Universal Breather Valve – Product Description
Universal Breather Valve – Product Description - Image 2
Universal Breather Valve – Product Description - Image 3

Universal Breather Valve – Product Description

The universal breather valve is an automatic ventilation device for storage tanks, oil sumps, and gas vessels. It opens or closes rapidly when internal pressure or vacuum exceeds preset limits, maintaining pressure equilibrium and preventing damage from overpressure or underpressure. With a compact design and easy installation, it is ideal for petrochemical, chemical, power generation, pharmaceutical, food, and hydraulic applications.

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Order now to safeguard your vessels and equipment with reliable pressure relief!

Key Features

  • Precise Pressure Control
    Sensitive spring and diaphragm design deliver high setpoint accuracy (±1%), ensuring consistent operation at the designated opening pressure.

  • Bidirectional Venting
    Provides both pressure release and vacuum relief—automatically venting when internal pressure rises and admitting air when pressure drops.

  • Corrosion & Aging Resistance
    Valve body and internal components are available in 304/316L stainless steel, aluminum alloy, or engineered plastics. Seals are offered in NBR, EPDM, or FKM to suit various media.

  • Compact, Maintenance‑Friendly Design
    Top‑ or side‑opening configurations with lightweight construction. Sealing elements can be replaced quickly without removing the valve from the pipeline, reducing downtime and maintenance cost.

  • Wide Range of Options
    Sizes from ½″ to 4″ (DN15–DN100), with opening pressures adjustable between ±5 mbar to ±500 mbar to meet diverse vessel ventilation needs.

Technical Specifications

Parameter Range / Options
Nominal Size ½″ (DN15), 1″ (DN25), 2″ (DN50), 4″ (DN100)
Opening Pressure 5 mbar – 500 mbar (±1% accuracy, customizable)
Closing Pressure Closes at approx. 20% below opening setpoint
Max. Differential ±1000 mbar
Body Material 304/316L Stainless Steel, Aluminum Alloy, PP, PVDF
Seal Material NBR, EPDM, FKM (select per media)
Operating Temperature –40 °C to +120 °C (up to +200 °C custom)
Connection Type Threaded (NPT/G) or Flanged (ANSI/DIN)
Protection Rating IP65

Typical Applications

  • Petrochemical storage tanks (ethylene, propylene)

  • Engine oil sumps and hydraulic reservoirs

  • Compressed air receivers and pneumatic systems

  • Pharmaceutical and food‑grade vessels

  • Environmental equipment (fume recovery, wastewater treatment)

Installation & Maintenance

  1. Installation

    • Confirm valve size and set pressure meet vessel requirements;

    • Install horizontally or vertically at the top or high‑point of the tank;

    • Tighten threads or flange bolts, ensuring the valve sits level or slightly outward‑tilted.

  2. Maintenance

    • Periodically inspect diaphragm, spring, and seating surface; remove any debris;

    • Replace seals or diaphragm assemblies per the manual if leakage occurs;

    • In corrosive environments, shorten inspection intervals and select more resistant materials.

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