204 4 flapper valve products are offered for sale by suppliers on Alibaba.com, of which check valves accounts for 35%, other valves accounts for 27%, and control valves accounts for 10%.
A wide variety of 4 flapper valve options are available to you, such as manual, pneumatic and air.You can also choose from normal temperature, 4 flapper valve,as well as from gas 4 flapper valve and whether 4 flapper valve is steel, stainless steel, or iron.