Powerful valve actuator BIOVENT® control valves are usually combined with pneumatic multi-spring ARCAPAQ actuator type 813. Not only is it cost effective, robust, and explosion proof, but also provides short stroking times and a constant seating force. The actuator is available in different sizes optimised in line with the required actuating force. Multi-functional positioner Thanks to the digital ARCAPRO® positioner, BIOVENT® control valves are equipped with a multifunctional interface with the controller or process control system and operate as standard with 4-20 mA. HART, Profibus (PA), and Foundation Fieldbus, for example, are used to establish a digital interface with bi-directional data exchange (including status messages).