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Positive and Negative Bias Relay (M14)

Features

  • Control sensitivity of 1/2" water column.
  • Balanced Supply Valve.
  • Aspirator Tube design.
  • Separate Control Chamber.
  • Mounting Bracket available
  • Canadian Registration Number (CRN) certification.

Benefits

  • Allows use in precision applications.
  • Minimizes the effects of supply pressure variation.
  • Minimizes downstream pressure droop under flow conditions.
  • Isolates the diaphragm from the main flow to eliminate hunting and buzzing.
  • Easy to install in the field
  • Certification for use in all Canadian territories and provinces.
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Designed for applications that require an output pressure that is the sum of a controlled input signal plus or minus a fixed bias, Fairchild's Model 14 Biasing Pneumatic Relay provides versatility in its ability to provide either positive or negative biasing in a single unit. The output of the Model 14 relay is the sum of the spring bias, set with the Range Screw, plus a pneumatic input signal. (Po = Ps � K); where Po is output pressure, Ps is signal pressure, and K is the combined spring constant.

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  • Positive Bias Relay (M15)

     The Model 15 Positive Bias Relay is designed for applications that require an output pressure that is the sum of a controlled input signal plus a fixed bias. This pneumatic relay provides an output pressure that represents the input signal pressure plus a preset bias. Mathematically Po = Ps + K where Po is output pressure, Ps is signal pressure and K is the spring constant. This unit, available in several bias range configurations to meet a variety of output requirements, offers excellent sensitivity and high flow capacity in a small volume. The Fairchild Model 15 Pneumatic Biasing Relay is well suited to a variety of control applications, including range shifting, and tension control, and pressure control from a remote location.
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  • High Flow Positive Bias Relay (M1500A)

     The Model 1500 Positive Bias Relay is designed for applications that require an output pressure that is the sum of a controlled input signal plus a fixed bias. This pneumatic relay provides high output flow at an output pressure that represents the input signal pressure plus a preset bias. The output of the relay is the sum of the spring bias, set with the Range Screw, plus a pneumatic input signal. (Po = Ps + K); where Po is output pressure, Ps is signal pressure, and K is the spring constant set by the Range Screw.
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Specifications
Max Supply Pressure:
250 psig [17 BAR]
Max Output Pressure:
100 psig [7 BAR]
Flow Capacity:
40 SCFM (68 m3/HR)
Accuracy:
0.3 psi (typ)

Downloads
M14 Positive and Negative Bias Relay M14 Specs
M14 Positive and Negative Bias Relay M14 IOM Sheets

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