slide the O-ring (key 9)

between the split rings. Lubricate and mount O-ring (key 62) outside of the lower actuator casing (key 5).

9. Slide the outlet plate (key 19) onto the sleeve (key 14) and slide the sleeve into the lower actuator casing (key 5). Place the disk holder (key 30) and disk retainer (key 31) on the sleeve adaptor (key 27). Insert the spring lock washers (key 32) and hex socket cap screws

(key 33) and tighten. See Torque Specications (Table 3)

for proper torque values.

14. Place travel indicator assembly (keys 138, 139, 140, 141, 142B, 143, 144, 145, 160, and 192) in the upper actuator casing (key 11), if present, and tighten the

travel indicator tting (key 141).

NPS 4 / DN 100 Actuator Assembly Maintenance (Refer to Figure 4)

1. If present, remove the travel indicator assembly by

unscrewing the travel indicator tting (key 141), then pull

out the stem (key 139).

2. Remove hex head cap screws (key 21), washers

(key 22), and hex nuts (key 23). Carefully lift the upper actuator casing (key 11) off the lower actuator casing (key 5). Inspect the upper actuator casing (key 11), O-rings (key 9) and anti-friction rings (key 8) for damage or wear. If damaged, remove and replace with new

parts. Place the anti-friction rings in the body rst, then

slide the O-ring between the anti-friction rings.

Type EZH Relief or Backpressure Regulator

TRAVEL INDICATOR DETAIL

192

139

140

141

142B

143

144

138

160

145

VERSION

WITHOUT TRAVEL

INDICATOR DETAIL

703873 72 69

NPS 4 / DN 100

MLM1945_B

1. Lubricant and sealant must be selected such that they meet the temperature requirements.

(1)

Figure 4. Type EZH Main Valve Assembly (continued)

3233

Type EZH Relief or Backpressure Regulator

MLM1945_B

Figure 4. Type EZH Main Valve Assembly (continued)

NPS 4 / DN 100

3. Unscrew 8 special screws (key 68). Unscrew eye bolts (key 35) from the cap and unscrew 8 screws (key 77) to remove cap (key 70) from the upper actuator casing (key 5). Attach eye bolts to the upper spring seat (key 73) and lift up and remove the sleeve assembly (key 14). Lift off the diaphragm/plates system. Remove O-ring (key 15) and replace it as needed. Inspect diaphragm for damage or wear; remove screws (key 16), lift off inlet plate (key 18) to replace diaphragm (key 20) and O-ring (key 17).

4. Align screw holes on the cap (key 70) to the sleeve guide screw (key 66). Remove sleeve guide (key 61) utilizing cap (key 70) to unscrew. Inspect O-rings (keys 9 and 64) for damage or wear, replace antifriction ring (key 8) and O-ring (key 9) if necessary. Unscrew 8 cap screws (key 6) and remove crush washers (key 67). Lift off lower casing (key 5). Inspect O-ring (keys 7 and 63) for damage or wear. Replace if necessary.

5. Remove cage (key 78).

6. Remove seat ring (key 2). Inspect seat ring for damage or wear. If damaged, replace with new parts.

7. Remove O-ring (key 34) from body. Inspect for damage or wear. If damaged, replace with new parts.

8. Lubricate O-ring (key 34) and replace into the body.

10. Place cage (key 78) on the top of seat ring (key 2).

11. Place lower casing (key 5) on top of the body. Replace washer (key 67) and tighten cap screws (key 6). Screw sleeve guide (key 61) into lower casing (key 5) utilizing cap (key 70).

12. Lubricate the sleeve (key 14) in the upper plate contact area and assemble the diaphragm/plates system on the sleeve system. Tighten screws (key 16) using

a “star” criss-cross pattern for ve times until proper specied torque is achieved.

13. Screw the special screws (key 68) – already on the

sleeve – to x the diaphragm/plates system on the sleeve system. See Torque Specications (Table 3)

for proper torque values. Tighten screws (key 68)

using a “star” criss-cross pattern for ve times until proper specied torque is achieved.

