Full Round Port, Air Compressed Tube, Maximum Economy, Inherently Fail Open Design, Compact/Light Weight Design

  • Clog resistant full round opening
  • Low pressure drop
  • No packing
  • Drop tight closure
  • Simple operation, rubber sleeve is the only moving part

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  • Flanges: ANSI STD B-16, 125 lbs
  • Housing: Cast Iron ASTM A48, Class 35


  • Epoxy paint
  • Sleeve elastomer
  • Bolt-on pact solenoid valve is a 4-way, 5-port solenoid with weatherproof coil and manual override.
  • PRV (with solenoid valve)
  • I/P transducer for modulating service


Ideal for controlling abrasive, viscous and corrosive fluids including wastewater, mine slurries, chemicals, cement, pulp stock, powder and pellets.


The GSF consists of a rubber sleeve inside a full round cast iron bonnet assembly. Injecting compressed air into the bonnet assembly causes the rubber sleeve to collapse, blocking flow through the valve.