Thursday 9 September 2010

Pilot for spool valves

Ultra Low Power pilots with flapper nozzle technology are ideal for use in explosive atmospheres or industries where harmful substances are present

ASCO Numatics has introduced an ultra low power pilot for its Series 551 Pilot Valves. The new pilot features flapper nozzle technology and is designed to be mounted on pneumatic solenoid valves used in explosive atmospheres or industries where harmful substances are present. These include the chemical and pharmaceutical industries, oil and gas refineries and other industries that are subject to the ATEX directive.

Available with either a ¼" tapped connection or NAMUR interface, the new valve is suitable for operating voltages between 16 and 40v and has an ultra low power consumption of just 30 mW. Compatible with all manufacturers of safety barriers, the new valve is designed to resist the challenges of industrial environments. The proven flapper nozzle technology provides a long operating life of 25 million cycles.

The ultra low power pilot is available as 3/2 – 5/2 single coil or dual coil version and the IP65 reinforced plastic enclosure is rated to II 2G Ex ia IIC T5/T6 (category G zone 1) according to the latest ATEX (EN 50018) and global IECEx standards.

The ultra low power pilot joins the extensive line-up of low power valves for industrial applications available from ASCO Numatics. This includes the Series 630 Piezotronic Valve which, because of its extremely low power consumption (7mW), is ideally suited for use, in battery operated equipment and in fieldbus networks as standard. The Ex ia specification version is suitable for installation in explosive areas.

The long service life of 1 billion cycles means that piezotronic valves are ideally suited to applications in measuring systems such as medical equipment and gas analysers as well as in the chemical and pharmaceutical industries. Their low weight makes them particularly suitable for use in portable equipment.

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