14. Lubricate lower casing (key 5) on the diaphragm contact area.

15. Carefully insert the trim system into the sleeve guide (key 61) utilizing the eye-bolts (key 35) that ts in the upper spring seat (key 73) threaded hole.

16. Lubricate the diaphragm (key 20) on the upper casing contact area.

9. Place seat ring (key 2) on top of O-ring (key 34) in body with the curved side down and seat edge up.

Type EZH Relief or Backpressure Regulator

TOP VIEW

140 140

142A

LEGACY TRAVEL INDICATOR DETAIL

P1766

APPLY LUBRICANT (L) / SEALANT (S) L2 = SILICONE-BASED GREASE S2 = ANAEROBIC METHACRYLATE SEALANT FOR THREADS

1. Lubricant and sealant must be selected such that they meet the temperature requirements.

(1)

138

139

140

141

143

145

144

Figure 5. Type EZH Travel Indicator Assembly

TOP VIEW

142B

IMPROVED TRAVEL INDICATOR DETAIL

138

139

140

141

160

143

145

144

17. Lubricate and mount the O-ring (key 69) on the cap

(key 70). Lubricate and mount O-rings (key 9) and anti-friction rings (key 8) inside the cap. Unscrew the eye bolts (key 35) from the upper spring seat (key 73) and carefully place the cap on the upper actuator casing (key 11). Align the travel indicator hole on the cap to the upper actuator casing travel indicator hole. Lubricate cap screws (key 77) and attach cap (key 70) to the upper casing (key 5) using cap screws

(key 77). Bag diaphragm at to lower actuator casing diaphragm ange contact area. Carefully place the

upper actuator casing on the top of the lower actuator casing/trim system using a stud to guide.

Note

Rotate the upper casing such that the outer holes for sensing lines are perpendicular to

gas ow and outer holes of lower casing.

18. Lubricate threads on bolts (key 21).

19. Bolt together the upper and lower actuator casings

(keys 11 and 5) using cap screws (key 21), washers (key 22), and hex nuts (key 23). See Torque Specifications (Table 3) for proper torque values.

Tighten cap screws using a “star” criss-cross pattern for five times until proper specified torque is achieved.

20. Mount O-ring (key 75) on the cap (key 70).

21. Screw the eye-bolts (key 35) on the cap (key 70).

22. If present, set the stem (key 139) through the casing hole and tap it into the groove in the diaphragm plate

(key 18). Slide the travel indicator tting (key 141) over

the stem and tighten to the cap (key 70).

Type EZH Travel Indicator Maintenance

A new and improved travel indicator has been phased in during 2013. The new version improves the O-ring stem seal to minimize leakage and extend service life. The components of the legacy and new versions are not interchangeable. If maintenance is performed on the new travel indicator, it is recommended to replace the entire travel indicator assembly with the new version. Part numbers for the assemblies are shown in the parts list. Figure 5 shows the difference between the designs. The spare parts kits will support either design. Take care to use the correct O-ring (key 142A or 142B) when performing maintenance, see parts list for the appropriate part number.

Type EZH Relief or Backpressure Regulator

1. Remove plastic travel indicator cover (key 138).

2. Loosen travel indicator bushing (key 140) and remove it by sliding it over the travel indicator stem (key 139).

3. Remove indicator tting (key 141) and inspect O-ring (key 143). Remove O-ring (key 142B) and back-up rings (key 160). Replace and lubricate O-ring if damaged. Pull up on the travel indicator stem (key 139) to force the spring collet (key 144) out of the diaphragm head groove. Examine these parts and the stem for wear and replace if necessary.

4. Examine the retaining ring (key 145) for wear, and replace if necessary.

5. Insert the travel indicator stem (key 139) and spring collet (key 144) back into the diaphragm head groove. Replace

the indicator tting (key 141) and O-ring (key 143), and

tighten with a referenced torque of 3.7 foot-pounds /

5.0 N•m.

6. Lubricate the O-ring (key 142B) and back-up rings (key 160, 2 required). Place one back-up ring on the stem (key 139) followed by the O-ring and then the other

back-up ring. Push into groove of the indicator tting

(key 141).

7. Slide the travel indicator bushing (key 140) over the travel

indicator stem (key 139) and tighten rmly in place.

