Product Announcements | AUGUST 2020

Durco® Mark 3™ ISO Sealed Chemical Process Pumps - C-Hydraulic Closed Impeller

Re-engineered to provide exceptional hydraulic performance, reliability and low total cost of ownership

Durco Mark 3 ISO sealed chemical process pumps from Flowserve have been redeveloped to provide outstanding hydraulic performance, unrivaled reliability and low total cost of ownership. Target applications for the pump, updated with a C-Hydraulic (closed impeller) design, involve the most aggressive fluids and chemicals as well as high-temperature and high-pressure processes.

Durco® Mark 3™ ISO Sealed Chemical Process Pumps

Global process needs

Provide high environmental and personnel safety during operation and maintenance. Ideal for processes that require a versatile platform for plant-specific seals, accessories and instrumentation systems. Flowserve integrated the Durco Mark 3 ISO power end with the SIHI® CBSD pump wet end to create a premium product that meets customers’ needs for flexibility, hydraulic coverage for a wide range of conditions, and minimized inventory. Their standardized modular system — one power end can be matched with five casing options — accommodates unique user processes.

Demanding applications

High-pressure components, a generous corrosion allowance and wide range of materials of construction ensure reliable performance under demanding conditions, such as:

  • Acid transfer
  • Brine
  • Chemical processing
  • Corrosive services
  • Food and beverage processing
  • Hydrocarbon processing
  • Petrochemical processing
  • Pharmaceuticals
  • Polymers
  • Pulp and paper


Minimized maintenance costs

Maintenance and reliability-enhancing features such as an external micrometer impeller adjustment mechanism, different impeller designs, one power end for various casing executions and a true back pullout design keep your total cost of ownership low.

Engineered flexibility

Select from five mechanically sealed configurations, available in a variety of materials of construction and with single, double or cartridge seals to suit user application requirements. The pumps conform to ISO 2858 and ISO 5199 design criteria.

Find more information on the Durco Mark 3 ISO sealed chemical process pump

Documents & Support

Look to Flowserve for industrial applications solutions

Organic & Inorganic Basic Chemicals

Look to Flowserve for solutions that can improve your bulk processes and sustain operations between catalyst or vessel maintenance.

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Fine & Consumer Specialty Chemicals

For solutions that offer maximum versatility, adaptability and reliability, choose the partner with experience in batch chemical processes.

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Pharmaceutical Chemicals

Precision, expertise and support for a wide range of applications are the hallmarks of our solutions for pharma.

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Every day in petrochemical plants all over the world, Flowserve pumps, valves and seals keep critical processes running safely, efficiently and with the operational flexibility needed to grow with demand.

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Food & Beverage

If you brew it, can it, or bottle it, Flowserve offers solutions to help you do it efficiently, reliably and cleanly.

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General Industries

We don’t just offer you a broad array of industry solutions. We also bring a depth of expertise to every single one.

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