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About product and suppliers:
            416 square head valve products are offered for sale by suppliers on Alibaba.com, of which valves accounts for 15%, hvac systems & parts accounts for 1%. 

A wide variety of square head valve options are available to you, such as manual. You can also choose from brass, stainless steel, and alloy square head valve

There are 416 suppliers who sells square head valve on Alibaba.com, mainly located in Asia. The top countries of supplier is China, from which the percentage of square head valve supply is 100% respectively.