Stellite Seat Ball Valve

Stellite Seat Ball Valve, Stellite overlay on valve ball and seat as increase hardness and wearing coating protection for metal seated ball valves.

 

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Stellite overlay on valve ball and seat as increase hardness and wearing coating protection for metal seated ball valves.

Relia Stellite seat ball valve provides freedom thermal expansion of ball without jamming even at high temperature. Our ball valve with stellite faced on ball and seat are bubble tight and zero leakage.

The material most often used for hardfacing valve internals is Stellite 6, a cobalt alloy that contains chromium, tungsten, carbon and other elements (Figure 1). Table 1 gives the chemical composition and some physical properties of Stellite 6 alloy. A hard carbide phase in the CoCr alloy matrix makes this material highly resistant to corrosion and galling.

Hardfacing is a metalworking process where harder material is applied to vulnerable surfaces to mitigate such damage. Whole components could be made from the hard materials, but that generally is a much more expensive solution.

Metallic alloys for hardfacing can be deposited by different processes, including:

Welding
Flame Spraying
Plasma Spraying
High Velocity Oxygen Spraying
Laser

To ensure the quality of a hardfacing application, test for hardness, corrosion, thickness, adhesion, and other characteristics of the overlay, and perform a metallographic examination of the base material, as well.

Valve ball after Stellite 6 hard facing and lapping

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