FAIRCHILD Reversing Relay (M25)

Reversing Relay (M25)

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)