Chemical Pump - Durco Mark 3 ISO

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The Durco Mark 3 ISO pump is renowned for its cutting-edge design, performance, efficiency, and dependability while handling the most demanding applications. It also complies with ISO 2858, ISO 15783, and ISO 5199 design standards. The Durco Mark 3 ISO’s tough construction provides users with considerable operational and maintenance-enhancing advantages that lower the total cost of ownership for pumps.



Durco Mark 3 ISO

FLOW UP TO 23,333 LPM (Liters per minute)
or 1400 m3/hr

Features & Benefits

  • SealSentry seal chambers with flow modifiers significantly extend seal life
  • External micrometre impeller adjustment mechanism simplifies maintenance
  • High performance and reliability achieved by using energy-efficient hydraulics
  • Modular design and high interchangeability provide maximum flexibility
  • Back pullout design for faster servicing without removing the piping, casing, or motor
  • Precision cast reverse vane impeller preserves initial pump performance

Available Options

Durco Mark 3 is available in various configurations and comes with a range of options to suit your specific needs. Get in touch with our experts for more information.

  • ATEX, Food-grade, Drinking water, CUTR configurations available
  • Sealless mag drive configuration available
  • Wide range of construction materials
  • Impeller options: reverse vane, open impeller, closed impeller
  • Impeller material options
  • Centerline-mounted casing available
  • Drain, gauge, recirculation connections are available
  • Size Range: 20 mm to 200 mm
  • Spare parts

Key Specifications

  • Flows to 1,400 m³/h (6,160 US gpm)
  • Heads to 220 m (720 ft)
  • Pressures to 25 bar (365 psi)


Long Coupled

  • Flows to 1400 m3/h
  • Heads to 220 m
  • Pressures to 25 bar

Close Coupled

  • Flows to 570 m3/h
  • Heads to 100 m
  • Pressures to 25 bar


  • Flows to 100 m3/h
  • Heads to 100 m
  • Pressures to 25 bar

Recessed Impeller

  • Flows to 750 m3/h
  • Heads to 100 m
  • Pressures to 25 bar

Vertical Sump

  • Flows to 1400 m3/h
  • Heads to 250 m
  • Pressures to 25 bar


  • Acid transfer
  • Brine
  • Chemical processing
  • Corrosive services
  • Food and beverage processing
  • Hydrocarbon processing
  • Petrochemical processing
  • Pharmaceuticals
  • Polymers
  • Pulp and paper
  • Seawaterer
  • Slurries
  • Solvents
  • Steel and primary metals
  • Water and wastewater treatment


High-pressure components, a generous corrosion allowance and a wide range of materials of construction are just some of the features and options that ensure Durco Mark 3 ISO pumps perform reliably under demanding conditions.


Durco Mark 3 ISO mechanically sealed pumps are the standard bearer for ISO chemical process pumps. They are recognized worldwide for their ability to tackle the most demanding applications with exceptional performance, efficiency and reliability.


Durco Mark 3 ISO MAG sealless magnetic drive pumps provide dependable, leak-free performance in all types of applications. They are particularly well-suited for applications involving toxic, explosive and valuable liquids.
Davey boasts highly dependable pumps for the commercial, residential, and infrastructural sectors.Davey boasts highly dependable pumps for the commercial, residential, and infrastructural sectors.


Industrial Chemical Pumps

In Durco Mark 3 ISO centrifugal pumps, fluid enters the impeller through the “eye” and is “centrifuged” (hence the name) to the impeller periphery. As the impeller rotates, it imparts kinetic energy onto the fluid. The impeller vanes have channels with an increasing flow path area. As the flow path area expands, the passing fluid’s velocity decreases and the pressure increases. The fluid then falls to the volute. Due to the unique shape of the volute casing, the fluid undergoes a further velocity decrease and pressure increase. This causes the liquid to be discharged through the discharge port.

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