Emerson Fisher H200 Series Manuel utilisateur

Figure 1. H200 Series Relief Valve

H200 Series External Relief Valves

▲ WARNING

Failure to follow these instructions or

to properly install and maintain this

equipment could result in an explosion,

fire and/or fire causing property damage

and personal injury or death.

Fisher™ relief valves must be installed,

operated and maintained in accordance

with federal, state and local codes, rules

and regulations and Emerson Process

Management Regulator Technologies Inc.

(Emerson) instructions.

A person should never stand directly

over or in front of or look directly into a

relief valve when the tank is pressurized.

The relief valve could suddenly “pop”

open blowing gas, dirt and other debris

into the person’s face and eyes.

Call a qualified service person to service

the unit. Installation, operation and

maintenance procedures performed

by unqualified person may result

in improper adjustment and unsafe

operation. Either condition may result in

equipment damage or personal injury.

Only a qualified person shall install or

service the relief valve.

Introduction

Scope of the Manual

This manual provides specications, installation,

maintenance instructions and parts ordering

information for the H200 Series.

Only personnel qualied through training or experience

should install, operate and maintain this relief valve. If

there are any questions concerning these instructions,

contact your local Emerson Impact Partner O󰀩ce

before proceeding.

Product Description

The H200 Series Pop™ relief valves, Figures 1 and 2,

are self-operated relief valves with preset and pinned

spring retainers. The inlet pressure registers directly

on a spring opposed poppet assembly which includes

a Nitrile (NBR) disk. When the inlet gas pressure

increases above the spring setting, the poppet and disk

assembly is pushed away from the orifice. Springs

are available that provide any relief pressure setting

from 25 to 300 psig / 1.7 to 20.7 bar.

With this simple operation and wide spring setting

selection, the H200 Series Pop relief valves

may be used where venting to atmosphere is

acceptable, where the process gas is compatible

with the Nitrile (NBR) disk, where its relief capacity

is adequate and where some pressure relieving

tolerance is acceptable. Common applications

include use on pneumatic control lines of air drills,

jackhammers and other similar equipment and on

farm tap installations. The H200 Series is comprised

of the Types H202 and H203 relief valves with the

di󰀨erence being in the inlet connection size.

Instruction Manual

D104657X012

August 2023

H200 Series

Specifications

This section lists the specications for H200 Series external relief valves. Factory specications are engraved on

the body of the relief valve at the factory.

Available Configuration and End Connections

Type H202: 3/4 NPT connection

Type H203: 1 NPT connection

Maximum Allowable Relief (Inlet) Pressure(1)

400 psig / 27.6 bar

Relief Pressure Ranges(1)

See Tables 1 and 2

Flow Capacity

See Table 2

Construction Materials

Body, Poppet and Spring Retainer: Brass

Disk: Nitrile (NBR)

Spring: 302 Stainless steel

Temperature Capabilities(1)

-20 to 160°F / -29 to 71°C

Approximate Weight

0.5 lbs / 0.2 kg

Option

Type P145 raincap

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

Table 1. Relief Pressure Spring Ranges

RELIEF PRESSURE SETTINGS SPRING

PART NUMBER SPRING COLOR RELIEF SETTING TOLERANCE

psig bar psig bar

25 to 30 1.7 to 2.1 1H485637022 Pink ±5 ±0.34

31 to 55 2.1 to 3.8 1J152137022 White

56 to 70 3.9 to 4.8 1P391137022 Blue

±8 ±0.5565 to 95 4.5 to 6.5 T1049037022 Plain

90 to 130 6.2 to 9.0 1F791337022 Purple

131 to 160 9.0 to 11.0 1F7912T0012 Yellow

±15 ±1.03

161 to 190 11.1 to 13.1 T12699T0012 Green

191 to 235 13.2 to 16.2 1F790937022 Brown

236 to 300 16.3 to 20.7 1E954637052 Plain

Table 2. Relief Set Pressures and Capacities

RELIEF SET PRESSURE(1) SET PRESSURE PLUS BUILD-UP FLOW CAPACITY(2)

