The Fairchild 66 Stainless Steel Regulator is designed for corrosive environments and extreme temperatures. A large Control Diaphragm area allows for increased sensitivity and the aspirator design compensates downstream pressure droop under flow conditions.

Features

• Large Control Diaphragm area for increased sensitivity.
• Aspirator design compensates downstream pressure droop under flow conditions.
• Viton Elastomers are compatible with corrosive materials and environments.
• A separate Control Chamber isolates the diaphragm from the main flow to eliminate hunting and buzzing.
• Line or Panel Mounting provides flexibility for installation.

Operating Principles

When you adjust the Range Screw to a specific setpoint, the Range Spring exerts a downward force against the top of the Control Diaphragm. This downward force opens the Supply Valve. Output pressure flows through the Outlet Port and the Aspirator Tube to the Control Chamber where it creates an upward force on the bottom of the Control Diaphragm.

When the setpoint is reached, the force of the Range Spring that acts on the top of the Control Diaphragm balances with the force of output pressure that acts on the bottom of the Control Diaphragm and closes the Supply Valve.

When the output pressure increases above the setpoint, the Diaphragm Assembly moves upward to close the Supply Valve and open the Exhaust Valve. Output pressure exhausts through the Vent on the side of the unit until it reaches the setpoint.

Specifications

Supply Pressure
500 psig, [35 BAR], (3500 kPa) Maximum
Flow Capacity
17 SCFM (28.9 m3/HR) @ 100 psig, [7.0 BAR], (700 kPa) supply and 20 psig, [1.5 BAR], (150 kPa) setpoint
Exhaust Capacity
1 SCFM (1.7 m3/HR) where downstream pressure is 5 psig, [.35 BAR], (35 kPa) above 20 psig, [1.5 BAR], (150 kPa) setpoint
Supply Pressure Effect
Less than 0.1 psig, [.007 BAR], (0.7 kPa) for 25 psig, [1.7 BAR], (170 kPa) change in supply pressure
Sensitivity
1” (2.54 cm) Water Column
Ambient Temperature
-20°F to +300°F, (-28°C to 149°C)
Materials of Construction
Body and Housing: Stainless Steel
Diaphragms: Viton (Fluorocarbon) with Teflon on control side
Trim: Stainless Steel and Teflon

Catalogue Pages including ordering details

Installation, Operation and Maintenance Instructions