8. Replace the travel indicator cover (key 138) and tighten

rmly in place.

Type PRX/182 Maintenance (Figure 7)

6. Lightly lubricate the rims of the diaphragm (key 14) and place it on top of the lower diaphragm plate (key 15). Set the diaphragm plate (key 13) on the diaphragm (key 14).

7. Lightly lubricate the O-ring (key 18) and place it in the lower cover (key 21).

8. Place the washer (key 11) and stem nut (key 20) on the stem (key 23) and tighten. If also performing Upper

Case Maintenance, skip to step 2 of the Upper Case Maintenance section.

9. Insert washers (key 11) and machine screws (key 10) in the lower cover (key 21) and tighten uniformly to ensure proper seal.

Upper Diaphragm Maintenance

1. Disconnect pilot and remove it from the line.

2. Loosen locknut (key 2) and back out adjusting screw (key 1) until compression is removed from the spring. Remove cap (key 3).

3. Lift the upper spring seat (key 6), spring (key 7), and O-ring (key 4) out of the spring case (key 8). Inspect O-ring and replace if necessary.

4. Remove the machine screws (key 10) and the washers (key 11), separate the spring case (key 8) from the body (key 16), and lift the lower spring seat (key 9) away from upper diaphragm nut (key 26). Use a wrench to hold stem (key 23) securely while removing the upper diaphragm nut.

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

1. Disconnect pilot and remove it from the line.

2. Remove machine screws (key 10) from lower cover (key 21) and the separate lower cover from the body (key 16).

3. Use a wrench to hold the stem (key 23) and break loose the stem nut (key 20). Remove the stem nut and washer (key 11).

4. Remove the diaphragm plate (key 13), diaphragm (key 14), lower diaphragm plate (key 15), and O-ring (key 18). Inspect parts for damage or wear, replace if necessary.

5. Lightly lubricate the O-ring (key 25). Place O-ring over the stem (key 23) and press it down into the body (key 16).

5. Remove remaining loose components: washer (key 11), upper diaphragm plate (key 13), diaphragm (key 14), disk holder (key 22), and O-ring (key 18). Inspect diaphragm and O-ring for damage or wear, and replace if necessary.

6. Remove orice (key 19) and O-ring (key 17). Inspect the parts for damage or wear, and replace if necessary. Lightly lubricate the O-ring and place in the body (key 16).

Install the orice.

7. Set the disk holder (key 22) in the body (key 16).

8. Lightly lubricate the rims of the diaphragm plate (key 14). Position the diaphragm convolution facing down, make sure that the diaphragm is not deformed and is properly installed. Take the diaphragm (key 14) and place it in the body (key 16) on top of the disk holder (key 22).

9. Set the upper diaphragm plate (key 13) on top of the diaphragm (key 14).

10. Place washer (key 11) and stem nut (key 26) on the

stem (key 23) and tighten using a wrench to hold the stem.

11. Place the upper spring seat (key 9) on the upper

diaphragm nut (key 26) and mount the spring case (key 8) on top of the body (key 24) and the diaphragm (key 14).

Type EZH Relief or Backpressure Regulator

12. Place washers (key 11) and uniformly tighten the machine screws (key 10) to hold the body (key 24) and spring case (key 8) together.

13. Install spring (key 7) and upper spring seat (key 6) on top of the lower spring seat (key 9) inside the spring case (key 8). Install Cap (key 3).

14. Screw in adjusting screw (key 1) at desired spring compression and use the lock nut (key 2) to lock the adjusting screws position.

Parts Ordering

Each Type EZH relief valve or backpressure regulator is assigned a serial number, which can be found on the nameplate. Refer to the serial number when contacting

your local Sales Ofce for technical information or when

ordering parts.

When ordering replacement parts, reference the key number of each needed part as found in the following parts list. Separate kit containing all recommended spare parts is available.

