79 screw down check valve products are offered for sale by suppliers on Alibaba.com, of which other valves accounts for 36%, check valves accounts for 20%, and gate valves accounts for 12%.
A wide variety of screw down check valve options are available to you, such as manual, air.You can also choose from normal temperature, high temperature screw down check valve,as well as from water, oil, and steam screw down check valve, and whether screw down check valve is steel, stainless steel, or iron.