Fisher Pressure Relief Regulator 98
98 Series is used for backpressure or relief applications in liquid, gas, air, and steam service. Types 98L, 98H, and 98HH are direct-operated and spring-loaded. Types 98LD and 98HD use additional pressure loading to maintain relief differential pressures, backpressures or for remote setpoint adjustment.
Type 98HM is a direct-operated, spring to close regulator for backpressure or relief applications in liquid, gas, or steam service. The regulator requires no external power to operate and features a sensing line connection for sensing pressure externally from the regulator. A seal washer for the set screw can be included when applications require pressure loading of the spring case (not available on NPS 1-1/2 and 2 bodies (DN 40 and 50)).
(a) Sizes DIN: DN10, DN15, DN20, DN25, DN40, DN50.
Valve body sizes ANSI: NPS 0.25", 0.5", 0.75", 1", 1.5", 2" inch.
(b) Pressure Classes DIN: PN 16, 25, 40 Bar.
ANSI: CL 150, 300 # lbs.
(c) End connections: NPT, Raised-face flanged, ring-type joint, socket-weld.
(d) Spring range:0.14-25.9 barg (2-375 psig).
(e) Max inlet pressure: 27.6 barg (400 psig).
(f) Max temp: 204°C.
(i) Excellent fluid compatibility.
(j) Close, stable regulation.
(k) Compact design.
(l) Differential Pressure Capability.
(m) Sour gas capability.