API mud pump piston rubber 1.against heat ,water,oil 2. ... Piston Rubbers: DL premium pistons are fully interchangeable with other API standard designed pistons and deliver maximum performance in almost all ... -P-160,8-P-80,7-P-50,K-700,K-700A,K-500,K-500A,K-380,A1700-PT,A1400-PT,A1100-PT,220P ... ,JWSELLIS WILLIAMS :W-440-LP,WILSON600,PPWH.OMEGA:OPI 1000 API mud pump piston rubber