G&O Pinch valves do not incorporate any stuffing box and are leaktight on all liquids, slurries, granular materials, powders, pastes, gases, acids etc..
Sleeves are supported during opening and closing, and are easily replaceable without any special tools.
The wide range of available elastomer materials enable an appropriate selection for each application and is a guarantee of perfect resistance to corrosion and abrasion.



  • Straight through way
  • ANSI B16.1/125 B16.5/150 and UNI PN 10/16 flange connections
  • Size from 1/2 " through 14"
  • Manual, pneumatic, hydraulic and electric operated.




  • No loss of head
  • Possible flow regulation with handwheel type
  • Perfect resistance to chemical corrosion and abrasion
  • Faultless sealing on liquids, fluid suspensions, granulated materials, powders, sludge, gas etc.
  • No packing
  • Quick and easy replacement of sleeves, no special tooling required
  • Sleeve supported opening and closing
  • No maintenance
  • Long durability
  • Valve bodies in cast iron or aluminium
  • Threaded spindles and side tie rods in stainless steel
  • Cylinders in aluminium and specially treated cylinder springs on pneumatic type
  • Epoxy painted, valve bodies protected with an anti-acid varnish




  • Limit switches
  • Solenoid valve
  • Position indicator
  • Filter regulator
  • 3:15 PSI positioner
  • 4:20mA electropneumatic positoner
  • 4:20mA electronic transmitter of position 30° - 90° angle
  • Monophase and Triphase AC motor
  • Voltage transmitter



  • Sewage and sludge
  • Corrosive chemicals
  • Paper coatings
  • Wet scrubber slurries
  • Abrasive sand slurries
  • Mineral slurries




    GS 1 - handwheel operated, size 1/2 " through 8"
    GS 2 - double handwheel operated, size 10" through 14"
    GS 3 - quick closing, lever operated, size 3/4 " through 3"
    Literature on request only
    GS 4 - quick closing, lever operated, fully sealed driving gear, size 4" and 5"
    Literature on request only




    SINGLE EFFECT ACTING - SPRING TO OPEN
    GS 5 - one cylinder, emergency handwheel, size 3/4" through 8"
    GS 6 - two pre-set cylinders for symetrical operation, fully sealed driving gear, size 10" through 14"
    GS 10 – closing by hydraulic or pneumatic pressure, two pre-set cylinders for symetrical operation, automatic opening by special springs, size 4" through 14"
    Literature on request only

    SINGLE EFFECT ACTING - SPRING TO CLOSE
    GS 7 - one cylinder, emergency handwheel, size 3/4" through 8"
    GS 8 - two cylinders, size 3" through 8"
    GS 11 - opening by hydraulic or pneumatic pressure, two pre-set cylinders for symetrical operation, automatic closing by special springs, size 4" through 8"
    Literature on request only

    DOUBLE EFFECT ACTING
    GS 12 - one cylinder, emergency handwheel, size 3/4" through 8"
    GS 18 - two cylinders, fully sealed driving gear size 4" through 14"

    AUTOMATIC WITH FULLY SEALED HOUSING
    GS 19 - automatic opening by special springs, closing by hydraulic or pneumatic pressure, two cylinders size 2" through 10"
    Literature on request only
    GS 20 - automatic closing by special springs, opening by hydraulic or pneumatic pressure, two cylinders, two emergency handwheels size 2" through 10"
    Literature on request only


    MANUAL
    GS 21 - handwheel operated, size 3/4" through 4"

    SINGLE EFFECT ACTING – SPRING TO OPEN
    GS 25 - one cylinder, emergency handwheel, 3/4" through 3"
    Literature on request only

    SINGLE EFFECT ACTING – SPRING TO CLOSE
    GS 27 - one cylinder, emergency handwheel, 3/4" through 3"
    Literature on request only

    AUTOMATIC
    GS 22 – closing occurs by pressing of a compressed air operated cylinder acting on a pad which in turn squashes to full closure. Limit switches can be applied to indicate valve’s position (open or closed) as opposed to other type of similar valves where direct input of air on sleeve does not allow it. Size 3/4" through 4" NEW