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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.

Look to Flowserve for industrial applications solutions