The Lewco WH-440 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, reached with the 3-1/2 in liner; other listed combinations include 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. Unlike a traditional cast-iron frame, the power-end frame is welded from high-strength low-alloy steel and heat treated after welding. The crankshaft is a one-piece forging precision machined from top alloy steel such as modified 4340, avoiding the stress concentration found in multi-segment bolted designs.
FAQ
What are the factory ratings of the Lewco WH-440 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 WH-440 and at what pressures?
Listed examples include 6 in at up to 1027 PSI, 5 in at up to 1479 PSI, 4 in at up to 2169 PSI and 3-1/2 in at up to 2816 PSI. For other sizes, ratings available on request.
Do you stock fluid-end parts for the Lewco WH-440?
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 crankshaft design does the Lewco WH-440 use?
It uses a one-piece forged and precision-machined crankshaft made from top alloy steel such as modified 4340, rather than a multi-segment bolted design that is prone to stress concentration.
Can you ship Lewco WH-440 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.