ATEX pneumatic valves for harsh environments
12 January 2018
ATEX pneumatic valves are equipped with ELEMENT valve controllers, which were initially designed to operate CLASSIC (Bürkert’s) range of process valves, and and they are now rapidly becoming the global standard for process control. Having already been developed to control third-party process valves, the latest improvements include ATEX and IECEx approvals for operation in Zones 2/22 and 1/21 where potentially explosive atmospheres may exist.
Development of the commonly used valve actuator includes the Type 3004 actuator, which is classified as ATEX II 2 GD Ex d II B T6 and rated to IP67 and therefore suitable for installation in areas classified as Zone 1.
Another enhancement is made using servo-assisted pneumatic valves, such as the Type 6519, which can be installed individually or in manifolds and can be used to control double or single acting actuators. Available in EEx m and EEx i versions, they provide a high flow rate capacity and reduced power consumption.
ATEX’s AirLINE Ex 8650 is the only electro-pneumatic automation system designed for installation in Zone 1. It can be used for fine chemicals, pharmaceuticals, cosmetics and oil & gas and this system is particularly suited to decentralized process.