Actuator control system suit valves in ATEX areas

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Asco Numatics is introduces the 1/4inch and 1/2inch Asco Actuator Control System (ACS), a compact range of standard, explosion-proof systems for the control of actuators on process valves. The range comprises solenoid valves, spool valves, manual reset valves and filter regulators and may also feature redundant components to prevent unplanned shutdowns. The new range has many applications in the process industry and addresses the growing demand for manifold systems, especially in applications where corrosive atmospheres (for example offshore), are present.

The high-reliability modular Actuator Control System uses proven Asco technologies and is manufactured in 316L stainless steel to resist aggressive environments. Tested up to 150bar, the system features an optimised flow path and is said to be lighter, stronger and more compact than conventional panel-mounting assemblies.

Components are connected by means of a versatile, leak-tight coupling system and mounted on a vibration-resistant and shock-proof stainless steel base plate. The modular system eliminates complex arrangements using panels, pipes and additional fittings and is pre-assembled ready for use. Available in 1/4inch and 1/2inch NPT sizes, the system is claimed to be quick and easy to install and maintain, offering significant savings in the total installed cost.

Many configurations are possible, with filter regulators and various single or redundant valves with wide pressure ranges and no minimum operating pressure. A selection of explosion-proof solenoids is available with ATEX/IECEx (Ex d, Ex em, Ex i), NEMA, UL and CSA approvals. In addition, the solenoid valves are TUV-certified to IEC 61508 and can be used in safety instrumented systems with a safety integrity level (SIL) up to SIL-4, the highest rating.

The use of standard components in the actuator control system, together with a globally applied model numbering system, means that service and support is available from the worldwide network of Asco Numatics sales offices and distributors.

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