Parts Lists

Type EZH Main Valve (Figure 4)

Key Description Part Number

Type EZH Disk Parts Kits

(NPS 1, 2, and 3 / DN 25, 50, and 80 include keys 29, 30, 32, 33, 34, and 62; NPS 4 / DN 100 include keys 29, 30, 32, 33, 69, 71, and 75)

NPS 1 / DN 25 Nitrile (NBR) and Fluorocarbon (FKM) REZH1X00N12 Fluorocarbon (FKM) REZH1X00F12 NPS 2 / DN 50 Nitrile (NBR) and Fluorocarbon (FKM) REZH2X00N12 Fluorocarbon (FKM) REZH2X00F12 NPS 3 / DN 80 Nitrile (NBR) and Fluorocarbon (FKM) REZH3X00N12 Fluorocarbon (FKM) REZH3X00F12 NPS 4 / DN 100 Nitrile (NBR) and Fluorocarbon (FKM) REZH4X00N12 Fluorocarbon (FKM) REZH4X00F12 Type EZH Full Repair Kits

(NPS 1, 2, and 3 / DN 25, 50, and 80 include keys 4, 7, 8, 9, 15,17, 20, 28, 29, 30, 32, 33, 34, 62, 142B, and 143; NPS 4 / DN 100 includes keys 8, 9, 15, 17, 20, 29, 30, 32, 33, 34, 63, 64, 67, 69, 71, 75, 142B, and 143)

Key Description Part Number

Type EZH NPS 1 / DN 25 Nitrile (NBR) and Fluorocarbon (FKM) REZH1X00N22 Fluorocarbon (FKM) REZH1X00F22 NPS 2 / DN 50 Nitrile (NBR) and Fluorocarbon (FKM) REZH2X00N22 Fluorocarbon (FKM) REZH2X00F22 NPS 3 / DN 80 Nitrile (NBR) and Fluorocarbon (FKM) REZH3X00N22 Fluorocarbon (FKM) REZH3X00F22 NPS 4 / DN 100 Nitrile (NBR) and Fluorocarbon (FKM) REZH4X00N22 Fluorocarbon (FKM) REZH4X00F22

1 Body See Following Table 2 Seat Ring NPS 1 / DN 25 Body For 100% Capacity GD29726X012 For 80% Capacity M0300940X12 For 50% Capacity M0300910X12 For 30% Capacity M0300710X12 NPS 2 / DN 50 Body For 100% Capacity GD29581X012 For 80% Capacity M0300950X12 For 50% Capacity M0300920X12 For 30% Capacity M0300720X12 NPS 3 / DN 80 Body For 100% Capacity GD29732X012 For 80% Capacity M0300960X12 For 50% Capacity M0300930X12 For 30% Capacity M0300730X12 NPS 4 / DN 100 Body For 100% Capacity M0303250X12 For 80% Capacity M0303430X12 For 50% Capacity M0303420X12 For 30% Capacity M0303410X12

(1)

Cage NPS 1 / DN 25 GE31405X012 NPS 2 / DN 50 GE37679X012 NPS 3 / DN 80 GE38018X012 4* Anti-Friction Ring (2 required) GD27409X012 NPS 1, 2, and 3 / DN 25, 50, and 80 Only 5 Actuator Lower Casing NPS 1 / DN 25 Body GD29697X012 NPS 2 / DN 50 Body GD29583X012 NPS 3 / DN 80 Body GE44397X012 NPS 4 / DN 100 Body M0300770X12 6 Cap Screws NPS 1 / DN 25 Body (4 required) GD89878X012 NPS 2 / DN 50 Body (8 required) GE11386X012 NPS 3 / DN 80 Body (8 required) GE11387X012 NPS 4 / DN 100 Body (8 required) M4691020X12

*Recommended Spare Part

1. When retrotting a Type EZH with pins with the new cage, it’s also necessary to order the

Seat Ring.

