Metal-Seated Ball Valve

Metal-Seated Ball Valve

A valve is a device that controls the flow of fluid, by either preventing or allowing flow through it.For secure sealing of the valve in the close position, substances such as plastic, rubber, Teflon, or nylon may be used as seat materials because of their flexibility. However, when these materials are under high pressure, at a high temperature, or in a corrosive environment, the seat may be distorted out of shape or destroyed, therefore there will not form an e ective seal. A solution to this problem is to replace the plastic seats with metal seats. That is where metal-seated valve comes from. The novel design of the metal-seated ball valve provides low torque, low wear and long life.

A metal-seated ball valve is used to restrict fluid flow to one direction, which consists of a polished sphere, or ball, usually metal, and an annular piece, the seat, ground and polished to form a seal with the surface of the ball. Gravitational force or the force of a spring holds the ball against the seat. While flow in the opposite direction overcomes the force and unseats the ball, flow in the direction of the force is presented. That is how the metal-seated ball valve performances.