Fisher Type 289P pilot-operated relief valve is used to provide over pressure protection for downstream systems suitable for service on natural gas, air, propane, or any other operating medium not corrosive to the internal parts. Smooth opening action minimizes system pressure surges during emergency action. Very little buildup over set pressure is required to completely open the main valve for max relief capacity. The external control line provides quick, accurate pressure registration.
Type 289P Relief Valve / Backpressure Regulator

  • Economical
  • High Relief Capacity with Low Buildup
  • Accurate
  • Fast Reseat After Operation
  • Ease of Maintenance
  • Rugged Construction
  • Corrosion Resistant Fasteners
  • Full Usable Capacity

 289P  Bulletin
 Instruction Manual