The utility model discloses a
high pressure is with double sealed structure
check valve, including valve body, spring, valve,
valve seat, end cover, screw nut and compression nut, the inside of valve body is provided with spring, the inside of valve body is provided with valve, it is connected through
screw thread between valve body and end cover, the
valve seat is inlayed in end cover. The device is composed of
valve seat and valve and forms the
conical surface sealing pair, the valve seat is inlayed in end cover, and the sealing part of valve includes the
conical surface part of valve seat and end cover, the valve seat is PEEK non -
metal material, and it is the effect of main sealing, and end cover is
metal material, and it is the effect of vice -sealing, and provide certain support effect simultaneously, and the valve seat and valve form plane sealing pair, prevent the medium and leak, and the sealing force has end cover thread pre -tightening force to provide, and compression spring acts on valve, and its effect is to provide certain initial sealing force, and its effect two is when medium
reflux, and help valve fast closing and realize sealing.