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A half-inch bore instrumentation needle valve from Parker Hannifin allows plant engineers to improve reliability in process and instrumentation applications involving viscous and contaminated media.

Today, such applications are often implemented using much larger and more expensive piping valves.

The new H-series half-inch needle valve has been developed by the instrumentation products division of Parker Hannifin.

The H-series needle valve is available in two forms: as 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 temperature range of -55C to +538C in its standard stainless-steel form.

The H-series valve has a bore size of 0.5in (12.7mm), 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 6,000psig (414barg).

The metal-to-metal sealing of the new valve also meets the fire-safe 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 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 extends application potential as these space-saving manifolds can be used 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 weight and size compared with conventional double-block-and-bleed manifolds.

Parker Hannifin — Parker Sales UK

With annual sales exceeding $10bn, Parker Hannifin is the world's leading manufacturer of motion and control technologies and systems, providing precision-engineered solutions for a wide variety of commercial, mobile, industrial and aerospace markets.

To meet its customers' needs in motion and control, Parker provides the broadest range of products available from any single supplier. This is supported by expertise in nine major technologies:

  • Hydraulics
  • Pneumatics
  • Electromechanical
  • Filtration
  • Process control
  • Fluid and gas handling
  • Sealing and shielding
  • Climate control
  • Aerospace

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