Type EZH Relief or Backpressure Regulator

Key 1, Type EZH Main Valve Body Part Numbers

BODY SIZE

NPS DN

3 80

(2)

1. Not available for Standard body.

2. Not available for Tapped Inlet (Pilot Supply) body.

100

BODY MATERIAL END CONNECTION STYLE

Cast iron

WCC Steel

Cast iron

WCC Steel

Cast iron

WCC Steel

Cast iron

WCC Steel

BODY STYLE

Standard or Tapped Inlet

(Pilot Supply)

NPT GE11518X012 - - - - - - - - - - -

CL125 FF GE11528X012 14B5623X012

CL250 RF GE11580X012 14B5623X022

NPT GE11581X012

SWE GE11440X012

CL150 RF GE11583X012 14B5623X032

CL300 RF GE11607X012 14B5623X042

CL600 RF GE11608X012 14B5623X052

SCH 40 BWE GE11610X012

SCH 80 BWE GE11611X012

PN 16-40 RF GE13625X012

NPT GE10583X012

CL125 FF GE10585X012

CL250 RF GE10587X012

NPT GE10588X012

SWE GE10682X012

CL150 RF GE10676X012 14B5834X032

CL300 RF GE10678X012 14B5834X042

CL600 RF GE10679X012 14B5834X052

SCH 40 BWE GE10680X012

SCH 80 BWE GE10681X012

PN 16-40 GE12898X012

CL125 FF GE10689X012

CL250 RF GE10698X012

CL150 RF GE10699X012 14B5835X032

CL300 RF GE10700X012 14B5835X042

CL600 RF GE10701X012 14B5835X052

SCH 40 BWE GE10702X012

SCH 80 BWE GE10703X012

PN 25-40 GE13594X012

CL125 FF GE10707X012

CL250 RF GE10822X012

CL150 RF GE10835X012 14B5836X032

CL300 RF GE10839X012 14B5836X042

CL600 RF GE10842X012 14B5836X052

SCH 40 BWE GE10843X012

SCH 80 BWE GE10844X012

(1)

Tapped Inlet and Tapped Outlet

- - - - - - - - - - -

Table 4. Type EZH Travel Indicator Assemblies Part Numbers

DESCRIPTION MATERIAL NPS 1 / DN 25 NPS 2 / DN 50 NPS 3 / DN 80 NPS 4 / DN 100

Types EZH and EZHSO Nitrile (NBR) ERSA01539A0 ERSA01546A0 ERSA01547A0 ERSA01549A0

1. The assemblies include keys 138, 139, 140, 141, 142B, 143, 144, 145, 160, and 192.

(1)

Type EZH Relief or Backpressure Regulator

Type EZH Main Valve (continued)

Key Description Part Number Key Description Part Number

7* O-ring NPS 1, 2, and 3 / DN 25, 50, and 80 19B2838X012 NPS 4 / DN 100 M6020169X12 8* Anti-Friction Rings (4 required) M0194530X12 9* O-ring (2 required) GD89895X012

10 Pipe Plug 1A767524662 11 Actuator Upper Casing NPS 1 / DN 25 Body GD29722X012 NPS 2 / DN 50 Body GD29695X012 NPS 3 / DN 80 Body GE44420X012 NPS 4 / DN 100 Body M0300760X12 13 Spring NPS 1 / DN 25 Body M0194590X12 NPS 2 / DN 50 Body M0191440X12 NPS 3 / DN 80 Body M0192240X12 NPS 4 / DN 100 Body 14 Sleeve NPS 1 / DN 25 Body GD27423X012 NPS 2 / DN 50 Body GD27260X012 NPS 3 / DN 80 Body GD27631X012 NPS 4 / DN 100 Body 15* O-ring GD89893X012 16 Socket Head Cap Screw NPS 1 / DN 25 Body (6 required) GD89877X012 NPS 2 / DN 50 Body (6 required) 19B0829X012 NPS 3 / DN 80 Body (12 required) GD89872X012 NPS 4 / DN 100 Body (8 required) M5011157X12 17* O-ring GD89894X012 18 Inlet Plate NPS 1 / DN 25 Body M0194440X12 NPS 2 / DN 50 Body M0194620X12 NPS 3 / DN 80 Body M0192080X12 NPS 4 / DN 100 Body M0300020X12 19 Outlet Plate NPS 1 / DN 25 Body M0194480X12 NPS 2 / DN 50 Body M0194660X12 NPS 3 / DN 80 Body M0192120X12 NPS 4 / DN 100 Body M0300030X12 20* Diaphragm NPS 1 / DN 25 Body GD19445X012 NPS 2 / DN 50 Body GD19463X012 NPS 3 / DN 80 Body GD19209X012 NPS 4 / DN 100 Body M0194750X12 21 Cap Screw NPS 1 / DN 25 Body (14 required for Type EZH) 1A361524052 NPS 2 / DN 50 Body (14 required for Type EZH) 1A936224052 NPS 3 / DN 80 Body (14 required for Type EZH) GF05679X012 NPS 4 / DN 100 Body (16 required) M4691022X12

