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For a fraction of the cost, size, and weight of globe control valves, Clarke Valve™ products deliver precision flow control, minimal cavitation and turbulence, and greater rangeability. Download our latest brochure to learn more.

Download: Clarke Valve Digital Brochure 2019

ISO 15848-1:2015,  “Industrial valves – Measurement, test and qualification procedures for fugitive emissions” outlines the testing requirements for control valves and isolation valves. Control valves must cycle from 40% open to 60% open more than 100,000 times to achieve a CC3 endurance rating, and must allow less than 50 parts per million by volume leakage of methane to achieve the Class AM tightness rating.

Download: ISO 15848-1:2015 Certification

The API 641 standard applies to all stem seal materials and requires a stringent maximum allowable leakage of 100 parts per million by volume (PPMv). This API test standard calls for 610 cycles of the valve​ under extreme temperature fluctuations to evaluate emissions performance over an accelerated life cycle.

Download: API 641 Certification

These product bulletins show the features that make the Shutter Valve the first major innovation in flow control in the last 50 years. The parts schedule and application areas are also included.

Download: SI Units / English Units

Rangeability of a control valve may be defined as the ratio of its maximum controllable flow rate to its minimum controllable flow rate.

The Shutter Valve far exceeds the rangeability of other valve types, while maintaining a compact design and very low torque requirements.

1″ Shutter Valve versus Ball and Butterfly Valves DOWNLOAD

1″ Shutter Valve versus Globe Valves DOWNLOAD

2″ Shutter Valve versus Butterfly Valve DOWNLOAD

2″ Shutter Valve versus Rotary Ball Valves DOWNLOAD

2″ Shutter Valve versus Globe Valves DOWNLOAD

4″ Shutter Valve versus Butterfly Valves DOWNLOAD

4″ Shutter Valve versus Rotary Ball Valves DOWNLOAD

4″ Shutter Valve versus Globe Valves DOWNLOAD

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