97190 3-Way Safety Selector Valve

The S&J Model 97190 3-Way Selector Valve permits the safe and efficient maintenance of redundant pressure relief systems without any process interruptions. This is achieved through the smooth operation of the valve, allowing full flow from the primary system, to be diverted to the secondary system while providing positive shut off for the isolated system. The switching of the systems through a single valve only requires one connection into the pressure vessel, allowing the quick change over and avoiding the costly depressurizing of the system.

The 97190 3-Way Selector Valve, is available in sizes from 2” to 12” with ANSI B16.5 150 lb. and 300 lb. raised face or ANSI B16.5 150 lb. flat face flanged connections. The high flow internal configuration is designed to provide maximum capacity under emergency conditions, while providing positive shutoff for the isolated branch. Operation during “switchover” is performed effortlessly with the low friction design of bearings, seats and seals.

A wide selection of body, rotor and stem materials are available to suit the needs of your specific application. Available materials of construction include 304 Stainless Steel, 316 Stainless Steel, Cast Steel and Aluminum. Consult factory for other material selections. The standard seat seal material is Teflon or Buna-N. Consult the factory for other material selections.

Operators are provided for all sizes. The standard operator for the 2” through 12” valves is the nut drive.

Consult Factory for Remote Limit Switch option.


  • Permits “switchover” function
  • High flow capacity with minimal pressure drop
  • Positive shutoff of isolated branch
  • Low cost option to multiple valve and
    piping configurations
  • Low torque operation during switchover
  • Provided with red position indicator and lockout protection
  • Remote limit switches (optional)

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