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Check valve is designed and produced entirely according to the requirements of API Space 6A Equipment Specifications for Wellhead and Christmas Tree, able to be used interchangeably with corollary equipment at home and abroad that is in line with API Space 6A Standard.
It relies on medium pressure to achieve the metallic seal between valve trim and valve body, and the higher the pressure of medium is, the better the sealing property will be. Pipeline pressure can be bearable always to the inside of valve cavity.
The valve body is made of alloy steel forgings, thus has a strong mechanical property and safe and reliable performance, able to bear quite high pressures.
Check valves
