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Air Relays

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Port Size / Body Size

  • 1/4" NPT (1)

Flow Capacity

  • 14 scfm (396 NL/min) (1)

Max Supply Pressure

  • 125 psig (8.35 bar) (1)
  • 150 psig (10 bar) (1)

Body Materials

  • Aluminium (2)
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Max Output Pressure

  • 120 psig (8 bar) (1)

Product Categories

  • Pressure Regulators
  • Back Pressure Regulators
  • Filter Regulators
  • Precision Pressure Regulators
  • Pressure Regulators
  • Stainless Steel Regulators
  • Potable Water Pressure Regulators
  • Gauges and Accessories
  • Pressure Transducers
  • I/P Transducers (current-to-pressure)
  • E/P Transducers (voltage-to-pressure)
  • P/I Transducers (pressure-to-current)
  • I/PAC Integrated Process Air Control
  • Supply Manifold
  • Gauges and Accessories
  • Diaphragm Air Cylinders
  • Rolling Diaphragm Cylinder
  • Small Bore Compact Cylinder
  • Mini Might Cylinders
  • Pneumatic Air Filters
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  • Liquid Level Measurement
  • Vacuum Regulators
  • Valve Positioners
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  • Stainless Steel Volume Boosters
  • View All Products
Home / Air Relays

Air Relays are designed to provide highly accurate and reliable output pressure control to a large variety of applications across multiple markets. Versions offered include pilot operated, multi-stage 1:1, positive and negative bias adjustments, internal and external bias adjustments, reverse acting, high flow and high relief capacity.

Showing all 7 results

  • Mite 70/73 Air Relay

    Mite 70/73 Air Relay

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  • Mite 85 Air Relay

    Mite 85 Air Relay

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  • Super Mite 71L/71H Air Relay

    Super Mite 71L/71H Air Relay

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  • Super Mite 74 Air Relay

    Super Mite 74 Air Relay

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  • Type 200 Precision Air Relay

    Type 200 Precision Air Relay

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  • Type 250 Lock-up Air Relay

    Type 250 Lock-up Air Relay

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  • Type 7150 Precision Air Relay

    Type 7150 Precision Air Relay

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ControlAir’s precision pneumatic relays are multi-stage pressure relays that offer fine adjustment and maximun stability under variable operating conditions. Superior sensitivity senses output pressure deviations to within 1/4 inch of water column pressure. Our Air Relays are positive and negative bias capable, when adjusted for positive bias, output is directly proportional to the input signal plus the bias setting. Output pressure can never go below the value of the bias setting regardless of signal pressure. When set for negative bias, the output pressure will remain at minimum until the signal pressure is some value greater than the negative bias. The high relief capacity of these units provides increased exhaust capacity and their high flow relief valves ensure quick “blow down” for release of downstream pressure.

Applications for precision air relays include:

  • operation of multiple devices from one controlled source over a range of pressure
  • control of pressures in remote locations
  • volume boosting
  • gas mixing

The Mite Series of pneumatic relays offer precise control of air or gas service. Their snap-acting design automatically trips on either an increasing or decreasing signal. Mites are rugged, compact units engineered for high density applications. They are constructed to last and “make decisions” with crisp precision, cycle after cycle.

Mite 70 Snap-acting control relay with manual reset Will either lock-up or vent control pressure to a valve when tripped

Mite 71L/71H High pass or low pass pneumatic selecting relay Automatically selects the higher or lower of two input signals

Mite 73 Snap-acting air signal monitor Accepts up to four inputs and can be reset automatically

Mite 74 Snap-acting control relay with integral 3-way or 2-way valve Combines a Mite 70 with a precision 3-way or 2-way valve

Mite 85 Snap-acting 3-way valve with two trip points Automatically activates back up controller if primary fails

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Industries We Serve
  • Food & Beverage
  • Oil & Gas
  • Control Valve
  • Water Treatment

Products

  • Pressure Regulators
  • Back Pressure Regulators
  • Filter Regulators
  • Precision Pressure Regulators
  • Pressure Regulators
  • Stainless Steel Regulators
  • Potable Water Pressure Regulators
  • Gauges and Accessories
  • Pressure Transducers
  • I/P Transducers (current-to-pressure)
  • E/P Transducers (voltage-to-pressure)
  • P/I Transducers (pressure-to-current)
  • I/PAC Integrated Process Air Control
  • Supply Manifold
  • Gauges and Accessories
  • Diaphragm Air Cylinders
  • Rolling Diaphragm Cylinder
  • Small Bore Compact Cylinder
  • Mini Might Cylinders
  • Pneumatic Air Filters
  • Air Relays
  • Liquid Level Measurement
  • Vacuum Regulators
  • Valve Positioners
  • Volume Boosters
  • Stainless Steel Volume Boosters
  • View All Products
Resources
  • Blog
  • CAD Models
  • Certifications
  • Catalogs
  • FAQ
  • How to Determine the Appropriate Regulator
  • Product Selection Guides
  • Whitepapers
  • Visual Product Reference Guide
  • Videos

ControlAir

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8 Columbia Dr
Amherst, NH 03031 USA

603-886-9400
1 (800) 216-3636
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