Self-sealing fittings open automatically after they are assembled and they close automatically when they are dismantled from pipeline or equipment. And this design can eliminate the environment pollution possibility by preventing the pipe media from flowing out. This product can reduce operating cost and prevent sand from entering pipe and equipment which can protect pipe and equipment from mechanical wear. What's more, it reduces accident potential. And it is convenient to install and dismantle, which can reduce workers' workload and save working time. The material used meets the standard of ASTM and AISI fully. The product and parts are resistant to corrosion and high pressure and self-sealing fittings makes sealing highly reliable and they have excellent exchangeability. Self-sealing fitting can adjust itself automatically according to connection direction and it makes pipeline arrange in good order and it makes pipeline resistant to fatigue. Self-sealing fittings can be divided into three kinds according to structure: quick self-sealing steel ball fitting, hammer self-sealing union fitting and pin key plug-in self-sealing fitting. They are all used to connect pipes or equipment but they have different connection types.

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