*Recommended Spare Part

2. Parts are not orderable. See sleeve subassembly table if it needs to be replaced.

(2)

M0300740X12

(2)

M0300050X12

22 Plain Washer NPS 1 / DN 25 Body (16 required) 1A518925072 NPS 2 / DN 50 Body (16 required) 1A3517K0012 NPS 3 / DN 80 Body (16 required) 1A519828992 NPS 4 / DN 100 Body (16 required) M5001015X12 23 Hex Nut NPS 1 / DN 25 Body (16 required) 1A341224122 NPS 2 / DN 50 Body (16 required) 1A343324122 NPS 3 / DN 80 Body (16 required) ERCA01576A0 NPS 4 / DN 100 Body (16 required) M4692005X12 24 Continuous Thread Stud Bolt NPS 1, 2, and 3 / DN 25, 50, and 80 Only NPS 1 / DN 25 Body (4 required) GD89876X012 NPS 2 / DN 50 Body (6 required) GE00808X012 NPS 3 / DN 80 Body (4 required) GD89871X012 25 Intermediate Flange NPS 1, 2, and 3 / DN 25, 50, and 80 Only NPS 1 / DN 25 Body GD29724X012 NPS 2 / DN 50 Body GD29580X012 NPS 3 / DN 80 Body GE44403X012 26 Hex Nut NPS 1, 2, and 3 / DN 25, 50, and 80 Only NPS 1 / DN 25 Body (4 required) 1A341224122 NPS 2 / DN 50 Body (6 required) 1A341224122 NPS 3 / DN 80 Body (4 required) GD89867X012 27 Sleeve Adaptor NPS 1 / DN 25 Body GD27425X012 NPS 2 / DN 50 Body GD27257X012 NPS 3 / DN 80 Body GD27634X012 NPS 4 / DN 100 Body 28* O-ring NPS 1, 2, and 3 / DN 25, 50, and 80 Only GD89892X012 29* O-ring GD89891X012 30* Disk Holder Assembly NPS 1 / DN 25 Body Nitrile (NBR) GD28090X012 Fluorocarbon (FKM) GD28213X012 NPS 2 / DN 50 Body Nitrile (NBR) GD28091X012 Fluorocarbon (FKM) GD28214X012 NPS 3 / DN 80 Body Nitrile (NBR) GD28092X012 Fluorocarbon (FKM) GD28215X012 NPS 4 / DN 100 Body Nitrile (NBR) M0299090X12 Fluorocarbon (FKM) M0300120X12 31 Disk Retainer NPS 1 / DN 25 Body GD27416X012 NPS 2 / DN 50 Body GD27275X012 NPS 3 / DN 80 Body GD27625X012 NPS 4 / DN 100 Body M0300100X12 32 Lock Washer NPS 1 / DN 25 Body (1 required) GD89875X012 NPS 2 / DN 50 Body (2 required) 19B0819X012 NPS 3 / DN 80 Body (3 required) GD89870X012 NPS 4 / DN 100 Body (4 required) M5001004X12

(2)

M0300090X12

Type EZH Relief or Backpressure Regulator

“S” PORT

49 49

Figure 6. Type EZH Mounting Assembly

Type EZH Relief or Backpressure Regulator

Type EZH Main Valve (continued)

