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Mud Pump Piston assembly The products are conforming API-7K.Core of high quality forged steel piston processed, using a special piston rubber nitrile rubber, heat, oil, water, multi-layer fabric used to strengthen the roots., High tensile strength, chemical resistance, wear resistance long service life, and other manufactured according to API standard piston can be completely interchangeable. Polyurethane curing one piston, one piston is the piston-type polyurethane rubber vulcanized directly on the piston core, without using pressure plate and retainer, for a variety of mud, especially suitable for high-pressure jet drilling and ceramic liner. Can be used interchangeably with the piston assembly. One piston vulcanized rubber, rubber piston rubber-one with a special rubber, heat, oil, water, suitable for high pressure, long-stroke and other conditions of work, particularly suitable for certain wear of the cylinder. Piston assembly parts company offers a full range of piston parts, including piston core, plate, retainer, piston rubber, etc