Small Single Orifice Air Valve with Isolation Valve
PN10-PN16
1/2 “~ 1-1/4”
Iron, Ductile Iron
Product information
Small single orifice air valve with isolation valve is one important 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, making sure the pipe work normally. Flowspec slow closing type combined vent valve can remove the air existed in the pipe more flexible, proventing of the pressure fluctuation or other damages in the piping system. It is applicable especially to the main water pipes and deep well pumps piping system.
- Discharge air more flexible
- Preventing of the water hammer
- Discharge the air slowly
- Safer self-protection
- Long service life
- Design & Manufacturing: BS EN1074-4:2000, BS5163:2004
- Face to face: BS EN1074-4
- Flanged ends: EN 1092-2:1997
- Inspection & testing: EN 12266-1:2012
- Quality assurance: ISO 90001
- Special: WRAS approved
- Nominal pressure: PN1.0 / PN1.6MPa
- Size: 1/2”~ 1-1/4” (15 ~ 32mm)
- Materials: cast iron, ductile iron
- With DN40-DN65, DN80 flange
- Applicable medium: water, sewage, sea water
- Applicable temperature: 0 ℃ ~ + 80 ℃ (higher temperature is available upon request)
- Typical application:
1.Water projects
2.High buildings
3.Water treatment industry
4.Power plant
5.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


