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VN-A-PC Pressure or Vacuum Relief Valve

Brand: PROTEGO
The Protego Type VN-A-PC pilot-controlled diaphragm valve is a newly developed valve for pressure and vacuum relief.

Primarily used as a safety device for outbreathing in tanks, vessels, and process engineering equipment it also offers reliable protection from overpressure and/or vacuum.

It prevents intake of air and unacceptable product vapor loss up to and until the set pressure is reached. In the valve can be used as an inbreathing device.

In such applications, the main valve is directly controlled when exposed to a vacuum, i.e. it functions as a weight-loaded diaphragm valve.
Features
  • Corrosion-resistant pilot valve
  • Small amount fluid stored in the tank released into the atmosphere by the pilot when the valve opens
  • Maximum 10% technology for minimum pressure increase until full lift
  • Extremely tight seal; hence, least possible product losses and reduced impact on the environment
  • Set 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
  • Optimized flow capacity
  • Suitable for use in hazardous areas
  • Field-test-connection on request
  • Field-test-kit on request
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The Protego Type VN-A-PC pilot-controlled diaphragm valve is a newly developed valve for pressure and vacuum relief.

Primarily used as a safety device for outbreathing in tanks, vessels, and process engineering equipment it also offers reliable protection from overpressure and/or vacuum.

It prevents intake of air and unacceptable product vapor loss up to and until the set pressure is reached. In the valve can be used as an inbreathing device.

In such applications, the main valve is directly controlled when exposed to a vacuum, i.e. it functions as a weight-loaded diaphragm valve.
Features
  • Corrosion-resistant pilot valve
  • Small amount fluid stored in the tank released into the atmosphere by the pilot when the valve opens
  • Maximum 10% technology for minimum pressure increase until full lift
  • Extremely tight seal; hence, least possible product losses and reduced impact on the environment
  • Set 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
  • Optimized flow capacity
  • Suitable for use in hazardous areas
  • Field-test-connection on request
  • Field-test-kit on request

Specifications

Brand

Approvals & Certifications

  • ISO 6358, ISO 16016
  • TÜV (Technischer Uberwachungsverein)

Diaphragm Material

  • Housing: Stainless Steel
  • Pilot: FEP

Enclosure, Body Material

  • Pilot: Aluminum
  • Pilot: Stainless Steel

Flange Size - 12” (DN 300)

  • 12” (DN 300) - 150# ASME B16.5

Flange Size - 16” (DN 400)

  • 16” (DN 400) - 150# ASME B16.5

Flange Type

  • Raised Face (RF)
  • Smooth Finish

Materials of Construction

  • Pilot Lines: Stainless Steel

Pressure Range

  • psi: -0.101 to -0.031 (kPa: -0.7 to -0.22, Mbar: -7 to -2.2) - Vacuum
  • psi: 0.290 to 15 (kPa: 2 to 103.4, Mbar: 20 to 1034)

Seat / Seal Material

  • Seal: PTFE
  • Valve Seat: Stainless Steel