Electromotive control valves contribute to process optimisation
29 March 2016
With its Type 3360/3361 electromotive seat valves, Bürkert believes it is now able to offer a process control valve that sets new standards with respect to performance, reliability and cost-effectiveness.
Potential uses for the new valves include applications with stringent requirements for control accuracy and process stability, as well as applications where operation without a compressed air system is advantageous.
A particular feature of the new valve is its performance, which is said to be comparable to that of pneumatic actuators. With a control speed of 6 mm/sec and a closing time of less than four seconds the valve improves on the traditional weak point of many electromotive process control valves.
The Type 3360/3361 valves allow adjustment of the control speed to the requirements of a specific application, in addition to definition of the stroke and closing limits and soft approach of end positions.
When compared with pneumatic, spring-balanced actuators, the electromotive valves are able to travel to the desired position virtually without delay and without overshooting and remain stable regardless of the media pressure.
In the event of a power outage the safety position can be approached via the optional energy storage pack. Emergency manual movement is also possible.
The new electromotive process control valves are intended for use in applications in where the use of compressed air is not desired or is not possible, such as in large-area storage systems with long distances to the single valves, as well as systems for mobile, decentralised water treatment.
Initially, the valves are available as an angle seat valve (Type 3360) and a globe valve (Type 3361) in diameters from DN15 to DN50. They can be used with gases, liquids and steam and are designed for temperatures from -10 to 185°C. The maximum operating pressure is 16 bar. Future developments will be a process controller, membrane valves, a connecting diameter up to DN 100, a open/close solution and connection to other field bus systems in addition to Ethernet, Profinet and Modbus.
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