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Model 25 Reversing Relay
Model 25 Reversing Relay
Brand: Fairchild Industrial Products
The Rotork Fairchild Model 25 Reversing Relay is designed for applications requiring an output that equals a manually preset spring load minus a variable signal pressure.
This high quality unit combines excellent sensitivity with unusually high flow capacity.
The Model 25 is ideally suited for a variety of precision control applications, including converting direct acting valves to reverse action, controlling opposite acting valves from a single transmitter, and cushioning cylinder loads.
The basic mathematical expression for the Model 25 is PO = K - PS where PO is output pressure, PS is signal pressure and K is the spring constant.
FeaturesSpecifications
Actuator Type
- Knob Adjust
BSP Connection
- BSPP Female (Parallel)
- BSPT Female (Tapered)
Supply Pressure Effect
- psig: 0.1 (bar: 0.007, kPa: 0.7) for a psig: 100 (bar: 7, kPa: 700) Change in Supply Pressure
Exhaust Capacity - Relieving Units Only
- 11 scfm (18.7 m³/hour)
Relief
- Relieving
NPT Connection
Sensitivity
Enclosure, Body Material
Elastomers
Supply Pressure - Maximum
Ambient Temperature Range
Mounting
Pressure Range
Vent
Flow Capacity
Signal or Output Pressure - Maximum
Documentation
Data Sheets
- Data Sheet - Fairchild pdf 652 KB
Installation Instructions
- Fairchild Model 3400 Pneumatic Regulator Product Manual pdf 471 KB
- IOM Instructions - Fairchild 25 Reversing Relay pdf 462 KB
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