乱人伦人妻精品一区二区_CaoPorn超碰最新地址进入_国产97碰免费视频_亚洲色偷偷色噜噜狠狠99

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.