API ax VII200 1.25 inch powder metallurgy process stellite 20 valve ball use for valve

API Standard Valve Balls

Additional ball specifications : Ball roundness range to be 0.0001 in .(0.003mm),maximum; ball surface roughness :5RA ,maximum ;ball OD tolerance shall be ±0.001 in .(±0.025mm) for all balls less than 2- inch diameter and ±0.002 in .(± 0.050mm) for all balls 2 inches diameter and over

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Stellite balls are used in wear and high temperature applications, particularly where lubrication is marginal.SYTOP is capable of manufacturing cobalt balls in several alloys.  There are many trade names used for different alloys and often cobalt balls are referred to as Stellite balls, Haynes balls, or Rexalloy balls.  The different alloy compositions are used for applications in valves, ball and seat, regulators, bearings and ball screws in many industries including petroleum and nuclear.

1. High temperature resistance: the strength keeps stable up to 800℃ and it can even

    momentarily used at 1200℃.

2. Wear resistance: due mainly to the unique inherent characteristics of the hard carbide phase dispersed in a CoCr alloy matrix, it has exceptional wear and galling resistance.

3. Corrosion resistance: this exellent and lovely property allows this kind of material parts to be used in oil&gas, slurry, acid liquid and any other mediums.

Founded in 2001, Shenyang Top New Materials Co., Ltd. has concentrated to research, development and production of cobalt-base alloys, tungsten-base alloys, nickel-base alloys and metal ceramics for 15 years.

Our products like cobalt-base alloy saw tips, valve balls, valve seats, bushings, rods, chemical fiber blades, hot-extrusion dies, thermocouple protective tubes have been well recognized by over 30 countries and established long term cooperation.