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...

The structural design of American standard gate valves (following API, ASME, and other standards) directly determines the contact accuracy, load distribution, and adaptability of the sealing pair, which in turn affects the sealing effect. The following analyzes the impact of core structural design e...

Improving the sealing performance of American standard gate valves (following API, ASME and other standards) requires comprehensive optimization from multiple aspects such as design, materials, manufacturing, installation and maintenance. The following are specific methods:1、 Optimization of sealin...

The material selection of high-temperature and high-pressure gate valves should meet the requirements of high temperature resistance (usually>450 ℃), high pressure resistance (PN100~PN420 or Class 600~Class 2500), creep resistance, oxidation resistance, and medium corrosion resistance, mainly inv...

The sealing effect of gate valves made of different materials mainly depends on the material characteristics of the sealing pair (valve seat and gate sealing surface), including temperature resistance, corrosion resistance, hardness, friction coefficient, and wear resistance. The following is a comp...