Industry Press Releases

Flowserve Expands its Range of Durco® Mark 3(TM) ISO Higher-Pressure Pumps

Saturday, Jun 13, 2015

Flowserve Corporation, a leading provider of flow control products and services for the global infrastructure markets, announced today at the ACHEMA 2015 World Forum of the Process Industry in Frankfurt, Germany, that it has expanded its line of Durco Mark 3 ISO chemical process pumps with a range of higher-pressure variants.

The release of the higher-pressure pumps comes at a time of increasing demand from major chemical companies and refineries for ISO 2858 and ISO 5199 pumps rated up to 25 bar.

"The introduction of higher-pressure variants to the Durco Mark 3 ISO pump line is in response to an industry move to higher operating temperatures in some chemical processes and an increased focus on process safety," said Bob Hendricks, President, Industrial Pump Operations. "The Flowserve design team has expanded the coverage of its well-established Durco Mark 3 ISO range while retaining the benefits of reliability, ease of maintenance and low total cost of ownership - the hallmarks of this pump line."
The sealed Durco Mark 3 ISO pumps are designed to operate up to a pressure rating of 16 bar. The new high-pressure casings match the hydraulic performance, dimensions and branch location of the standard casing. However, by the use of 3-D modeling and finite element analysis, the pressure rating of the pump is increased up to 25 bar, dependent on material and temperature, with minimal increase in weight. In addition to the casing, all other pressure-containing parts are also rated up to 25 bar. The pumps are available in a wide range of materials, including carbon steel, stainless steel, and reactive alloys such as titanium and zirconium.

Available in more than 30 models as foot- and centerline-mounted casings, these high-pressure pumps are fully compliant with ISO 2858 duty conditions and dimensional requirements. The high-pressure casings and associated components have been designed for use with the sealed Durco Mark 3 ISO power end components to ensure a high degree of interchangeability, thereby minimizing spare parts inventory.

Durco Mark 3 ISO pumps have capacities up to 1,400 m3/hour (6,160 U.S. gpm) and heads to220 m (720 ft.). Discharge nozzle sizes range from 32 mm (1.25 in.) to 200 mm (8 in.) and operating temperatures from -80 °C (-110 °F) to 400 °C (752 °F). The efficiencies and NPSHR of the higher-pressure variants are the same as the sealed Durco Mark 3 ISO with ISO 2858 compliant hydraulics.

The Durco Mark 3 ISO higher-pressure pump range is CE marked, compliant with all applicable European Directives such as the Machinery Directive and ATEX, and also has GOST certification.

Flowserve will highlight the Mark 3 ISO pump at ACHEMA stand B63. For more information, please visit

Flowserve Contacts

Investor Contacts:
Jay Roueche, Vice President, Investor Relations & Treasurer, (972) 443-6560
Mike Mullin, Director, Investor Relations, (972) 443-6636

Media Contacts:
Lars Rosene, Vice President, Global Communications and Public Affairs, (972) 443-6644
Amy Allen, Manager, Global Communications and Public Affairs, (972) 443-6501

About Flowserve: Flowserve Corp. is one of the world's leading providers of fluid motion and control products and services. Operating in more than 55 countries, the company produces engineered and industrial pumps, seals and valves as well as a range of related flow management services. More information about Flowserve can be obtained by visiting the company's Web site at