FISHER 289RC relief Valves or Backpressure Regulators

289RC: Not specified, but part of the 289 series.

Sizes and Connections

Valve body size: 1/4 NPT for 289A and 289U models; 1 NPT and 2 NPT for 289H models; 1 NPT for 289HH models; 3/4 NPT and 1 NPT for 289L models.

Connection: NPT thread connection is usually adopted, which is easy to install, has better sealing and can adapt to various installation environments.

Pressure Parameters

Maximum Allowable Pressure Relief (Inlet) Pressure: 100 psig/6.9 bar.

Pressure Relief Set Pressure Range: Varies by model, with a general range of 5 wc to 50 psig/25 mbar to 3.5 bar.

289H Relief pressure adjustment range: 0.5 to 2.25 psig/34 to 155 mbar.

Temperature Range

Nitrile rubber (NBR) and chloroprene rubber (CR): for temperatures from - 20 to 150°F/-29 to 66°C.

Fluoroelastomer (FKM): available in Models 289H and 289HH only, for temperatures from 20 to 300°F/-7 to 149°C.

Weight

Models 289A and 289U: approximately 0.75 lb/0.3 kg.

Model 289H: 4 lb/2 kg for 1 NPT, 15 lb/7 kg for 2 NPT.

Model 289HH: 4 lbs/2 kg.

Model 289L: 15 lbs/7 kg.

Other Features

Throttled Pressure Relief: Smooth throttling operation minimizes pressure shock in the system during pressure relief.

High flow rates: meets the need for larger pressure relief flows to protect the system, e.g., discharge flow rates up to 3200 Nm³/h.

Compact design: simple structure, small size, easy to install and maintain, can save space.