Product information
Combined type vent valve is one important unit in the piping system, 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 combined type vent valve can remove the air existed in the pipe more smoothly, proventing of the pressure fluctuation or other damages in the piping system. It can discharge or suck the air out of or into the pipe quickly. At the same time, this air vent valve can protect it automatically more reliable.
- Discharge air more smoothly
- More automatic
- More reliable discharge
- Safer self-protection
- Long service life
- Design & Manufacturing: CJ / T 217
- Face to face: GB/T 7927
- Flanged ends: GB / T 17241.6, GB / T 9113, ASME B16.1 / B16.5, DIN2532-2534, DIN2542-2544
- Inspection & testing: GB / T 13927, API 598
- Quality assurance: ISO 90001
- Nominal pressure: ANSI 125 / 150LB, PN1.0 / PN1.6MPa
- Size: 1/2 “~ 12” (15 ~ 300mm)
- Materials: cast iron, ductile iron
- 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.Chemical industry
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