Key Description Part Number Key Description Part Number

33 Socket Head Cap Screw NPS 1 / DN 25 Body (1 required) GD89874X012 NPS 2 / DN 50 Body (2 required) 18B5515X012 NPS 3 / DN 80 Body (3 required) GD89869X012 NPS 4 / DN 100 Body (4 required) M5011018X12 34* O-ring GD89880X012 35 Bracket or Eyebolt (2 required) NPS 1 / DN 25 Body - Bracket GD22096X012 NPS 2 / DN 50 Body - Bracket GD27857X012 NPS 3 / DN 80 Body - Eyebolt GD89866X012 NPS 4 / DN 100 Body - Eyebolt M5095001X12 36 Nameplate - - - - - - - - - - 37 Drive Screw (2 required) - - - - - - - - - - 38 Travel Indicator Plug NPS 1, 2, and 3 / DN 25, 50, and 80 Bodies GD29768X012 NPS 4 / DN 100 Body M0303680X12 39 Long Bolt (2 required) NPS 1 / DN 25 Body GE07221X012 NPS 2 / DN 50 Body GE00606X012 NPS 3 / DN 80 Body ERCA01574A0 43 Caution/Warning Label NPS 1, 2, and 3 / DN 25, 50, and 80 Bodies (2 required) - - - - - - - - - - NPS 4 / DN 100 (1 required) - - - - - - - - - - 44 Adjusting Screw Cap NPS 1 / DN 25 24B1301X012 NPS 2 / DN 50 24B1301X012 NPS 3 and 4 / DN 80 and 100 Bodies 24B1301X012 59 Flow Arrow NPS 1 / DN 25 Body 1V105938982 NPS 2 / DN 50 Body 1V106038982 NPS 3 / DN 80 Body 1V106038982 NPS 4 / DN 100 Body 1V106038982 60 Protective Cap (2 required) NPS 1, 2, and 3 / DN 25, 50, and 80 Bodies Only NPS 1 / DN 25 Body T13659T0102 NPS 2 / DN 50 Body T13659T0072 NPS 3 / DN 80 Body T13659T0102 61 Sleeve Guide

NPS 4 / DN 100 Body Only M0300360X12 62* O-ring NPS 1, 2, and 3 / DN 25, 50, and 80 Bodies Only M6020082X12 63* O-ring M6020172X12 64* O-ring M6020139X12

66 Socket Head Set Screw NPS 4 / DN 100 Body Only (8 required) M5021047X12 67 Crush Washer NPS 4 / DN 100 Body Only (8 required) M4501738X12 68 Special Screw NPS 4 / DN 100 Body Only (8 required) M0300040X12 69* O-ring M6020149X12 70 Cap NPS 4 / DN 100 M0299980X12 71* O-ring M6020175X12 72 Locking Nut NPS 4 / DN 100 Body Only

(3)

M0300060X12 73 Upper Spring Seat NPS 4 / DN 100 Body Only

(3)

M0300070X12 74 Hex Socket Cap Screw NPS 4 / DN 100 Body Only M5011135X12 75* O-ring M6020117X12 77 Screw NPS 4 / DN 100 Body Only (8 required) M5009048X12 78 Cage

(1)

NPS 4 / DN 100 Body Only Standard M0303260X12 82 Lower Spring Seat NPS 4 / DN 100 Body Only

(3)

M0300080X12 83 Ball Bearing (2 required) NPS 4 / DN 100 Body Only

(3)

M4500574X12 138 Indicator Cover M0194580X12 139 Travel Indicator Stem ERSA01803A0 140 Indicator Bushing ERSA02798A0 141 Travel Indicator Fitting ERSA02569A0 142A* O-ring Nitrile (NBR) M6010001X12 Fluorocarbon (FKM) M6020066X12 142B* O-ring Nitrile (NBR) 1H2926X0032 Fluorocarbon (FKM) 1H2926X0022 143* O-ring M6020005X12 144 Spring Collet M019218X012 145 Retaining Ring M4500325X12 159 Check Valve 15A6011E182 192 Travel Indicator Scale M0201990X12

*Recommended Spare Part

1. When retrotting a Type EZH with pins with the new cage, it’s also necessary to order

the Seat Ring.

