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Introduction

This installation guide provides instructions for installation, 

startup and adjustment. To receive a copy of the 

instruction manual, contact your local Sales Office or view 

a copy at www.fisher.com. For further information refer to: 

Type EZR Relief Instruction Manual, D102629X012.

P.E.D. Categories

This product may be used as a pressure accessory with 

pressure equipment in the following Pressure Equipment 

Directive categories. It may also be used outside of the 

Pressure Equipment Directive using sound engineering 

practice (SEP) per table below. For information on the 

current PED revision see Bulletin: 

D103053X012.

PRODUCT SIZE

CATEGORIES

FLUID GROUP

DN 25, 50, 80, 100 and 150 /

NPS 1, 2, 3, 4 and 6

III

1

Specifications 

Main Valve Body Size, End Connection Styles  

and Body Ratings

(1)

See Table 1

Maximum Relief (Inlet) Pressure

(1)

See Tables 2 and 5

Minimum Relief Set Pressure

(1)

1.4 bar / 20 psig

Set Pressure Control Ranges

See Table 2

Temperature Capabilities

(1)

See Table 4

Installation

!

WARNING

Only qualified personnel should install 

or service a backpressure regulator. 

Backpressure regulator should be 

installed, operated and maintained 

in accordance with international and 

applicable codes and regulations 

and Emerson Process Management 

Regulator Technologies, 

Inc. instructions.

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

If using a backpressure regulator on a 

hazardous or flammable fluid service, 

personal injury and property damage 

could occur due to fire or explosion of 

vented fluid that may have accumulated. 

To prevent such injury or damage, 

provide piping or tubing to vent the 

fluid to a safe, well-ventilated area or 

containment vessel. Also, when venting 

a hazardous fluid, the piping or tubing 

should be located far enough away 

from any buildings or windows so to 

not create a further hazard, and the vent 

opening should be protected against 

anything that could clog it.

Personal injury, equipment damage 

or leakage due to escaping fluid or 

bursting of pressure-containing parts 

may result if this backpressure regulator 

is overpressured or is installed where 

service conditions could exceed the limits 

given in the Specifications 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 

backpressure regulator could result in 

personal injury and property damage due 

to escaping fluid. To avoid such injury and 

damage, install the backpressure regulator 

in a safe location.

Clean out all pipelines before installation of the 

backpressure regulator and check to be sure the 

backpressure regulator has not been damaged or has 

collected foreign material during shipping. For NPT 

bodies, apply pipe compound to the external pipe 

threads. For flanged bodies, use suitable line gaskets 

and approved piping and bolting practices. Install the 

backpressure regulator in any position desired, unless 

otherwise specified, but be sure flow through the body 

is in the direction indicated by the arrow on the body.

Type EZR Relief

Installation Guide

D102629X014
English – October 2015

Summary of Contents for Fisher EZR Relief

Page 1: ...of vented fluid that may have accumulated To prevent such injury or damage provide piping or tubing to vent the fluid to a safe well ventilated area or containment vessel Also when venting a hazardous fluid the piping or tubing should be located far enough away from any buildings or windows so to not create a further hazard and the vent opening should be protected against anything that could clog ...

Page 2: ... 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 if applicable MAIN VALVE BODY SIZE MAIN VALVE BODY MATERIAL END CONNECTION STYLE STRUCTURAL DESIGN RATING DN NPS bar psig 50 80 100 and 150 2 3 4 and 6 Cast Iron NPT NPS 2 DN 50 only 27 6 400 CL125 FF 13 8 200 ...

Page 3: ... T14184T0012 Yellow 2 17E68 and 17E88 0 69 10 0 83 12 0 97 14 1 7 25 1 7 25 1 7 25 18B8501X012 Green 17E97 1 1 16 1 2 17 1 5 21 2 3 34 2 3 34 2 3 34 17E68 and 17E88 1 1 16 1 2 17 1 4 20 2 1 30 2 1 30 2 1 30 18B8502X012 Red 3 17E88 and 17E97 1 5 21 1 7 24 1 8 26 2 8 40 2 8 40 2 8 40 150 6 19B0364X012 Yellow 2 17E97 0 69 10 0 76 11 0 97 14 0 83 12 1 1 16 1 1 16 17E88 0 69 10 0 90 13 0 90 13 0 83 12 ...

Page 4: ...c hydrocarbon content resistance 6 9 100 6 9 100 6 9 100 Yellow 34 5 500 34 5 3 500 51 7 750 Light Blue 51 7 750 34 5 3 500 51 7 750 Black 2 100 4 17E68 Nitrile NBR Low temperature 6 9 100 6 9 100 6 9 100 Yellow 24 8 360 20 7 300 34 5 500 Green 17E97 Nitrile NBR High pressure and or erosion resistance 34 5 500 34 5 500 72 4 1050 Green 72 4 1050 55 2 800 72 4 1050 Red 2 17E88 Fluorocarbon FKM High ...

Page 5: ...Bushing DN 150 and 200 NPS 6 and 8 only 6358 Series Pilots Key Description 1 Pilot Body 2 Spring Case 3 Body Plug 4 Valve Plug 5 Diaphragm Assembly 6 Connector Cap 7 Control Spring 8 Spring Seat 9 Stem Guide 10 Adjusting Screw 11 Locknut 12 Closing Cap 13 Body Plug O ring 14 Valve Spring 15 O ring Type 6358EBH only 16 Vent Assembly Type Y602X1 A12 17 Machine Screw 18 O ring Types 6358EB and 6358EB...

Page 6: ...R Main Valve with Travel Indicator TOP PLUG KEY 5 O RING KEY 14 DN 25 NPS 1 DIAPHRAGM ASSEMBLY O RING KEY 70 DIAPHRAGM KEY 9 BOTTOM PLUG KEY 11 O RING KEY 10 LOCK WASHER KEY 130 SOCKET HEAD SCREW KEY 129 19B2408 8 7 5 11 10 70 14 2 17 19 20 21 22 15 4 6 18 16 64 12 28 9 13 1 23 Type EZR Relief 6 ...

Page 7: ...OR VIEW A6920 2 Figure 2 Type EZR Travel Indicator Plug Option 19 3 48B2142_C 3 DN 25 50 80 AND 100 NPS 1 2 3 AND 4 BODY SIZES DN 150 NPS 6 BODY SIZE 6358 SERIES PILOT INTERIOR VIEW A6920 TYPE 6358EB PILOT INTERIOR VIEW B2620 2 10 12 11 2 6 14 20 16 4 1 13 8 18 5 38 9 36 37 16 3 7 12 10 19 8 6 5 14 9 37 3 13 1 4 20 16 36 7 2 11 Type EZR Relief 7 ...

Page 8: ... 811 8100 D102629X014 2002 2018 Emerson Process Management Regulator Technologies Inc All rights reserved 06 18 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 Automation Solutions The contents of this publication are presented for i...

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