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Instruction Manual
September 2013
Type EZH Relief or Backpressure Regulator
Figure 1. Type EZH Regulator
WARNING
!
Failure to follow these instructions or to
properly install and maintain this equipment
could result in an explosion and/or fi 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 qualifi 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 pilot-
operated 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
Type EZH
TYPE PRX/182
Figure 2. PRX Series Pilot
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Table of Contents
Related Manuals for Emerson Fisher EZH Series
Summary of Contents for Emerson Fisher EZH Series
- Page 1 ® must be installed, operated, and maintained Product Description in accordance with federal, state, and local codes, rules and regulations, and Emerson Process Management Regulator Technologies, Type EZH relief valve or backpressure regulator is pilot- Inc. (Regulator Technologies) instructions. operated and designed for use in high pressure natural gas...
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Page 2: Specifications
Type EZH Relief or Backpressure Regulator Specifi cations Ratings and specifi cations for the Type EZH are listed in the Specifi cations section below. Specifi cations for specifi c relief valve or backpressure regulator constructions are stamped on a nameplate attached to either the main actuator or the pilot spring case. -
Page 3: Principle Of Operation
Type EZH Relief or Backpressure Regulator Table 1. Main Valve Body Sizes, End Connection Styles, and Body Ratings MAIN VALVE BODY SIZE STRUCTURAL DESIGN RATING MAIN VALVE BODY MATERIAL END CONNECTION STYLE psig NPT or SWE 1500 CL150 RF 20.0 CL300 RF 51.7 CL600 RF or BWE... -
Page 4: Installation
Type EZH Relief or Backpressure Regulator Type EZH CAUTION Type EZH Single-Pilot Relief Valve or Backpressure Regulator When installing Type EZH trim in an existing Fisher E-body, damage can result if flow is not ® Type EZH Adjustment in the correct direction. Look at the body web to confirm that flow is in the correct direction—... -
Page 5: Startup And Shutdown
Type EZH Relief or Backpressure Regulator 6. The Type PRX/182 pilot spring case vent (key 12, Shutdown Figure 7) must be kept open to atmospheric pressure. 1. Close upstream block valve first and then close the Protect the vent assembly from icing, moisture, or debris downstream block valve. - Page 6 Type EZH Relief or Backpressure Regulator Table 3. Torque Specifications TORQUE SPECIFICATIONS Body Size PART NAME 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...
- Page 7 Type EZH Relief or Backpressure Regulator L2 L2 L2 L2 L2 8 10 9 8 15 16 17 18 19 20 13 14 TOP VIEW 142B IMPROVED TRAVEL VERSION WITHOUT FOR NPS 1 / DN 25 FOR NPS 3 / DN 80 INDICATOR DETAIL TRAVEL INDICATOR EZH SERIES...
- Page 8 Type EZH Relief or Backpressure Regulator L2 L2 L2 L2 L2 15 16 17 18 19 20 13 14 59 37 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 21.
- Page 9 Type EZH Relief or Backpressure Regulator NPS 1 through 3 / DN 25 through 80 10. Lightly lubricate the O-rings (keys 15 and 17) and the inner and outer diaphragm (key 20) edges. Place the Actuator Assembly Maintenance inlet plate (key 18) and the diaphragm (key 20) on the (Refer to Figure 4) sleeve (key 14).
- Page 10 Type EZH Relief or Backpressure Regulator TRAVEL INDICATOR DETAIL VERSION WITHOUT TRAVEL INDICATOR DETAIL 10 83 73 72 142B NPS 4 / DN 100 MLM1945_B 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.
- Page 11 Type EZH Relief or Backpressure Regulator 73 72 MLM1945_B NPS 4 / DN 100 Figure 4. Type EZH Main Valve Assembly (continued) 3. Unscrew 8 special screws (key 68). Unscrew eye bolts 10. Place cage (key 78) on the top of seat ring (key 2). (key 35) from the cap and unscrew 8 screws (key 77) 11.
- Page 12 Type EZH Relief or Backpressure Regulator TOP VIEW TOP VIEW 142A 142B LEGACY TRAVEL INDICATOR DETAIL IMPROVED 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. Figure 5.
- Page 13 Type EZH Relief or Backpressure Regulator 1. Remove plastic travel indicator cover (key 138). 6. Lightly lubricate the rims of the diaphragm (key 14) and place it on top of the lower diaphragm plate (key 15). Set 2. Loosen travel indicator bushing (key 140) and remove it the diaphragm plate (key 13) on the diaphragm (key 14).
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Page 14: Parts Ordering
Type EZH Relief or Backpressure Regulator 12. Place washers (key 11) and uniformly tighten the Key Description Part Number machine screws (key 10) to hold the body (key 24) and Type EZH spring case (key 8) together. NPS 1 / DN 25 Nitrile (NBR) and Fluorocarbon (FKM) REZH1X00N22 13. - Page 15 Type EZH Relief or Backpressure Regulator Key 1, Type EZH Main Valve Body Part Numbers BODY SIZE BODY STYLE BODY MATERIAL END CONNECTION STYLE Standard or Tapped Inlet Tapped Inlet and Tapped Outlet (Pilot Supply) GE11518X012 - - - - - - - - - - - Cast iron CL125 FF GE11528X012...
- Page 16 Type EZH Relief or Backpressure Regulator Type EZH Main Valve (continued) Key Description Part Number Key Description Part Number O-ring Plain Washer NPS 1, 2, and 3 / DN 25, 50, and 80 19B2838X012 NPS 1 / DN 25 Body (16 required) 1A518925072 NPS 4 / DN 100 M6020169X12...
- Page 17 Type EZH Relief or Backpressure Regulator “S” PORT Figure 6. Type EZH Mounting Assembly...
- Page 18 Type EZH Relief or Backpressure Regulator Type EZH Main Valve (continued) Key Description Part Number Key Description Part Number Socket Head Cap Screw Socket Head Set Screw NPS 1 / DN 25 Body (1 required) GD89874X012 NPS 4 / DN 100 Body Only (8 required) M5021047X12 NPS 2 / DN 50 Body (2 required) 18B5515X012...
- Page 19 Type EZH Relief or Backpressure Regulator TYPE PRX/182 PILOT ASSEMBLY SECTION A - A Figure 7. Type PRX/182 Pilot Assemblies PRX Series Mounting Parts PRX Series Pilot Parts List Key Description Part Number Key Description Part Number Parts Kits Bleed Orifice GE01698X012 (includes keys 4, 5, 14, 17, 18, 25, and 28) Pipe Nipple...
- Page 20 For further information visit www.emersonprocess.com/regulators 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.