Higher Pressure Selector Relay (M91)

Higher Pressure Selector Relay (M91)

The Model 91 High Pressure Selector Relay is designed to select the higher of two signal pressures, and to provide a continuous output pressure (or pressure range) to a controller. The ability to precisely control pressure switching and pressure monitoring functions make the Model 91 the logical choice in dead end or low flow applications such as precision control loops.


  • Small, rugged design
  • Soft seat construction
  • Low selection differential
  • Fast response
  • Automatic switching


  • Suitable for installation where space is limited
  • Assures positive shutoff
  • Allow precise control of switching function
  • Well suited for control in critical loops
  • Eliminates manual monitoring of signal pressure

See PUB103-072 for further information.