Metal Seated Ball Valves

Linuo Metal Seated Ball Valve

The ball in metal seated ball valves has been hardened via plating or heat treatment so that it can sustain the friction imparted by the metal seat. The metal seat is machined to the profile of the ball to give tight shutoff. A metal seat spring, normally made of Inconel, keeps  positive contact between the seat and ball while operating. Precision machining ensures the ball and spring-loaded seats maintain a tight seal for superior shutoff.

Metal seated ball valves can handle much higher temperatures (and still provide tight shutoff) than soft seated valves. Typical working temperatures for metal seated valves are above 600 deg. F. while soft seated valves top out at around 400 deg. F.

A common metal seat material is Stellite, a cobalt-chromium alloy designed for high temperatures and wear resistance.

Metal seated ball valves stand up to high temperatures, pressures and abrasive materials encountered in the oil and gas, chemical, power generation, pulp & paper, food processing, and mining industries.

A variety of special ball and seat materials are available. These include stainless steel, stellite, hard chrome plated steel, tungsten carbide, and chrome carbide. These materials allow the valves to be used in highly abrasive fluids as well as steam.