Piston Hub the material used is ASTM5140 or ASTM4140, the premium forged steel. Piston has single action, double action, single action vulcanization and double action vulcanization piston ,which has A,K, B & L type. Outer round is determined based on the liner bore, it has 4”、4.5”、5”、5.5”、6”、6.25”、6.5”、6.75”、7”、7.25”、7.5”、7.75”、8” and piston has 1”、1-1/2”、1-5/8”. Double action piston has API-1#、API-3#、API-4#、API-5#、API-6#.
b) Piston Rubber
Piston Rubbermaterials used is or Polyurethane. They are divided intoA, K, B and K type and the size will be determined based on the piston to be used.
c) Plate & Snap Ring
Plate & Snap Ringmaterial used is 20# steel plate, and it is completed throughfine machining & pressing.. Its size will be determined based on the piston to be used. Material of snap is adopted and used ASTM1066 and it is divided into A、K、B、L type.