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Bulletin 71.4:63EG-98HM

December 2014

D102628X012

www.fisherregulators.com

Type 63EG-98HM Pilot-Operated Relief Valve or

Backpressure Regulator

W6866

Figure 1. Type 63EG-98HM Pilot-Operated Relief Valve or

Backpressure Regulator

Introduction

The Type 63EG-98HM can be used for gas, liquid

or steam applications. For applications up to 550°F /

288°C, the Type 63EG-98HM utilizes high temperature

Ethylenepropylene (EPR) or Per uoroelastomer (FFKM)

for Class VI shutoff. If used in a corrosive service,

Per uoroelastomer (FFKM) and other elastomers are

available options that offer superior resistance to heat and

most corrosive chemicals.

When using the Type 63EG-98HM with a corrosive liquid,

usually water or a water-containing solution, the valve

materials must be selected with care. For aqueous solutions,

use a Stainless steel linear cage or Whisper Trim™ III Cage

and body  ange to ensure valve plug travel on a corrosion-

free surface.

The Type 63EG-98HM is not an ASME certi ed device.

Features

• Variety of Construction Materials—WCC steel and

CF8M Stainless steel are standard constructions.

Alloy 20, Hastelloy

C and Monel

are available options

upon request.

• Low Build-up Capability—Minimal build-up pressure is

required for main valve to achieve wide-open  ow.

• Chemically Compatible Elastomers—

Per uoroelastomer (FFKM) is available for corrosive

chemical applications.

• No Assembly Adjustments Required—Precise

machining ensures that the main valve plug shuts off at

both the port and upper seals at the same time.

• Fast Speed of Response—High gain piloting system for

faster response than standard piloting system.

• Excellent Overpressure Protection—Superior pump

bypass regulator for overpressure protection in pump

recirculation applications.

• NACE Availability—Optional materials available for

applications handling sour gases. These constructions

comply with recommendations of the NACE International

standards MR0175 and/or MR0103.

• Tight Shutoff—Elastomer seats for Class VI shutoff on

high temperature applications to 550°F / 288°C.

• Easily Converted to Differential Control—The pilot

is ready for differential backpressure control with the

addition of a sealing washer on the adjusting screw.

• Labor-Saving Trim—Main valve body can stay in-line

during maintenance. Tested trim packages can be made

up and stocked ahead of time for fast replacement.

• Versatility in Both Liquid and Gas Service—The

pilot exhaust port and standard tapped pilot spring

case each come with removable vent for remote piping

when necessary. The standard tapped pilot spring case

comes with an optional gasketed closing cap that permits

pressure loading for remote pneumatic adjustment of the

set pressure. For remote upstream registration, the pilot

supply tubing may be disconnected at the 1/4 NPT main

valve body tapping and this tapping plugged.

Hastelloy

C is a mark owned by Haynes International, Inc.

Monel

is a mark owned by Special Metals Corporation

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Bulletin 71.4:63EG-98HM 2

Podsumowanie treści

Strona 1

Bulletin 71.4:63EG-98HMDecember 2014D102628X012 www.fisherregulators.comType 63EG-98HM Pilot-Operated Relief Valve or Backpressure RegulatorW6866 Figu

Strona 2 - Bulletin 71.4:63EG-98HM

Bulletin 71.4:63EG-98HM2Main Valve Body Sizes and End Connection Styles(1)(2)See Table 1Maximum Design Pressure(3)600 psig / 41.4 bar or body rating l

Strona 3

Bulletin 71.4:63EG-98HM3CO MPPrinciple of OperationAs long as inlet pressure remains below set pressure, the pilot control spring keeps the pilot valv

Strona 4

Bulletin 71.4:63EG-98HM4MAIN VALVE BODY SIZEEND CONNECTION STYLENPS DN2 50NPT, ASME CL150 RF, CL300 RF, CL600 RF or PN 16/25/40 anged3, 4, 6 80, 100,

Strona 5

Bulletin 71.4:63EG-98HM5Installation Not all codes or regulations will permit these units to be used as nal overpressure protection devices.On the Ty

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Bulletin 71.4:63EG-98HM6REPLACING ENTIRE TRIM PACKAGEW3012-1BODY FLANGESEAT RING SCREWSINTO CAGECAGE SCREWS INTO BODY FLANGEFigure 3. Easy-Maintenance

Strona 7

Bulletin 71.4:63EG-98HM7Ordering Guide Body Size (Select One) NPS 2 / DN 50*** NPS 3 / DN 80*** NPS 4 / DN 100*** NPS 6 / DN 150*** NPS

Strona 8