Fisher Pressure Relief Regulator 98

Fisher 98H regulator Askalon AB

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.
(g) Handwheels.
(h) Versatility.
(i) Excellent fluid compatibility.
(j) Close, stable regulation.
(k) Compact design.
(l) Differential Pressure Capability.
(m) Sour gas capability.



Joachim Nyqvist
Joakim Karlsson
Jukka Haikala
Erik Rune
Klaus Bergmann


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