Flow control specialist Bürkert has introduced compact solenoid valves conforming to ATEX/IECEx, as well as meeting DVGW EN 161. The updated versions of the company’s direct-acting plunger valves offer connections and variants to suit many applications.
The 2/2-way Type 7011 with an orifice diameter up to 2.4 mm, and 3/2-way Type 7012 with an orifice diameter up to 1.6 mm are both available in normally open and normally closed configurations. The valves feature a compact design, using AC08 coil technology to optimise the ratio between the iron circuit and the solenoid coil winding.
When multiple valves are used in combination, size advantages can be made greater using a Bürkert-specific flange variant with a space-saving arrangement of valves on a multiple manifold.
The valve body is constructed from brass and stainless steel, combined with FKM/EPDM seals and O-rings. IP65 ingress protection is achieved with the cable plug and ATEX/IECEx cable connection, making the valve impenetrable to dust particles and water jets.
The stopper and core guide tube are also welded together to increase pressure resistance and leak-tightness. As a result of the design updates, the DVGW fuel gas variant can be used with a maximum operating pressure of 42 bar. Meanwhile, the solenoid valves also provide reliability at higher temperature, up to a maximum of 75 °C for the standard versions.