GVB/GVB12 Series Snap-Acting Relays

Designed for pneumatic systems, Conoflow Series GVB Snap-Acting Relays change ports to switch or lock in secondary air source when the main supply pressure fails below a predetermined set point. In the event of supply or pilot pressure failure, the positive action relay with one common and two inlet or outlet ports will automatically:
  • Switch from main to auxiliary supply pressure
  • Lock an actuator in its last position
  • Extend or retract an actuator stem
  • Divert flow or pressure from one device to another
The Series GVB Snap-Acting Relays have an integral pilot which eliminates the extra piping and connections required with other lock-up valves. Compact and lightweight, the relays are easily piped and mounted.
  • Set Pressure:  25 to 85 psi (172 to 586 kPa)
  • Maximum Relay Valve Pressure:  150 psi (1034 kPa)
  • Maximum Signal Port Pressure:  100 psi (690 kPa)
  • Relay Valve Port Diameter:  3/16” (4.76 mm) (Cv=0.38)
  • Max Pilot Air Consumption: 3.1 scfh (1.5 lpm) when operating in “A” to “B” circuit mode. 
  • Temperature Range:  0 to 150 °F (-18 to 66 °C)
  • Sensing Port: 1/8” NPT
  • All Others:1/4” NPT
  • Weight:
  • GVB11: 1-3/4 lbs. (0.79 Kg)
  • GVB12: 2-3/4 lbs. (1.25 Kg)

NOTE: 1. Supply (Pilot) pressure must be at least 20% greater than set pressure

PILOT */**

  • Body and Bonnet: Aluminum
  • Inner Valve: Brass
  • Range Spring: Steel
  • Diaphragm: Buna “N”
VALVE */**
  • Body: Brass
  • Spool: 303 Stainless Steel
  • Diaphragm: Buna “N”
  • Bottom Cap: Aluminum

    *Stainless Steel Construction available, consult the factory.
    **Viton and Silicone Elastomers available, consult the factory.

Dimensional images