GFH45 Airpak® Filter-Low Pressure Regulators

Low Pressure Regulators, vacuum service regulator
Conoflow's GFH45 Airpak® Filter-Low Pressure Regulators are widely used to provide clean, regulated air pressure to instruments and controls, automatic machinery and other pneumatic devices.

Turning the knob changes the force exerted by the range spring on the diaphragm assembly. In equilibrium, the force exerted by the range spring is balanced by the force from the output pressure acting underneath the diaphragm assembly. An unbalance between the output pressure and the range spring force causes a corresponding reaction in the diaphragm and nozzle assemblies. If the output pressure rises above the set pressure, the diaphragm seat is lifted from the plug, venting the excess pressure to atmosphere until equilibrium is reached. If the output pressure drops below the set pressure, the unbalanced force from the range spring acts through the diaphragm assembly unseating the nozzle plug. This allows supply pressure to flow through the nozzle to the downstream port increasing the output pressure. The output pressure increases until it balances the force on the diaphragm assembly by the range spring. At equilibrium, the plug assumes a position which supplies the required flow while maintaining the output pressure at the set pressure.
  • Maximum Supply Pressure: 300 PSI (2068 kPa)
  • Connections: 1/4" NPT
  • Regulated Output Pressure Ranges:
    • 0-25 PSI (0-172 kPa)
    • 0-60 PSI (0-414 kPa)
    • 0-125 PSI (0-862 kPa)
  • Flow Capacity: [100 PSI (690 kPa) Supply] 20 SCFM (0.566 m3/min)
  • Sensitivity: 0.02 PSI (0.14 kPa)
  • Ambient Temperature Range: -20ºF to +150ºF (-29ºC to +66ºC)
  • Approximate Shipping Weight: 3.4 lbs. (1.54 kg-cm)

Materials of Construction:

  • Body: Brass
  • Bonnet: Brass
  • Diaphragm Assembly: Buna “N”
  • Nozzle: Brass w/Buna “N” Seat
  • Range Spring: Steel Plated
  • Bowl and Draincock: Brass/Brass

Dimensional images