Control Valves

Double Orifice Air Release Valve

PN10-PN16 
2 “~ 8” (50~200mm)
Cast Iron, Ductile Iron

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Double Orifice Air Release Valve Descriptions

Double orifice air release valve is one normal type of exhaust valve in the long big piping transport, which is normally mounted on the top of the pipe or pipe air holding place to discharge the air in the pipe, When the power supply for the pump is off, pump is stopped working, there will be negative pressure inside of pipeline, there will be vibration or break happened. Then, the air valve will work to suck into air quickly, keep the pressure inside the pipeline to be safe, making sure the pipe work normally. Flowspec combined air vent valve can remove the air existed in the pipe more flexible, proventing of the pressure fluctuation or other damages in the piping system. Double orifice air release valve is applicable especially to the main water pipes and deep well pumps piping system. 

1. FEATURES
  • Discharge air more flexible
  • Preventing of the water hammer
  • Discharge the air slowly
  • Safer self-protection 
  • Long service life
3. STANDARDS
  • Design & manufacturing: BS EN1074-4:2000
  • Face to face: BS EN1074-4
  • Flanged ends: EN 1092-2:1997, ASME B16.1/B16.42, AS4087
  • Inspection & testing: EN 12266-1:2012
  • Quality assurance: ISO 90001
  • Special: WRAS approved
  • Applicable medium: water, sewage, sea water
  • Applicable temperature: 0 ℃ ~ + 80 ℃ (higher temperature is available upon request)
2. TECHNICAL SPECIFICATIONS
  • Nominal pressure: PN1.0 / PN1.6MPa
  • Size: 2”~ 8” (DN50 ~ 200mm)
  • Materials: cast iron A126 B (GG25), ductile iron A536 65-45-12 (GGG40)
4. APPLICATIONS
  • Water projects
  • High buildings
  • Water treatment industry
  • Power plant
  • Pump station

Why Choose Flowspec Luokai

45+ Years Experience

Founded in 1978, manufacturing industrial valves for over four decades with proven reliability worldwide.

Global Certifications

ISO 9001, CE/PED, WRAS, FM, UL, API approved — compliant with international quality and safety standards.

OEM Custom Solutions

Flexible design and manufacturing per your specifications — material, size, pressure, actuation tailored to project needs.

Worldwide Delivery

Exported to 5 continents — North & South America, Europe, Middle East, Southeast Asia, and Africa.

Our Service Promise

Strict Quality Control

Every valve tested to API 598, EN 12266 before shipment

Timely Global Delivery

Reliable logistics to 5 continents with secure packaging

OEM & Custom Design

Tailored material, size, pressure and actuation to your specs

Dedicated After-Sales

Technical support and service throughout product lifecycle

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