Needle Valve promotes reliability with 1/2 in. bore.
November 5, 2009 -
Stainless steel H-series helps improve reliability and conserve space in process and instrumentation applications involving viscous and contaminated media. It comes in 2 forms: discrete hand valve for controlling media flow, or integrated into monoflange-style manifold for safe double-block-and-bleed connection of instruments to process lines. Flow path size minimizes inclinations to blockages or related problems, and metal-to-metal seal offers bubble-tight shut-off.
Novel Half-Inch Needle Valve Boosts Reliability in Viscous and Contaminated Media Applications
large bore instrumentation valve provides alternative to pipe-class valves
hand valve and monoflange manifold versions provide application flexibility
Barnstaple, UK, November 3, 2009 -- A novel new half-inch (12.7 mm) bore instrumentation needle valve gives plant engineers the means to improve reliability, and save both money and space, in process and instrumentation applications involving viscous and contaminated media. Today, such applications are often implemented using much larger and more expensive piping valves.
Believed to be the first of its type on the market, the half-inch needle valve has been developed by the instrumentation products division of Parker Hannifin - the global leader in motion and control technologies.
Parker's new H-series needle valve is available in two forms: as either a discrete hand valve for controlling media flow, or integrated into a monoflange-style manifold for the safe 'double-block-and-bleed' connection of instruments to process lines.
The large flow path of the half-inch H-series needle valve makes it much less prone to blockages or related problems when dealing with viscous and contaminated media. Such issues can lead to measurement errors, necessitating costly maintenance or even process shutdown while problems are fixed. The new valve also offers a metal-to-metal seal. This provides a bubble-tight shut-off mechanism and operation over a very wide temperature range of -55 to +538 degrees C in its standard stainless steel form.
The H-series valve has a bore size of 1/2 inch/12.7 mm, with a Cv value of 2.6. In its standard form the valve is fabricated from 316 stainless steel, and is rated for operation at pressures up to 6,000 PSIG (414 barg). The metal to metal sealing of the new valve also meets the firesafe requirements of ISO 10497 (the international equivalent to the API 607 and BS6755 Part 2 standards).
The valve design can help process engineers achieve new levels of compactness and performance in a wide range of process and instrumentation applications involving difficult media. These applications include level measurement in refineries, chemical injection, gas lines that are prone to hydrate formation, and process lines carrying dangerous gases. The monoflange variant in particular extends application potential, as these space-saving manifolds are often favoured in sensitive applications such as skids for oil and gas platforms. By extending the bore size of monoflange needle valves to half an inch, engineers can now employ monoflange form-factor manifolds on skids handling liquid or gas media that are prone to hydrate deposition - saving considerable weight and size compared with conventional double-block-and-bleed manifolds.
Background information
With annual sales exceeding $10 billion, Parker Hannifin is the world's leading diversified manufacturer of motion and control technologies and systems, providing precision-engineered solutions for a wide variety of mobile, industrial and aerospace markets. The company employs approximately 52,000 people in 48 countries around the world. Parker has increased its annual dividends paid to shareholders for 53 consecutive years, among the top five longest-running dividend-increase records in the S&P 500 index. For more information, visit the company's web site at http://www.parker.com, or its investor information site at http://www.phstock.com.
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