437 double vent air valve products are offered for sale by suppliers on Alibaba.com, of which other valves accounts for 32%, safety valves accounts for 2%, and check valves accounts for 1%.
A wide variety of double vent air valve options are available to you, such as pressure, manual and hydraulic.You can also choose from normal temperature, medium temperature and high temperature double vent air valve,as well as from water, gas, and oil double vent air valve, and whether double vent air valve is steel, stainless steel, or iron.