99 6 inch flap valve products are offered for sale by suppliers on Alibaba.com, of which check valves accounts for 63%, gate valves accounts for 15%, and other valves accounts for 3%.
A wide variety of 6 inch flap valve options are available to you, such as pressure, hydraulic.You can also choose from normal temperature, medium temperature and high temperature 6 inch flap valve,as well as from water 6 inch flap valve and whether 6 inch flap valve is steel, stainless steel, or iron.