The Lewco W-446 is a triplex mud pump rated at 440 HP input power, with a 6 in stroke and a rated speed of 320 SPM. Factory data lists a maximum working pressure of 2816 PSI, with liner-dependent capability such as 6 in liners at up to 1027 PSI, 5 in liners at up to 1479 PSI, 4-1/2 in liners at up to 1710 PSI and 4 in liners at up to 2169 PSI. The power-end frame is welded from high-strength low-alloy steel rather than cast, using a double-wall welded design with internal stiffeners and gusset plates to form a rigid, stable platform that reduces internal stress from frame deformation and extends bearing and gear life. The crankshaft is forged from top alloy steel such as modified 4340 or 42CrMo and then heat treated; its high chromium and nickel content gives strong resistance to corrosion and crack propagation, and precise calibration keeps vibration and noise low at high speed.
FAQ
What are the factory ratings of the Lewco W-446 mud pump?
Factory data rates it at 440 HP input power, a maximum working pressure of 2816 PSI, a 6 in stroke and a rated speed of 320 SPM.
Which liner sizes are listed for the Lewco W-446 and at what pressures?
Listed examples include 6 in at up to 1027 PSI, 5 in at up to 1479 PSI, 4-1/2 in at up to 1710 PSI and 4 in at up to 2169 PSI. For other sizes, ratings available on request.
Do you stock fluid-end parts for the Lewco W-446?
We currently list no stocked items for this model; please contact us for current availability and lead time on liners, pistons, valves and seats.
What frame design does the Lewco W-446 use?
The frame is welded from high-strength low-alloy steel instead of being cast, with a double-wall welded design plus internal stiffeners and gusset plates, giving a rigid and stable base for the internal components.
Can you ship Lewco W-446 parts to Canada, the US or overseas?
Yes. We serve Canadian, US and international oil and gas customers; these pump parts are exported under HS code 84139100.