Product category:
Valves and manifolds
News Release from: ASCO Joucomatic | Subject: 327 series
Edited by the Processingtalk Editorial
Team on 27 July 2005
Poppet valves meet maximum safety
demands
The new Asco Joucomatic TUV-certified (IEC61508) 327 series of poppet valves satisfies the requirements for the highest levels of operating safety, SIL-4/AK-7, in explosive and hazardous environments
The new Asco Joucomatic TUV-certified (IEC61508) 327 series of poppet valves satisfies the requirements for the highest levels of operating safety SIL-4/AK-7 in explosive and hazardous environments The 327 series is intended for high flow applications in oil, gas and chemicals industries, where there is a requirement for large process valves and actuators (especially diaphragm types) to be opened and closed, quickly and safely
This article was originally published on Processingtalk on 3 Apr 2006 at 8.00am (UK)
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The new, TUV certified (IEC 61508) 327 series of poppet valves satisfies the requirements for the highest levels of operating safety SIL-4/AK-7 in explosive and hazardous environments
ASCO Process Scope at ACHEMA
Visit the ASCO stand at ACHEMA to find out about ASCO Process Scope, the most complete source of specialist solenoid valve information for instrumentation engineers working in the process industry
The 327 series is manufactured with either stainless steel (AISI 316) or brass bodies, and stainless steel internals, for use on a wide range of fluids including air, inert gas, water and oil.
It is designed for pilot applications in hazardous environments: those requiring, high flow, wide pressure ranges and no minimum operating pressure.
In these applications, the direct operating mechanism of these valves ensures more reliability over periods of prolonged operation.
Further reading
Correct valve sizing in process applications
A discussion on the correct sizing of valves in process industry operations, which is essential for precision, quality and safety: oversizing is as bad in its effects as undersizing!
The greater the risk, the higher the SIL
Steve Meadows of Asco Joucomatic explains the function of Safety Integrity Levels in the new draft IEC61511 standard for the process industry sector
This is the result of a design that obviates the requirement for bleed holes that could introduce corrosion, by inducing air into the valve.
An additional advantage of the design is that the direct acting mechanism operates on zero pressure differentials, so the valve has no required minimum operating pressure.
Complementing this design feature, special seals and PTFE riderring ensure that the valves will reset reliably, without sticking, after long periods energised.
The 327 valves are supported by one of the widest ranges of ATEX approved enclosures and operators available.
These range from epoxy moulded units (IP65/II 3G/2D EEx nA II) to IP67-rated, stainless steel epoxy coated enclosures (EEx em II), which meet all the requirements of EN50019, EN50028 and 50281-1-1.
Also designed for use with the 327 valves is the new Asco Joucomatic (WS)NF/NL family of flameproof operators.
Meeting Category 2 requirements of the ATEX Directive (II 2 G/D EEx d IIC), the operators are manufactured in stainless steel (WSNF), cast iron (NL), and lightweight aluminium (NF), which is epoxy coated to combat corrosion.
All the new operators are available as both push or pull type solenoids and can be supplied on a wide range of Asco Joucomatic valves including direct acting solenoid and solenoid pilot operated types in 2/2 3/2 and 5/2 configurations. Request a free brochure from ASCO Joucomatic ...
They offer ingress protection to IP67 and are easy to install via a combination of a screw terminal coil and the provision of an industry standard 0.5inch NPT threaded cable entry, the latter also being offered in an M20 option.
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