289 Series

Fisher 289 Series relief valves are spring-loaded throttling relief valves used as downstream pressure regulators to protect the system from overpressure. A smooth throttling action minimizes pressure surges in the system during relief operation. 289 Series relief valves are ideal for low-pressure settings due to the increased sensitivity provided by a large diaphragm area. 289 Series relief valves are designed for pressure control; they are not ASME safety relief valves.
Type 289 Series Relief Valves
Features

  • Throttling Type Relief
  • High Flow Rates
  • Small Size
  • Reliability Due to Simplicity
  • Compact Design
     

 289 Series  Bulletin
 Schematic (289HH & 1 in 289H)
 Schematic (2 in 289H)
 Schematic (289L)
 Schematic (289A)
 Instruction Manual