FAIRCHILD Reversing Relay (M25)
Main Features
- Control Sensitivity of 1/8″ water column.
- Balanced supply valve.
- Aspirator tube design.
- Separate control chamber isolates.
- Unit construction.
Benefits
- Allows for use in high precision applications.
- Minimizes the effects of supply pressure variation.
- Compensates for output pressure droop under flow conditions.
- Isolates the diaphragm from the main flow to eliminate hunting and buzzing.
- Allows servicing without removal from air line.
The 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.
Specifications Max Supply Pressure: 250 psig [17 BAR] Max Output Pressure: 150 psig [10 BAR] Flow Capacity: 40 SCFM (68 m3/HR) Accuracy: 0.10 psi (typ)
