The OPI 350D is a three-cylinder forged-steel mud pump rated at 350 HP input power with an 8 in stroke. Factory data lists a maximum working pressure of 2816 PSI and a maximum flow of 661 GPM, with liner-dependent output: 6 in liners deliver 661 GPM at up to 1027 PSI, 5 in liners 459 GPM at up to 1479 PSI, and 4 in liners 313 GPM at up to 2169 PSI. Its wear parts are manufactured to API 7K expectations for durability in high-pressure drilling. We supply aftermarket fluid-end wear parts for this model, including Liner （缸套）, Piston （活塞）, Valve （阀）, Valve Seat （阀座）, Valve Spring （阀簧） and Packing （盘根）, shipped to Canada, the United States and international oil & gas markets under HS code 84139100.
FAQ
What are the factory ratings of the OPI 350D?
Factory data rates the OPI 350D at 350 HP input power, an 8 in stroke, a maximum working pressure of 2816 PSI and a maximum flow of 661 GPM.
What flow and pressure does the OPI 350D deliver with different liners?
Per factory data at rated speed: 6 in liners deliver 661 GPM at up to 1027 PSI, 5 in liners 459 GPM at up to 1479 PSI, and 4 in liners 313 GPM at up to 2169 PSI.
Are OPI 350D fluid-end parts available?
Availability changes daily. Please contact us for current availability of Liner （缸套）, Piston （活塞）, Valve （阀） and Valve Seat （阀座） for this model.
Can you ship OPI 350D parts to Canada or the United States?
Yes. We ship mud pump fluid-end parts to Canada, the United States and international destinations under HS code 84139100.
Are your 350D parts interchangeable with original OPI components?
Yes. Our fluid-end parts are manufactured to OEM-equivalent dimensions and material grades so they install directly in the original forged-steel fluid end.