Precise Flow · Calibration · Test Equipment

M40: Mechanical precision pressure regulator

Many applications require mechanical pressure regulators, which are able to keep a constant supply pressure exactly and long-time stable even with high flow rates. The M40 precision pressure regulator from Fairchild with control ranges from 0 up to 150 mbar or 0 up to 28 bar satisfies highest requirements.


The setting of the control pressure is transmitted by a spring-diaphragm-system to the valve controlling the flow. There is a balance of forces between the spring-diaphragm-system and the opposing output pressure, which keeps the output pressure nearly constant even with major changes. To prevent persistence due to friction, a small quantity of air is continuously blown out by a release valve.

Mechanical pressure regulator M40
Mechanical pressure regulator M40

Product features include:

  • Pneumatic precision pressure regulator for overpressure
  • Pressure control ranges of 0.035 up to 17 bar
  • Flow rates up to 4200 Nl/min at 7 bar input pressure
  • Sensitiveness better than 1.25 mbar
  • Connections for standard pressure gauge

Special features:

  • Low pressure dependency
  • high sensitivity
  • fast response time

M40 – a precise pressure regulator for high flow rates

M40 Mechanical precision pressure regulator

For overpressure with air at high flow rate

More information and technical details can be
found in the data sheet

Data sheet:

Data sheet M40


Manual M40

Additional information
on this subject:


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