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WMCA-API-685 Pumps

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Series WMCA API 685 Mag Drive Centerline Centrifugal

Warrender WMCA API-685 alloy centrifugal process pumps (superseding the MCA) are built for critical services and extreme system pressures in full accordance with the API-685 specifications. The WMCA designs are the benchmark for heavy-duty seal-less process pumps. The WMCA API 685 pumps offer the utmost in versatility and reliability in the most hazardous and severe applications. WMCA alloy centrifugal mag-drive designs are available in API 610, API 685 and API 685 multistage configurations. Dynamically balanced, back to back impellers allow for minimal axial load on multistage units.


  • Casing built with heavy wall thicknesses
  • The standard one piece Hastelloy-C276 containment housing exceeds ASME pressure vessel codes; rated for 350 PSI working pressures with capabilities to 1500 PSI
  • External lubrication of our API-685 pump maintains highest pressure differential, enabling dead-head operation.
  • Backed by silicon carbide thrust bearings, impeller pump-out vanes balance axial thrust restart-up of any API-685 pump type within10 minutes
  • Dual back-pull-out design or service either hydraulic end or ball bearing assembly

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Technical Data
  • Flow: 8-4500 GPM (2-1000 m³/H)
  • Head: To 3850 feet (1173 m)
  • Temperature Ratings: -248 to 840°F (-150 to 449°C) without external cooling.
  • Pressure ratings: The MAWP* is 750 PSI (50 Bar) for the standard version and 1500 PSI (100 Bar) for HP Version 7250 PSI (500 Bar) (*) maximum allowable working pressure
  • Use API-685 pumps from Warrender to enjoy long term benefits and higher productivity.
  • AISI 316 or 316L SS, Cast steel WCB (casing and Impeller only), Alloy 20, Monel-400, Hastelloy B or C-276

brochure Warrender API Mag Drive Pumps Brochure
** Also see the Seal-less Mag Drive with Pressure Ratings

data sheetData Sheet

Replacement Parts:

Rear Wet End Kits, Shaft, Sleeve & Thrust Bearings, Impeller & Casing wear Rings, Internal Magnets, Casing Gaskets, Power/ Bearing Frame Components