1997 manual air release valves products are offered for sale by suppliers on Alibaba.com, of which other valves accounts for 39%, safety valves accounts for 10%, and ball valves accounts for 8%.
A wide variety of manual air release valves options are available to you, such as pressure, manual and hydraulic.You can also choose from normal temperature, medium temperature and high temperature manual air release valves,as well as from water, gas, and oil manual air release valves, and whether manual air release valves is steel, stainless steel, or iron.