psig bar psig bar SCFH Nm3/h

25 1.7 50 3.4 34,200 916

50 3.4 75 5.2 47,400 1270

75 5.2 100 6.9 60,000 1608

100 6.9 120 8.3 69,600 1865

125 8.6 150 10.3 83,400 2235

150 10.3 180 12.4 100,500 2693

175 12.1 210 14.5 117,600 3152

200 13.8 240 16.5 132,000 3538

225 15.5 270 18.6 150,000 4020

250 17.2 300 20.7 165,000 4422

275 19.0 330 22.7 180,000 4824

300 20.7 360 24.8 195,000 5226

1. This is the initial leak point, the point at which the relief valve begins to discharge.

2. 0.6 Specific Gravity Gas. To convert to equivalent capacities of other gases, multiply the table values by 0.775 for air or 0.789 for nitrogen. Multiply the flow obtained by 0.0268 to convert

to (Nm3/h) at 0°C and 1.01 bar.

H200 Series

Figure 2. H200 Series Operational Schematics

W0120_1

Principle of Operation

The relief valve (See Figure 1) is held close by the

spring force seating the rubber valve disc against

the orifice.

When the tank pressure exceeds the spring force, the

valve disc lifts off the orifice allowing gas to discharge

through the valve to the air.

Gas discharge initially may be small producing only

seepage and a light “hissing” sound. As pressure

increases and gas volume discharge continues, a

“popping” condition occurs with large volumes of gas

discharge and a loud “hissing or roaring” sound.

When the tank pressure decreases enough, the

spring force closes the valve disc back against the

orifice stopping further discharge

Installation

▲ WARNING

Vapor relief valves must be installed

only in the vapor space to provide relief

capacity for the tank.

This relief valve may be installed in any position but

must be oriented so that gas discharged from the

valve does not create a re, toxic or explosion hazard.

The relief valve should be protected from material and

conditions that could clog the outlet side of the valve

and a󰀨ect the venting of gas.

A typical installation is shown in Figure 3. A Type P145

raincap is recommended for use with any H200 Series

relief valve.

The relief valve and installation should be checked for

compliance with all applicable codes.

Maintenance

Safety relief valves are non-repairable valves and

cannot be adjusted in the field.

▲ WARNING

Any valve that has fully opened “popped”

should be tested to see if it is within the

allowable start-to-discharge pressure

setting. If it is not within the correct

range, it must be replaced. Relief

valve start-to-discharge and reseat

pressures may be lower if the valve has

fully opened (popped).

It is recommended that all relief valves be regularly

inspected for visible damage, dirt, corrosion, missing

raincaps, paint inside outlet, tampering, etc. If any of

the preceding is evident or questionable, the valve

should be re-tested or replaced immediately.

The discharge side of the relief valve body must be

kept free of dirt, water and other foreign matter which

can damage the valve seat or “weld” some “wing style”

poppets to the valve body. This can prevent the valve

from opening. Replace valves when this occurs.

H200 SERIES

RELIEF VALVE

TYPE P145 RAIN CAP

LOW-PRESSURE

REDUCING REGULATOR

HIGH-

PRESSURE

REDUCING

REGULATOR

INLET PRESSURE

Figure 3. Typical Farm Tap Installation

AF9930-C

A1619-1

H200 Series

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 informational purposes

only, and while every e󰀨ort 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. All sales are governed by our terms and conditions, which

are available upon request. 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.

Parts Ordering

When corresponding with your local Sales Office

about this relief valve, include the type number,

serial number and other information stamped on

the nameplate.

When ordering replacement parts, reference the key

number of each needed part and specify the eleven

character part number as found in the following

parts list.

Parts List

Key Description Part Number

1 Body

2 Spring Retainer

3 Groove Pin

4* Spring

5 Poppet Assembly

H200 Series

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Fisher.com

Emerson Automation Solutions

Americas

McKinney, Texas 75070 USA

T +1 800 558 5853

+1 972 548 3574

Europe

Bologna 40013, Italy

T +39 051 419 0611

Asia Pacic

Singapore 128461, Singapore

T +65 6777 8211

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T +971 4 811 8100

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