·Dynamic End:  the frame is a welded structure with steel plate subject to post welding internal stress relief.  The type of transmission gear is involute, smooth running, efficient, and durable. Crankshaft is one-piece hollow cast and is splash lubricated

·Fluid End:  suction flange and discharge flange conform to ASA and API specification

·Piston rod and extension rod are connected by clamp to make assembly and disassembly easy and quick

·Bench at the bottom of valve positioning hole prevents valve seat sinking. Piston and cylinder liner are cooled and lubricated by independent spraying pump device for longer service life

·Vulnerable parts are interchangeable 

·Dynamic End:  the frame is a welded structure with steel plate subject to post welding internal stress relief.  The type of transmission gear is involute, smooth running, efficient, and durable. Crankshaft is one-piece hollow cast and is splash lubricated

·Fluid End:  suction flange and discharge flange conform to ASA and API specification

·Piston rod and extension rod are connected by clamp to make assembly and disassembly easy and quick

·Bench at the bottom of valve positioning hole prevents valve seat sinking. Piston and cylinder liner are cooled and lubricated by independent spraying pump device for longer service life

·Vulnerable parts are interchangeable 

·Dynamic End:  the frame is a welded structure with steel plate subject to post welding internal stress relief.  The type of transmission gear is involute, smooth running, efficient, and durable. Crankshaft is one-piece hollow cast and is splash lubricated

·Fluid End:  suction flange and discharge flange conform to ASA and API specification

·Piston rod and extension rod are connected by clamp to make assembly and disassembly easy and quick

·Bench at the bottom of valve positioning hole prevents valve seat sinking. Piston and cylinder liner are cooled and lubricated by independent spraying pump device for longer service life

·Vulnerable parts are interchangeable

·Dynamic End:  the frame is a welded structure with steel plate subject to post welding internal stress relief.  The type of transmission gear is involute, smooth running, efficient, and durable. Crankshaft is one-piece hollow cast and is splash lubricated

·Fluid End:  suction flange and discharge flange conform to ASA and API specification

·Piston rod and extension rod are connected by clamp to make assembly and disassembly easy and quick

·Bench at the bottom of valve positioning hole prevents valve seat sinking. Piston and cylinder liner are cooled and lubricated by independent spraying pump device for longer service life

·Vulnerable parts are interchangeable