亚洲国产成人精品久久久综合99久久精品国产成人福利一区二区三区中文字幕_国产精品亚洲综合91久久久久久一级乱黄网站_国产一级a毛一级a免费看视频_国产精品高呻吟久久久久AV无码_久久午夜无码人妻鲁丝片午夜精品_а√在线官网在线_国产欧美日本韩国高清视频一区二区三区免费在线

This product is designed and manufactured in full compliance with API Spec 6A "Wellhead and Tree Equipment Specification" requirements, and can meet domestic and international API Spec 6A specifications of the equipment box to use each other.
The valve is a check valve, which relies on the pressure of the medium to achieve the valve core and the valve between the metal-to-metal seal, medium pressure, sealing performance is better.The valve chamber can withstand line pressure at all times.
The valve body is made of alloy steel forgings, with strong mechanical properties, can withstand high pressure, with safe and reliable performance.
The valve cover and the valve body are connected by bolts, the seal is the sealing ring on the valve cover and the inner wall of the valve body is sealed, the sealing performance is reliable.It makes the valve cover and valve body assembly gap is small (designed to 0), thereby reducing the corrosive medium on the bolt and screw hole erosion and reduce the bolt load.
Spool and valve sealing surface surfacing carbide, so that it has good wear resistance and corrosion resistance, spool with sulfur-resistant materials, other parts of the method of limiting hardness, which can be in the H2S-containing environment.