Fairchild Pneumatic Computing Relay
- Product Type: Computing Relay
- Manufacturer: Fairchild
- Product Family: Model 22
Pneumatic Computing Relay; Item Pneumatic Computing Relay; Overall Dimension 3 Inch Width x 8.76 Inch Height; Pipe Size 1/4 Inch Female Threaded; Function Reducing, Averaging; Material Die-Cast Aluminum (Valve/Bonnet); Mounting Type Line/Panel; Mounting Hole Size (2) 1/4 Inch-20 TPI x 0.5 Inch, (2) 11/32 Inch; Maximum Over Pressure 100 PSIG (Any Connection), 250 PSIG (Supply Connection); Normal Supply 20 PSIG; Supply Pressure Effect 5 PSIG; Output Flow Capacity 2 SCFM, 20 PSIG; Air Consumption 0.06 SCFM at 15 PSIG; Ambient Temperature -40 to 200 Deg F; Includes Buna-A Diaphragm, Zinc Plated Steel Range Screw and Fastener; Applicable Standard ISO 9001, FMFeatures
Small Bleed Across Relief Seat Assures Fast Response to Small Signals; Multiple Inputs Allow Versatility in Process Control; Adjustable Bias Range from -18 to +15 PSIG Permits Variation in Output; Two Gauge Ports Located 90 Deg from Supply and Outlet Ports, Allows Versatility in Installation; Assures Fast Response to Even Very Small Signals; Allows Versatility in Process Control Applications; Permits Variation in Output to Meet Your Needs; Quick and Easy Installation in the FieldSeries/Model Info
The Model 22 Pneumatic Computing Relay is a highly versatile control valve designed to perform a number of specialized functions, including averaging, differential, inverting, and totalizing. This high quality unit, which offers up to four inputs as well as positive and negative biasing over a broad range, is available in several configurations to meet most application requirements. The combination of multiple configuration options and accurate response characteristics make the Model 22 the ideal choice in a variety of applications with specific input/output requirements such as override or multi-element control, or as an ON-OFF valve. When used as an ON-OFF valve, the Model 22 may open or close a pneumatic circuit, moving rapidly to a full open or a full closed position when signal pressures deviate from set point. In the full open position, the valve passes full supply pressure without modulation or regulation. The function is achieved by connecting output pressure to the signal chamber. This connection forms a feedback loop so that, once flow is started, the valve is driven wide open.