Low power Ex d pilot valve with IEC Ex Approval
12 January 2010
ASCO Numatics has introduced a low power pilot with Ex d certification for its compact 551, 552 and 553 series pilot valves. The valve is available with either an aluminium or stainless steel enclosure, and with a power consumption of just 0.5W at 24V dc, has the lowest consumption of any Ex d certified valve for the process industry. The low wattage coil reduces battery drain and heat rise, minimises wiring costs and provides energy savings. The savings in power usage over the installed life of the solenoid valve lower the total cost of ownership.
Compatible with the ASCO Numatics 551-553 ranges in aluminium, brass (551 range only) and stainless steel, the valves have a large flow range of up to 860 l/min for the 551 valve and 3800 l/min for the 553 valve. Certified according to ATEX, IEC Ex and FM, the new range is ideally suited to applications in the offshore market where high levels of safety and superior resistance to aggressive operating environments are required.
The housing and cover of the enclosure are in 316L stainless steel or painted aluminium and the operator can be rotated 360° to select the best position for cable entry. Electrical connection is via either a shielded or unshielded cable gland (½ NPT) to easy access screw terminals.
The enclosure is supplied with a plastic exhaust protector fitted as standard and a metal exhaust protector is available as an option. The operators are suitable for use in ambient temperatures from -40°C to +60°C, and the flameproof enclosure is rated to 112GEx d IIB + H2 T6, 112DEx tD A21 IP67 T85°C, Certification: IEC Ex, ISA and EN 60079-1, 61241-1.
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