Fisher 289 Series Relief Valves
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.
- Throttling Type Relief
- High Flow Rates
- Reliability Due to Simplicity
|Maximum Allowable Relief (Inlet) Pressure||100 psig / 6.9 bar|
|Relief Adjustment Ranges||0.5 to 2.25 psig / 34 to 155 mbar|
|Maximum Inlet Pressure||25 psig / 1.7 bar|