Instruction Manual

ManualsBrandsEmerson ManualsRegulators and Relief ValvesEmerson 98 Series Relief Valve or Backpressure Regulator

Type 98HH

D100706X012

Instruction Manual

Form 1930

June 2008

www.emersonprocess.com/regulators

Type 98HH Backpressure and Relief Valves

WARNING

Fisher

relief valves must be installed,

operated, and maintained in accordance

with federal, state, and local codes, rules

and regulations, and Fisher instructions.

If the spring case develops a leak or if

the outlet continually vents gas, service

to the unit may be required. Failure

to correct trouble could result in a

hazardous condition. Only a qualied

person must install or service the unit.

Introduction

Type 98HH (see Figure 1) valve provides relief

or differential relief in liquid, gas, air, and steam service

applications. Outlet pressure settings range from 150 to

375 psig (10,3 to 25,9 bar). Bodies are available in 1/4,

1/2, 3/4, and 1-inch (DN 15, 20, and 25) sizes.

Specications

Specications for the Type 98HH are given on page 2.

Figure 1. Type 98HH Relief Valve

W2592-1

Summary of content (8 pages)

PAGE 1
Type 98HH Instruction Manual Form 1930 June 2008 Type 98HH Backpressure and Relief Valves W2592-1 Figure 1. Type 98HH Relief Valve ! Introduction Warning Fisher® relief valves must be installed, operated, and maintained in accordance with federal, state, and local codes, rules and regulations, and Fisher instructions. Specifications Specifications for the Type 98HH are given on page 2.
PAGE 2
Type 98HH Specifications Available Constructions Self-operated with standard adjusting screw.
PAGE 3
Type 98HH If remote venting is necessary, install a remote vent line in the spring case and outlet connections of Type 98HH relief valve. The vent lines must have the largest practical diameter and be as short as possible with a minimum number of bends or elbows. Overpressure ! Warning Overpressuring any portion of this equipment may cause equipment damage, leaks in the relief valve, or personal injury due to bursting of pressure-containing parts.
PAGE 4
Type 98HH Parts Ordering 4. Lapping procedure: a. Place a small amount of 500-grit silicon carbide or aluminum oxide lapping compound on a flat surface such as a piece of heavy plate glass. When corresponding with your local Sales Office about this equipment, be sure to include the type number and other information stamped on the nameplate. b. Take the valve plug or orifice and move it in a Figure 8 motion on the lapping compound.
PAGE 5
Type 98HH N.S. diaphragm 15 9 17 2 11 23 spring 26 8 loading pressure connection (type 98HHD) 16 12 METAL valve plug 19 METAL 10 6 N.S. orifice 5 4 N.S. 3 N.S. CN9433 A1788-1 1 NEVER SEEZ (1) 30A7036-A Figure 2. Operational Schematic for Type 98HH Relief Valves Figure 3. Type 98HH Relief Valve Assembly with Metal Seals 1. Never-Seez mark owned by Never-Seez Corp.
PAGE 6
Type 98HH Key Description 3* Orifice (continued) Metal to metal seat 316 stainless steel 1/4-inch body 1/2-inch (DN 15) body 3/4 and 1-inch (DN 20 and 25) bodies Elastomer Seat 416 stainless steel 1/4-inch body 1/2-inch (DN 15) body 3/4 and 1-inch (DN 20 and 25) bodies 316 stainless steel 1/4-inch body 1/2-inch (DN 15) body 3/4 and 1-inch (DN 20 and 25) bodies 4* Valve Plug Metal to metal seat 416 stainless steel 1/4-inch body
PAGE 7
Type 98HH Key Description 11 Relief Valve Spring, steel zinc plate 1/4-inch body 1/2-inch (DN 15) body 3/4 and 1-inch (DN 20 and 25) bodies 12* Diaphragm 1/4-inch body Neoprene (CR) Fluorocarbon (FKM) (2 required) 302 stainless steel (2 required) 1/2-inch (DN 15) body Neoprene (CR) Fluorocarbon (FKM) (2 required) 302 stainless steel (2 required) 3/4 and 1-inch (DN 20 and 25) bodies Neoprene (CR) Fluorocarbon (FKM) (2 required) 302 stainless steel
PAGE 8
Type 98HH Industrial Regulators Regulator Division Emerson Process Management Natural Gas Technologies Regulator Division Emerson Process Management TESCOM Regulator Division Emerson Process Management USA - Headquarters McKinney, Texas 75070 USA Tel: 1-800-558-5853 Outside U.S. 1-972-548-3574 USA - Headquarters McKinney, Texas 75070 Tel: 1-800-558-5853 Outside U.S.