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Combined Pressure and Vacuum Vent

These devices are known by a variety of names from combination breather valves, conservation and pressure/vacuum vents. They are designed to keep your equipment safe during periods of excessive pressure and vacuum caused by filling and emptying of product, and changes in temperature due to climatic or external fire sources.

All vents come pre-set with full certification including material test certificates, Atex certificate of conformity and function test certificates.


They are available in a variety of designs

Open to atmosphere or Closed (piped away) vent

Standard Pressure settings + 2 mbarg to 100 mbarg for weight loaded

Standard Weight Loaded Vacuum settings -2 mbarg to -60 mbarg

Standard Pressure settings + 100 mbarg to 1000 mbarg for spring loaded

Standard Spring-Loaded Vacuum settings   -70mbarg to -700mbarg

Size range 2" (DN50 mm) – 12" (DN300 mm)

Body materials – Aluminium, Carbon steel, Stainless steel, Polypropylene

Trim material – Stainless steel, Hastelloy, Polypropylene

Diaphragm material – FEP

Removable seats with self-draining design to prevent freezing

Connections to suit your tank typically ANSI/DIN/API

Lightweight design

Nonstandard applications –such as steam jacketed, Derakane coated - please consult us.

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Combined Pressure and Vacuum Vent

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