98H

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					Industrial Regulators
98H Series

98H Series Backpressure/Relief Valves

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W6155

W6157

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D Self-Operated, Pressure-Loaded, and Differential Pressure Construction Available D Sizes through DN 50 or 2 Inches D Temperatures to 232_C or 450_F D Relief (Inlet) Pressures to 27.6 Bar or 400 Psig D Relief Pressure Settings from 0.34 to 25.9 Bar or 5 to 375 Psig D Air, Process Gas, Liquid, and Steam Service

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Body Sizes and End Connections . . . . . . . . . 6-74 Materials . . . . . . . . . . . . . . 6-74 Temperatures . . . . . . . . . . 6-75 Pressures . . . . . . . . . . . . . . 6-75

Industrial Regulators
98H Series
The Types 98H and 98HH are direct-operated, spring-loaded backpressure/relief valves. The 98H Series are used in a variety of gas, liquid, and steam backpressure/relief applications, such as power generation, heating and cooling systems, process systems, and pump recirculation. The Type 98HD uses additional loading pressure to maintain relief differential pressure settings.
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Highly Versatile Compact, Rugged Design

D Differential Pressure Capability D D

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In-Line Maintenance Close, Stable Regulation

D Hastelloy C and Monel Trim Materials Available D Chemically Compatible Elastomers
W0095-1

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Materials Body Sizes and End Connections
BODY SIZE 1/4 inch DN 8, DN 15, DN 20, DN 25, DN 40, DN 50 or 1/2, 3/4, 1, 1-1/2, and 2 inches NPT screwed BODY MATERIAL Cast Iron Steel or Stainless Steel NPT screwed NPT screwed, Classes 150 and 300 raised-face flanged, socket-welding ends, or PN 16/25/40

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Body
Body Cast iron, WCC steel, or CF8M stainless steel Spring Case Cast iron, WCB steel, or CF8M stainless steel

Trim

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Part Name Diaphragm Valve plug guide Valve plug (metal seat) or Disk and disk holder (elastomeric seat) Orifice Pusher post

Trim Material S30200 Stainless steel S41600 stainless steel or S31600 stainless steel S41600 stainless steel or S31600 stainless steel valve plug, or Ethylenepropylene (EPDM) disk with S41600 stainless steel or S31600 stainless steel disk holder S41600 stainless steel, S31600 stainless steel, or Hastelloy C S31600 stainless steel or S41600 stainless steel

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Industrial Regulators
98H Series
Temperatures
Metal Parts
MATERIAL Cast iron WCC/WCB steel CF8M stainless steel TEMPERATURE RANGE _C –40 to 206 –29 to 232 –40 to 232 _F –40 to 406 –20 to 450 –40 to 450

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Trim (or Soft Parts)
MATERIAL Nitrile Neoprene Fluoroelastomer (FKM) Ethylenepropylene (EPDM) Perfluoroelastomer (FFKM) PTFE Diaphragm protector TEMPERATURE RANGE _C –29 to 82 –40 to 82 –18 to 149 Limited to 82_ for hot water –40 to 232 –29 to 232 –40 to 232 _F –20 to 180 –40 to 180 0 to 300 Limited to 180_ for hot water –40 to 450 –20 to 450 –40 to 450

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Pressures
Maximum Inlet Pressures
TYPE NUMBER 98H 98HH, 98HD MAXIMUM INLET PRESSURES AND TEMPERATURES, BAR Steel or Stainless Steel Body, 232_C 20.7 27.6 20.7 17.2 Cast Iron Body, 157_C Cast Iron Body, 208_C TYPE NUMBER 98H 98HH, 98HD MAXIMUM INLET PRESSURES AND TEMPERATURES, PSIG Steel or Stainless Steel Body, 450_F 300 400 300 250 Cast Iron Body, 315_F Cast Iron Body, 406_F

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Relief Set Pressure Ranges
Type Number Body Size Spring Range 1.03 to 2.41 1.72 to 5.17 4.83 to 9.65 8.9 to 13.8 0.345 to 2.41 1.38 to 4.48 3.45 to 6.90 5.52 to 11.7 10.3 to 25.9 Spring Color Yellow Green Red Blue Dark gray Light blue Light gray Black Unpainted Type Number Body Size 1/4, 1/2, 3/4, and 1 inch 1-1/2 and 2 inches 1/4, 1/2, 3/4, and 1 inch Spring Range 15 to 35 25 to 75 70 to 140 130 to 200 5 to 35 20 to 65 50 to 100 80 to 170 150 to 375 Spring Color Yellow Green Red Blue Dark gray Light blue Light gray Black Unpainted All springs may be backed off to 0 bar or 0 psig. Note

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DN 25 98H and 98HD DN 50

98H and 98HD

98HH

DN 25

98HH

Only a brief overview is presented here. For more detailed information, such as capacities and dimensions, refer to the companion catalog, the Fisher Regulator Handbook.

www.fisher.com/regulators www.contekvalves.com www.baumann.com www.fisher.com

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Industrial Regulators
98H Series

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