W-446 mud pump are 100% replaceable to EWS-446 mud pump of American brand. HW-440/446 Pump can be widely used in all kinds of works in oil field. When the cylinder liner specification is 6"-3 1/2", piston structure is recommended and it is suitable for Oil-Well Repair and shallow-well drilling, etc. When the cylinder liner specification is 3 1/4"-2", axial piston structure is recommended and it is suitable for high-pressure work. HW446 Mud Pump TECHNICAL SPECIFICATION Rated input power 328KW (440HP) Rated Stroke 320 Stroke/Minute(320SPM) Stroke 152.4mm (6") Gear Ratio 4.578 :1 Max. operation pressure 35Mpa Valve chamber Valve-Over API 4# Max. liner dia. 6" Max. liner mud pressure(160 stroke/minute)16.9Mpa Dia. of suction manifold, 6"(150#) Flange Dia. of discharge manifold 3"(900#) Flange Dia. pinion shaft 95.25 mm(3.75") Key 22.174x15.9mm Dimension:(No included base), 2479X1219X1103 mm Weight 4463 kgIf you need any items, kindly let us know, we will give you a satisfied quotation.