Pneumatic ISO spool monitored valves

Australian Safety Guarding has released its flexible and extensive range of pneumatic ISO spool monitored valves. Features include suitability for use up to category 4 applications as per AS-4024-1 standards; standardised port pattern conforming to ISO 5599/1; four available ISO sizes signifying a wider range of flow rates, solenoid or pneumatic pilot; an array of assorted spool configurations 3/2, 5/2, 5/3 with either blocked or exhausted centres; single and double monitored valves; two available spool monitoring switch configurations; solenoid coils to suit operating voltage type and mounting on custom dual redundant safety blocks.

The units are created by integrating ISO spool valves with positively driven safety switches that are directly operated by the valve spool via specially designed pneumatic end caps, thus enabling monitoring of the spool states and therefore valve operation. Pneumatic or electrical actuation of the valve results in linear motion of the spool, which in turn distributes flow through the valve control ports. As a result of moving in alternate directions in front of each connection, the internal spool mechanism permits the feeding port to connect with the application port or the application port with the exhaust port. Safe application entails correctly connecting, both pneumatically and electrically, two valves in series, to an approved safety device for monitoring of the dual redundancy.