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Fisher™ H200 Series Relief Valves
H200 Series pop relief valves are direct-operated relief valves with preset and pinned spring retainers.
When the inlet gas pressure increases above the spring setting, the poppet and disk assembly is pushed away from the orifice. With this simple operation and wide spring setting selection, the H200 Series Pop relief valves may be used where venting to atmosphere is acceptable and where some pressure relieving tolerance is acceptable. A common application is on farm tap installations.
Fisher™ H200 Series Relief Valves


Wide-Open Sizing Coefficient
Cg: 405
Maximum Allowable Relief (Inlet) Pressure
400 psig / 27,6 bar
Fixed Relief Pressures
25 to 300 psig / 1,7 to 20,7 bar with 12 settings
Available Configurations and End Connection Styles
Type H202: NPS 3/4, NPT
Type H203: NPS 1, NPT
Temperature Capabilities
-20° to 160°F / -29° to 71°C
Approximate Weight
0.5 pound / 0,2 kg


  • Space-Saving Construction
  • Economical
  • Durable
  • Protective Cap


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