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Fisher™ H284 and H5114 Series Large Internal Relief Valves
H284 and H5114 internal spring relief valves for Bulk Storage tanks can be used in the H500 Combo Joe relief valve manifold or as separate units.
The valves are identical except for valve body materials. When used in ASME tanks, the valves have only the poppet and part of the body outside the tank. The adjusting screw and all other parts are inside the tank, safe from tampering.
Fisher™ H284 and H5114 Series Large Internal Relief Valves


Connection Sizes and Style
2-inch MNPT
Discharge Stack Connection
3-inch MNPT
Construction Materials
Stainless Steel, Brass
Maximum Inlet Pressure (Body Rating)
480 psig / 33,0 bar
Start to Discharge Pressure Range
100 to 400 psig / 6.9 to 27.5 bar
Temperature Capabilities
Nitrile (NBR): -40° to 180°F / -40° to 82°C
Approximate Weights
10 Pounds / 4 kg


  • Stainless Steel Construction
  • Stainless Steel springs
  • Molded Flat Seals
  • Standard Spring Settings
  • Nitrile (NBR) Seat
  • Serial Numbers for Identification


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