Piston assembly is the expendable parts at the drilling pump hydraulic system,and its one of the biggest wearing parts of drilling work.The piston core is made of 42CrMo. piston rubber is also called the piston cup, its the expendable parts at the drilling pump hydraulic system, and its one of the biggest wearing parts of drilling work.The piston rubber is made of rubber vulcanization.The material of ordinary piston rubber is NBR. Meanwhile, we also provide below spare parts.1Liner: 6 1/2", 7", 140mm, 150mm,160mm, 170mm, 200mm, 230mm 2Piston: 6 1/2", 7", 140, 150, 170, 2303Valve assenbly: valve, seat and rubber4Crosshead5Extension rod6Crosshead Assembly7Gasket 8Oil seal 9O-ring 10Bearing 11Upper guide plate 12Stuffing box13Double-lip seal 14Lock spring 15Seal washer16Piston rod17Lower guide plate18Sleeve: 1 1/2", 2", 2 3/8", 3 5/8" 19Screw 20Valve spring 21Hydraulic cylinder assembly22Hydraulic cylinder flange 23Cylinder cover24Air charge hose assembly25Hydraulic valve puller26Valve cover27Elbow 28Hose assembly 29Baffle plate302S gear oil pump31pressure gauge 0-60Mpa32Filter screen assembly33Double scale pressure gauge 34Backing ring 35Filter screen assembly36Shear relief valve37Screw plug38Muanal hydrualic pump 39Double scale pressure gauge 40Stop valve41Liner lifting tool42Cylinder cover stick 43Transition joint44lengthened rod45SH1/2 chain manual joint46Muanal hydrualic pump47Packing sleeve48Transition taper sleeve49Press sleeve50Long sleeve51Flashboard pulling tool52Short screw rod53Piston nut disassembly frame54Change joint
