The piston is sealed by the rubber O-ring along with the cylindrical surface fitand then tightened by lock nuts,preventing the piston from looseness and actingas the sealing.

Our  full line of API tapers pistons for both triplex and duplex mud pumps. With versatile options of Replaceable Rubber, Urethane or Bonded Urethane Pistons, we are having right pistons for your applications. The monitoring record proved for majority performance keeps customers confident in our ability to deliver quality pistons to their pumps.