7321 1/2 relief valve products are offered for sale by suppliers on Alibaba.com, of which safety valves accounts for 17%, other valves accounts for 14%, and control valves accounts for 6%.
A wide variety of 1/2 relief valve options are available to you, such as pressure, manual and hydraulic.You can also choose from normal temperature, medium temperature and high temperature 1/2 relief valve,as well as from water, gas, and oil 1/2 relief valve, and whether 1/2 relief valve is steel, stainless steel, or iron.