Clarke Valve announces the API 641 certification of its proprietary
Shutter Valve design, the first control valve to achieve this
certification of low fugitive-emission performance.
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.
Fugitive emissions from legacy valve designs in industrial facilities
are a major contributor to air pollution and greenhouse gases. Kyle
Daniels, President & CEO said, “Most people are unaware that 80%
of refinery methane emissions come from traditional valve stems. Since
the Shutter Valve’s unique design provides a superior seal at the valve
stem, it drastically reduces these emissions.”
The patented Shutter Valve, by Clarke Valve, was independently tested by
Yarmouth Research and Technology, LLC, who certified the valve passed
testing with less than 20 PPMv of leakage, well below the 100 PPMv
limit. “We are excited to offer the only full-bore control valve in
the world that eliminates virtually all fugitive emissions,” said
The Shutter Valve’s distinct design, already the best performing control
valve in the world, is now also the most environmentally friendly
control valve ever certified.
Valve is the creator of the revolutionary Shutter Valve, a full-bore
control valve developed utilizing advanced aerospace design techniques.
This innovative valve design provides ideal attributes for industrial
control valves, including unsurpassed flow rate, zero pressure drop,
zero leakage, and reduced cavitation & pitting, resulting in improved
wear/maintenance characteristics and precise flow control. Clarke Valve
products are custom-engineered to meet customer needs and assembled at
their headquarters in North Kingstown, Rhode Island.
Research and Technology is an independent testing laboratory in
North Yarmouth, Maine that provides services to manufacturers and
end-users of chemical process equipment, such as valves, packing,
gaskets, seals and other flow control products. All testing is certified
by a Professional Engineer.
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