Home > Novel half-inch bore instrumentation needle valve from Parker Hannifin boosts reliability in viscous and contaminated media applications

Novel half-inch bore instrumentation needle valve from Parker Hannifin boosts reliability in viscous and contaminated media applications

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article image Half inch needle valves from Parker Hannifin

The new half-inch (12.7 mm) bore instrumentation needle valve from Parker Hannifin gives plant engineers the means to improve reliability, and cut costs, in process and instrumentation applications involving viscous and contaminated media. Traditionally such applications are implemented using much larger and more expensive piping valves.

Parker's new H-series needle valve is available in two forms:

  1. A discrete hand valve for controlling media flow     
  2. Integrated into a monoflange-style manifold for the safe 'double-block-and-bleed' connection of instruments to process lines
Features of the H-series needle valve include:
  • The H-series needle valve has a bore size of 1/2 inch/12.7 mm, with a Cv value of 2.6.
  • In its standard form the needle 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 needle valve also meets the firesafe requirements of ISO 10497 which is the international equivalent to the API 607 and BS6755 Part 2 standards
Benefits of the H-series needle valve include:
  • The large flow path of the half-inch H-series needle valve makes it much less prone to blockages and other such problems, expecially when dealing with viscous and contaminated media.
  • The new half inch needle valves also offer a metal-to-metal seal, providing 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 innovative design of the half inch valve can help process engineers achieve new levels of compactness and performance in a wide range of process and instrumentation applications used in the manufacturing and industrial sectors.
Applications of the H-series needle valve include level measurement, 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 is prone to hydrate deposition - saving considerable weight and size compared with conventional double-block-and-bleed manifolds

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