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Flowserve-Durco-Chemical Process Pumps - ANSI, ISO - Mark 3 ISO

Durco Mark 3 ISO Metallic, Sealed, ISO Chemical Process Pump

BRAND: Durco

The Durco Mark 3 ISO chemical process pump provides unmatched performance and reliability, conforms to ISO 2858 and ISO 5199 design criteria and incorporates advanced design features. The ruggedly designed Durco Mark 3 ISO offers significant operational and maintenance enhancing benefits that help users to minimize the total cost of pump ownership.


  • General Industry
  • Chemicals
  • Water
  • Oil & Gas
  • Power

industry sectors

  • Pulp & Paper
  • Mining
  • Food & Beverage
  • Corn Wet Milling & Ethanol
  • Other Industries
  • Basic (Organic & Inorganic)
  • Specialty (Fine & Consumer)
  • Biofuels
  • Pharmaceutical
  • Water
  • Upstream Exploration & Production
  • Midstream Transportation
  • Downstream Processing
  • Conventional Steam
  • Geothermal
  • Combined Cycle
  • Concentrated Solar Power (CSP)
  • Biomass and MSW
  • ISO 2858
  • ISO 5199
Operating Parameters
  • Flows to 1400 m3/h (6160 gpm)
  • Heads to 220 m (720 ft)
  • Pressures to 25 bar (365 psi)
  • Temperatures from -80°C (-110°F) to 400°C (752°F)
Design Range

Size Range: 20 mm (0.75 in) to 200 mm (8 in)

Features & Benefits
  • Heavy-duty casing with integral foot and multi-ribbed discharge flange provides superior resistance to pipe loads and improves reliability
  • Precision cast reverse vane impeller is the only impeller design that offers repeatable pump performance throughout the life of the pump
  • Open impellers available
  • SealSentry™ seal chamber extends seal life and provides advanced self-flushing capability
  • Standard non-contacting labyrinth seals keep lubricant in and contaminants out
  • Heavy-duty radial and thrust bearings selected for long life and reliability
  • External micrometer impeller adjustment mechanism accurately sets impeller clearance in 20 seconds, in the shop or the field
  • Two-piece, ductile iron bearing housing is designed for safety, strength, interchangeability and retrofit capability
  • Back pull-out design allows removal of rotating element without removing casing, piping or motor
  • 1935/2004/EC food grade compliant option

Center-line Mounted High Pressure

Foot Mounted High Pressure


Recessed Impeller

Close Coupled

Close Coupled Self Primer

Close Coupled Recessed Impeller




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