Vacuum regulating valves

How it works

Vacuum regulating valves protect components against negative pressure. They are closed in the idle state. If the internal pressure of the components decreases by more than the set differential pressure in relation to the atmospheric pressure, the valve opens. The component is ventilated until the set differential pressure has been reached again. Vacuum regulating valves continue to be closed when the internal pressure of a component rises above the ambient atmospheric pressure and thus do not protect against overpressure.


  • Low maintenance
  • Precise stepless adjustment of the differential pressure using a hand wheel
  • Version with locking screw optionally available

Application areas

  • Vacuum pumps
  • Vacuum generators
  • Vessels and pipelines

Technical data

Size: Thread G ¼" to G 2

Air flow rate up to max. 500 Nm³/h, depending on size and differential pressure

Materials (in contact with media)

  • Brass, optionally stainless steel
  • Seals: NBR


It does not include a pressure measurement.

Download area

Here you will find all safety data sheets and important information as download (PDF)

Scroll to Top