The Fairchild 72 controls a pressure signal for pneumatic instrumentation. This regulator is ideally suited for applications with limited space.
When the setpoint is reached, the upward force of the output pressure that acts on the bottom of the diaphragm balances with the downward force that acts on the top of the diaphragm. If the output pressure rises above the setpoint, the force that acts on the bottom of the diaphragm moves the diaphragm assembly upward to close the supply valve and open the relief valve. Excess output pressure exhausts through the vents in the unit until it reaches the setpoint. The vibration damper dampens the throttling action of the valve.
0-5 psig [0-0.35 BAR] up to 2-100 psig [0.15-15.7 BAR]
No measurable consumption (Non-Relieving unit)
up to 300 psi [20 BAR], (2000 kPa) Max supply;
25 psig [1.8 BAR], (1800 kPa) Min supply.
Supply Pressure Effect
Less than 0.025 psig [0.0018 BAR] for 5 psig [0.35 BAR] change in supply pressure
2.5 SCFM (4.25 m3/hr) @ 100 psig [7 BAR] supply and 30 psig [2 BAR] setpoint
0.15 SCFM (0.29 m3/hr) with 5 psig [0.35 BAR] downstream pressure
-40°F to +160°F (-40°C to +71°C)
Materials of Construction
Body: Anodized Aluminum
Trim: Zinc Plated Steel