Mud pump piston assy

connected with piston rod,  reciprocating working  in mud pump liner

Specifics: external diameter 4-1/2"----7-1/2"    inner hole: diameter 1-1/2"  &  1-5/8"

  Piston cup material:

   1, made by NBR (Nitril rubber); 

      bearing tempreture: under 120 centigrade

      working life: 200 hours

     Oil resistance, acid-alkali resistance 

      quality guarantee period: 4 years /Max (store in clean & dry place)

   2, made by Polyurethane;

      tempreture bearing: under 60 centigrade

      working life: 300 --500 hours

      Max pressure: 35 Mpa

      Oil resistance, acid-alkali resistance