3. Included also in sleeve subassembly.

Type EZH Relief or Backpressure Regulator

1413

TYPE PRX/182 PILOT ASSEMBLY SECTION A - A

1413

Figure 7. Type PRX/182 Pilot Assemblies

PRX Series Mounting Parts

Key Description Part Number

45 Bleed Orice GE01698X012 46 Pipe Nipple GE13860X012 47 Pipe Nipple 1C488226232 48 Tube Elbow Steel Fitting 15A6002XW32 Stainless steel Fitting 15A6002X612 49 Male Tube Connector Steel Fitting 15A6002XW22 Stainless steel Fitting 15A6002X602 51 Pipe Cross 1L3719X0012 52 Tubing 0500213809W

*Recommended Spare Part

PRX Series Pilot Parts List

Key Description Part Number

Parts Kits (includes keys 4, 5, 14, 17, 18, 25, and 28) Type PRX/182 Nitrile (NBR) RPRX00X0N12 Fluorocarbon (FKM) RPRX00X0F12

1 Adjusting Screw GD25334X012 2 Locknut GD03600X012 3 Cap GD25335X012 4* Spring Case O-ring Nitrile (NBR) GD01017X012 Fluorocarbon (FKM) GD01017X022 5* O-ring Nitrile (NBR) GD01000X012 Fluorocarbon (FKM) GD01000X022

Type EZH Relief or Backpressure Regulator

PRX Series Pilot Parts List (continued)

Key Description Part Number

6 Upper Spring Seat GD25336X012 7 Spring See Table 2 8 Spring Case GD29854X012 9 Spring Carrier Plate GD25338X012 10 Machine Screw M5011018X12 11 Washer GD05500X012 12 Filter GD50036X012 13 Diaphragm Plate GD25339X012 14* Diaphragm Nitrile (NBR) GG05785X012 Fluorocarbon (FKM) GG05785X022 15 Diaphragm Plate GD25341X012 16 Body GD25331X012

17* Orice O-ring

Nitrile (NBR) GD02012X012 Fluorocarbon (FKM) GD02012X022 18* Lower Cover O-ring Nitrile (NBR) GD01009X012 Fluorocarbon (FKM) GD01009X022

19 Orice GD25344X012

*Recommended Spare Part

Key Description Part Number

20 Nut GD00200X012 21 Lower Cover GD29860X012 22* Disk Holder Nitrile (NBR) GD25340X012 Fluorocarbon (FKM) M0279950X12 23 Stem GD25343X012 24 Nameplate GD26808X012 25* Stem O-ring Nitrile (NBR) GD01022X012 Fluorocarbon (FKM) GD01022X022 26 Upper Diaphragm Nut GD02800X012 27 Damper Adjusting Screw with Hole GD25348X012 28* Restrictor/Damper O-ring GD02005X022 29 Damper/Restrictor Plate Types PRX/182 and PRX-AP/182 GD25440X012 Types PRX/182 and PRX-AP/182 GD25793X012 31 Nameplate Screw GD06100X012 33 Plug (Type PRX/182) GD50032X012 34 Plug (Type PRX/182) GD25792X012 35 Spring Barrel Extension for AP GD27410X012

Industrial Regulators

Emerson Process Management Regulator Technologies, Inc.

USA - Headquarters McKinney, Texas 75069-1872, USA Tel: +1 800 558 5853 Outside U.S. +1 972 548 3574

Asia-Pacic

Shanghai 201206, China Tel: +86 21 2892 9000

Europe Bologna 40013, Italy Tel: +39 051 419 0611

Middle East and Africa Dubai, United Arab Emirates Tel: +971 4811 8100

For further information visit www.emersonprocess.com/regulators

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Natural Gas Technologies

Emerson Process Management Regulator Technologies, Inc.

USA - Headquarters McKinney, Texas 75069-1872, USA Tel: +1 800 558 5853 Outside U.S. +1 972 548 3574

Asia-Pacic

Singapore 128461, Singapore Tel: +65 6770 8337

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TESCOM

Emerson Process Management Tescom Corporation

USA - Headquarters Elk River, Minnesota 55330-2445, USA Tels: +1 763 241 3238 +1 800 447 1250

Europe Selmsdorf 23923, Germany Tel: +49 38823 31 287

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Shanghai 201206, China Tel: +86 21 2892 9499

Emerson Fisher EZH Series Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual