Flowserve Expands Capabilities of Its Range of ISO Standard Chemical Process Pumps

The Durco Mark 3 ISO pump range is designed to offer end users the benefits of a price-competitive, high-efficiency, high-reliability pump incorporating many advanced design features.

DALLAS, June 18, 2012 — Flowserve Corporation (NYSE: FLS), a leading provider of flow control products and services for the global infrastructure markets, today announced the launch of its expanded range of Durco® Mark 3™ ISO chemical process pumps at the ACHEMA 2012 World Exhibition and Congress on the Process Industry in Frankfurt, Germany.

The Durco Mark 3 ISO pump range is fully compliant with ISO 2858 (dimensional) and ISO 5199 (design) criteria and is designed to offer end users the benefits of a price-competitive, high-efficiency, high-reliability pump incorporating many advanced design features. In developing the pump, the Flowserve design team combined state of the art hydraulic and modeling software with knowledge gained from more than 30 years of experience with its ANSI/ASME B73.1 stablemate, the Durco Mark 3 ANSI pump.

With flows to 1400 m3/h (cubic meters per hour)/6160 US gpm (US gallons per minute), heads to 220 m (meters)/720 ft (feet) and operating temperatures from -80 C to 400 C (-112 F to 752 F), the Durco Mark 3 ISO pump is available in 45 sizes, plus many designs, configurations and material combinations. The new pump offers increased reliability through its heavy-duty casing, large radial and thrust bearings and SealSentryTM seal chamber. A range of impeller options is available. The Durco signature “reverse vane” impeller can offer significant benefits, including ease of maintenance and repeatable pump performance throughout the life of the pump. Cost-effective maintenance can be achieved via its back pullout design, two-piece bearing housing, micrometer-style impeller adjustment mechanism and high degree of parts interchangeability.

Each Durco Mark 3 ISO pump is supplied with the new IPS Beacon™ condition monitoring unit. Mounted on the bearing housing, this battery-powered device provides a clear visual indication if temperature or vibration levels exceed pre-set limits.

Chuck Powers, director, product management, commented, “The Durco Mark 3 ISO pump offers significant features and benefits to our customers. These improvements underline our commitment to provide our customers with industry-leading products, distinguished by high-quality, superior performance and outstanding reliability.”

Additional information and a video describing the features and benefits of the Durco Mark 3 ISO pumps are available at www.flowserve.com/mark3iso.

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 website at www.flowserve.com.

Technical Contact: Mike Mullin, director, investor relations, (972) 443-6636

Media Contact: Steve Boone, director, global communications and public affairs, (972) 443-6644

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