The PROTEGO® Type PM-HF pilot-controlled diaphragm valve is a highly developed valve for pressure and vacuum relief. Primarily used as a device for outbreathing in tanks, vessels, and process engineering equipment it also offers reliable protection from vacuum and overpressure. It prevents intake of air and unacceptable product vapor loss up to and until the set-to-operate pressure is reached. The valve can be used as an inbreathing device as well. In such an application, the main valve is directly controlled when exposed to a vacuum, i.e. it functions as a weight-loaded diaphragm valve.
- controlled by corrosion-resistant pilot valve
- small amount fl uid stored in the tank released into the atmosphere by the pilot when the valve opens
- max. 10% Technology for minimum pressure increase until full lift
- seals extremely tight; hence, least possible product losses and reduced impact on the environment
- set-to-operate pressure close to the opening pressure; hence, best possible pressure management of the system.
- control diaphragm of the main valve shielded from low temperatures - Long service life
- high flow capacity
- suited for use in hazardous areas
- Field-Test-Connection on request
- Field-Test-Kit on request