Internal leakage failure of high temperature and high pressure gate valves (leakage of medium between valve disc and valve seat sealing surface) is a common and urgent problem in industrial pipeline systems, and its core cause is often related to sealing surface failure. The following is a systemati...

Excessive operating torque of manual gate valves is usually caused by multiple factors such as abnormal mechanical components, lubrication failure, improper installation, medium influence, and design and maintenance defects. The specific reasons can be analyzed from the following aspects:1、 Mechani...

The sealing effect of manual gate valves depends on the working conditions (pressure, temperature, medium characteristics) and sealing requirements. There is no "absolute best" method, and it needs to be selected based on specific scenarios. The following are mainstream sealing treatment m...

The sealing principle of high-temperature and high-pressure gate valves is based on the design of the sealing pair structure, material performance matching, and load transfer mechanism. By responding to thermal deformation at high temperatures, sealing pressure requirements at high pressures, and me...

A manual gate valve is a device that uses a handwheel (or handle) to drive the valve stem, which in turn drives the gate to move up and down in a direction perpendicular to the fluid channel (axial direction), achieving valve opening, closing, and sealing. Its working principle can be analyzed from...