Valves suit hazardous environments
An
Asco Numatics product story
Edited by the Engineeringtalk editorial team
Dec 15, 2005
Asco Joucomatic's 551 series of stainless steel (316L) valves is for use in corrosive and hazardous environments in the petrochemical, process, chemical, oil, gas and food industries.
Asco Joucomatic's 551 series of stainless steel (316L) valves is for use in corrosive and hazardous environments in the petrochemical, process, chemical, oil, gas and food industries.
Atex approved for all categories including 1GD (zones 0/20) and/or SIL level 4, the marine grade valves are particularly suited to piloting process actuators in hazardous areas, both on and offshore.
Designed with an environmentally protected construction, the valves protect against the ingress of liquids, dust or other foreign matter.
They also provide the facility for all valve exhausts to be piped away, improving environmental protection in sensitive areas such as clean rooms, and in markets such as pharmaceutical and food processing.
To improvee reliability in corrosive environments, the valves employ internal parts of 316L or 304L stainless steel and seals of silicone and polyurethane.
This combination lets the valves be used on filtered air and neutral gases at pressures up to 10bar, and across an ambient temperature range from -40 to +60C.
The 551 series are 0.635cm valves which are available in Namur interface and body ported (BSP and NPT) versions.
They are offered as 3/2 or 5/2 configurations, with either monostable (solenoid/spring) or bistable (solenoid/solenoid) operators.
In both cases, the solenoids have can be equipped with manual impulse-type overrides.
The flexibility of the design means it can be equipped with the firm's solenoid enclosures, including IP65 epoxy-moulded general purpose types, intrinsically safe waterproof versions, increased safety EEx em types, cast iron/aluminium EEx d variants, and UL and CSA approved units.
They can also be used with the firm's family of flameproof (II 2 G/D EEx d IIC) operators.
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