Rotork Fairchild Model 66 is a stainless steel pressure regulator for high performance applications with corrosive environments and/or high temperatures. The Model 66 Stainless steel housing and internals, along with its fluorocarbon elastomers are compatible with a wide range of corrosive materials and difficult operating environments.
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.
Features
Model 66 Pneumatic Stainless-Steel Regulator Features
- Five set point pressure ranges from 0-10 psi, 0-0.7 BAR, 0-70 kPa up to 2-150 psi, 0.15-10 BAR, 15-1000 kPa
- Stainless steel and fluorocarbon - compatible with corrosive materials and environments and will not contaminate media
- Control sensitivity to 1" water column - allows use in high precision applications
- Large control diaphragm area - increased sensitivity for higher accuracy
- Valve damper system eliminates hunting and buzzing
- Line or panel mounting provides flexibility for installation
Specifications
Model 66 Pneumatic Stainless-Steel Regulator Specifications
| Specification | Description |
|---|---|
| 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 [0.35 BAR] (35 kPa) above 20 psig [1.5 BAR] (150 kPa) setpoint |
| Supply Pressure Effect | Less than 0.1 psig [0.007 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 |
Q & A
Model 66 Pneumatic Stainless-Steel Regulator Q & A
There are multiple set-point output ranges offered, typically up to 2-150 psi (≈0.15-10 bar).
Downloads
Download Rotork Fairchild Model 66 Pneumatic Stainless-Steel Regulator Datasheet
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