Liquid error (layout/theme line 47): Could not find asset snippets/sc-includes.liquid
Menu
Cart 0
Fisher 289L Low Pressure Relief Valve 1" x 1" FNPT

Fisher 289L Low Pressure Relief Valve 1" x 1" FNPT

Now 5% off!, Use discount code at checkout: ReliefValveSale

 

 

BULK ORDERS MAY REUQIRE ADDITIONAL TIME FOR SHIPMENT. CONTACT US VIA PHONE OR EMAIL TO REQUEST MORE INFORMATION ON AVAILABILITY AND OTHER PRODUCT OPTIONS. 

 

The 289 Series relief valve is a throttling relief valve used downstream of pressure regulators to protect the downstream system from overpressure. A smooth throttling action minimizes pressure surges in the system during emergency operation. These relief valves are available in 1/4, 3/4, 1 or 2 NPT sizes with spring ranges (relief pressure settings) from 5 in. w.c. to 75 psig / 12 mbar to 5.2 bar.

All sizes above 1/4 NPT feature a pitot tube booster for achieving the highest possible relief capacity with a minimum buildup of system pressure. When the valve is opening, high gas velocity through the orifice creates an area of relatively low pressure near the end of the pitot tube. This pitot tube effect forms a partial vacuum above the diaphragm which helps to open the valve.


Available Models:

  • Type 289L-22: 1” x 1” FNPT  spring-loaded relief valve for relief pressure settings of 10" to 18” WC 
  • Type 289L-21: 1” x 1” FNPT  spring-loaded relief valve for relief pressure settings of 12" to 40” WC 

Resources:

 

We Also Recommend

Fisher CS400IR Pressure Reducing Regulator with Internal Relief

Fisher CS400IR Pressure Reducing Regulator with Internal Relief
Fisher CS800IR Pressure Reducing Regulator with Internal Relief

Fisher CS800IR Pressure Reducing Regulator with Internal Relief
Fisher CS200/CS400 Main Spring

Fisher CS200/CS400 Main Spring
Fisher 289H Pressure Relief Valve 2" x 2" FNPT

Fisher 289H Pressure Relief Valve 2" x 2" FNPT
Fisher 289H High Pressure Relief Valve 1" x 1" FNPT

Fisher 289H High Pressure Relief Valve 1" x 1" FNPT