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Reversing Relay (M25)

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.
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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.

Related products

  • High Flow Reversing Relay (M2500A)

     The Model 2500A Bias Reversing Relay provides an outlet pressure that decreases in direct proportion to increases in input signal. The input signal that acts on the Diaphragm Assembly opposes the Range Spring force and closes the Supply Valve to decrease output pressure, according to the formula (Po = K - Ps); where Po is output pressure, K is the spring constant, set by the screw, and Ps is signal pressure. The M2500A pneumatic relay delivers this performance at a flow capacity of 150 SCFM (255 m3/HR), to provide fast response and tight control over your application.
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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)

Downloads
M25 Reversing Relay M25 Specs
M25 Reversing Relay M25 IOM Sheets

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