The H41H lift check valve is a type of check valve where the valve disc slides along the vertical centerline of the valve body, and can only be installed on horizontal pipelines. The high-pressure small-diameter check valve disc can adopt a spherical shape. The valve body shape of the H41H check valve is the same as that of a globe valve (which can be used interchangeably with globe valves), so its fluid resistance coefficient is relatively high, but its sealing performance is better than that of a rotary valve.

　　The working principle of H41H lift check valve:

When the medium flows into the valve body as indicated by the arrow on the valve body, the pressure of the medium acts on the valve disc to generate an upward thrust. When the thrust of the medium is greater than the gravity of the valve disc, the valve opens. When the force of the medium pressure behind the valve acting on the valve disc plus the gravity of the valve disc itself is greater than the force of the pressure before the valve acting on the valve disc, the valve closes and prevents the medium from flowing back.

　　Scope of application of H41H lift check valve:

Lift check valves are selected for pipelines in various working conditions such as petroleum, chemical, and thermal power plants with nominal pressure PN1.6~6.4MPa and working temperature -29~550 ℃. Applicable media include water, oil, steam, etc.

　　The structural characteristics of H41H lift check valve:

1. The selection of materials is meticulous, in compliance with relevant standards, and the overall quality of the materials is high.

2. The sealing pair is advanced and reasonable, and the sealing surface of the valve disc and seat is made of iron-based alloy or Stellite cobalt based hard alloy overlay, which has good wear resistance, high temperature resistance, corrosion resistance, abrasion resistance, and long service life.

3. The product is designed and manufactured according to the national standard GB/T12235.

4. Various piping flange standards and flange sealing types can be adopted to meet various engineering needs and user requirements.

5. The valve body material variety is complete, and the gasket can be reasonably selected according to actual working conditions or user requirements, which can be suitable for various pressure, temperature, and medium working conditions.

　　Structural diagram of H41H lift check valve: