04 November 2016

Precise, hygienic and dynamic switching and control

Bürkert Fluid Control Systems has expanded its product family of electromotive process valves to include diaphragm valves: the type 3323 shut-off valve and the Type 3363 control.

The valves with an electromotive actuator are ideal for applications that either do not require compressed air or for which compressed air is not available due to the difficulty of conveying it to the application. They feature high control accuracy and highly dynamic control, which allows them to reach the set point exactly and instantaneously with dynamic performance of 4 mm/s. The maximum closing time is below 4.5 s. Overshooting or undershooting, which can occur with pneumatic valves, is not possible. Integration of the piloting function in the compact drive eliminates the need for control cabinet installation, as well as field piping and the power supply for the compressed air. The electromotive drive principle allows adaptation of the driving force to the respective application, which increases the life of the diaphragms and maintenance intervals, thus reducing maintenance costs.

Safety is the top priority

Electromotive valves are very cost-effective due to their low energy costs and savings throughout the entire system. A special advantage of the solution is an innovative cogging torque controller, which fixes the position of the valve without additional energy consumption. If there is a power outage the safety position can be approached via the optional SAFEPOS energy storage pack. The safety position can also be adapted to the particular process. A mechanical position indicator with a 360° LED clearly indicates the position and status of the valve at all times.

The linear motion is executed by a brushless DC motor with a planetary gear via a low-friction, permanently lubricated ball screw. The robust powder-coated aluminium body features an easy-to-clean and closed design. The shut-off and control valves are resistant to weather, impacts and vibrations, which makes them ideal for use in harsh environments.

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