The sealing principle of American Standard globe valve mainly depends on its unique structure and operation mechanism. The following is a detailed explanation of the sealing principle of American Standard globe valve:

1. sealing structure

American Standard globe valve belongs to a kind of mandatory sealing valve, its sealing structure is usually composed of valve sealing surface and valve seat sealing surface. When the valve is closed, the sealing surface of the valve flap and the valve seat sealing surface close together, forming a reliable sealing barrier to prevent the flow of media.

2. sealing principle

Stem pressure: American Standard globe valve through the valve stem on the valve flap pressure, so that the valve flap sealing surface closely fit on the valve seat sealing surface. This pressure is usually achieved by rotating the handwheel or other operating mechanism to ensure that the sealing surface does not leak when the valve is closed.

Wedge seal: In some American Standard globe valves, a wedge seal structure is used between the valve flap and the valve seat. When the valve flap is lowered, its wedge-shaped part will be mechanically wedged into the valve seat to form a tighter seal. This structure allows the valve to maintain good sealing performance even under high differential pressure.

Self-cleaning function: American Standard globe valve in the working period, its ball and seat will produce dumping phenomenon. This phenomenon makes the fluid will be in the sealing surface of the internal arc flow, the flow of high-speed impact will be attached to the ball surface of the impurities removed, to achieve the purpose of self-cleaning. This helps to keep the sealing surface clean and smooth, prolonging the sealing life.

3. sealing materials

The sealing surface of the American Standard globe valve is usually made of wear-resistant, high temperature-resistant, corrosion-resistant materials, such as surfacing cobalt-based cemented carbide. These materials have excellent mechanical properties and chemical stability, and can maintain the stability and reliability of sealing performance in harsh working conditions.

4.sealing performance assessment

In order to ensure that the sealing performance of the American Standard globe valve meets the relevant standards and requirements, it is usually necessary to carry out strict sealing performance tests. These tests include pressure tests, leakage tests, etc., in order to assess the sealing performance and reliability of the valve in different working conditions.

The sealing principle of American Standard globe valve mainly relies on its unique structure and operation mechanism, which achieves reliable sealing effect through mechanisms such as stem pressure, wedge seal and self-cleaning function. At the same time, the use of high-quality sealing materials and strict testing of sealing performance is also an important measure to ensure the stability and reliability of sealing performance of American Standard globe valve.