Table of Contents
Advertisement
Quick Links
Instruction Manual
D104251X012
August 2019
Type EZL Relief Valve or Backpressure Regulator
Introduction
Scope of the Manual
This manual provides installation, startup, maintenance and
parts ordering information for the Type EZL relief valve or
backpressure regulator. Information on other equipment
used with this regulator is found in separate manuals.
Figure 1. Type EZL Relief or Backpressure Regulator
Product Description
Type EZL relief valves or backpressure regulators are
accurate pilot-operated, pressure balanced and soft seated
regulators. They are designed for use in natural gas
distribution applications such as district regulating stations
and commercial/industrial meter sets. They provide low
differential, smooth, reliable operation, tight shutoff and
long life.
Type EZL
W8962
Advertisement
Table of Contents
Related Manuals for Emerson Fisher EZL Series
Summary of Contents for Emerson Fisher EZL Series
- Page 1 Instruction Manual Type EZL D104251X012 August 2019 Type EZL Relief Valve or Backpressure Regulator W8962 Figure 1. Type EZL Relief or Backpressure Regulator Introduction Scope of the Manual Product Description This manual provides installation, startup, maintenance and Type EZL relief valves or backpressure regulators are parts ordering information for the Type EZL relief valve or accurate pilot-operated, pressure balanced and soft seated backpressure regulator.
-
Page 2: Specifications
Type EZL Specifications The Specifications section lists the specifications for Type EZL relief valve or backpressure regulator. Factory specifications for specific relief valve or backpressure regulator constructions are stamped on the nameplate fastened to either the main actuator or the pilot spring case. Body Sizes, End Connection Styles and Minimum Differential Pressure Pressure Ratings... -
Page 3: Principle Of Operation
Type EZL TYPE 6358 PILOT TYPE EZL MAIN VALVE M1161_08/2015 INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE LOADING PRESSURE Figure 2. Type EZL Relief Valve or Backpressure Regulator Principle of Operation exhausts gas when the inlet pressure is above the set pressure. -
Page 4: Installation
Type EZL While the main valve is throttling, the upper port of the pilot WARNING 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 When used in relief valve service, the valve plug down to close the lower port and open the upper Type EZL main valve and pilot both exhaust... -
Page 5: Maintenance
(heat treating, dimensional tolerances, etc.), use only replacement The maximum inlet pressure for specific parts manufactured or furnished by Emerson. Also when constructions are given in Specifications lubrication is required, use a good quality lubricant and section. - Page 6 Type EZL 6. Remove the O-ring (key 29). Inspect for damage or wear 6. Remove O-ring (key 7). Inspect the O-ring for damage and replace if necessary. Lightly lubricate O-ring before or wear and replace if necessary. Lightly lubricate O-ring placing in the sleeve adaptor (key 27).
-
Page 7: Pilot Maintenance
Type EZL Table 3. Torque Specifications INDICATOR STUD NUTS SOCKET HEAD CAP CAP SCREWS CAP SCREWS SOCKET HEAD CAP FITTING (KEY 56) BODY SIZE (KEY 26), SCREWS (KEY 16) (KEYS 21 AND 39), (KEY 6), SCREWS (KEY 33) (1)(2) OR PLUG (KEY 38), FT-LBS / N•m FT-LBS / N•m FT-LBS / N•m... - Page 8 Type EZL TOP VIEW TOP VIEW LEGACY TRAVEL INDICATOR DETAIL IMPROVED TRAVEL INDICATOR DETAIL P1765 APPLY LUBRICANT (L) OR SEALANT (S) L1 = LITHIUM HYDROXYSTEGRATE NLGI 2 GRADE GREASE S1 = ANAEROBIC METHACRYLATE SEALANT FOR NUTS AND BOLTS 1. Lubricant and sealant must be selected such that they meet the temperature requirements. Figure 3.
-
Page 9: Parts Ordering
Type EZL 3. If the restriction or restriction plug (key 20) was Description Part Number removed, coat the threads with lubricant and install it. Disk Parts Kits (continued) 4. If replacing the stem O-ring (key 37), sparingly apply 2 in. / DN 50, Fluorocarbon (FKM) REZL2X00F12 3 in. - Page 10 Type EZL Type EZL Main Valve (Figure 4) (continued) Description Part Number O-ring Description Part Number 2 in. / DN 50 M6020095X12 3 and 4 in. / DN 80 and 100 M6020073X12 Body (continued) Socket Head Cap Screw (6 required) 4 in.
-
Page 11: Mounting Parts
Type EZL Type EZL Main Valve (Figure 4) (continued) 6358 Series Pilot (Figures 5 and 6) Description Part Number Description Part Number Socket Head Cap Screw (2 required) Parts Kit (included are keys 4, 5, 13, 14, 19, 2 in. / DN 50 M5011006X12 36, 37 and P590 Series Filter, keys 2 and 7) 3 and 4 in. - Page 12 Type EZL 6358 Series Pilot 6358 Series Pilot (Figures 5 and 6) (continued) (Figures 5 and 6) (continued) Description Part Number Description Part Number Spring Seat, Zinc-plated steel Stem O-ring Types 6358 and 6358B 1B798525062 Nitrile (NBR) 16A2920X012 Type 6358EB or 6358EBH 17B0515X012 Fluorocarbon (FKM) 16A2920X022...
- Page 13 Type EZL GE10987 DETAIL A.2 DETAIL A.1 2 AND 3 IN. / DN 50 AND 80 4 IN. / DN 100 BODY SIZE ONLY BODY SIZES ONLY APPLY LUBRICANT (L) OR SEALANT (S) L1 = LITHIUM HYDROXYSTEGRATE NLGI 2 GRADE GREASE S1 = ANAEROBIC METHACRYLATE SEALANT FOR NUTS AND BOLTS S2 = ANAEROBIC METHACRYLATE SEALANT FOR THREADS S3 = MULTI-PURPOSE POLYTETRAFLUOROETHYLENE (PTFE) THREAD SEALANT...
- Page 14 Type EZL GE10987-8 Figure 4. Type EZL Main Valve Assembly (continued) B2619-2_6365 TYPE 6358B PILOT INTERIOR VIEW APPLY SEALANT (S) Figure 5. Types 6358B Pilot Assembly...
- Page 15 Type EZL 48B4849_A APPLY SEALANT (S) TYPE 6358EB PILOT INTERIOR VIEW 48B3430_A TYPE 6358EB PILOT WITH DIAPHRAGM LIMITER FOR 180 TO 350 psig / 12.4 TO 24.1 bar SET PRESSURE RANGE INTERIOR VIEW Figure 6. Types 6358EB Pilot Assembly...
- Page 16 Technologies, Inc. All rights reserved. 08/19. Emerson Automation Solutions 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...