Rotary Electric Actuators for Butterfly Valves and Ball Valves
Ball valves and butterfly valves can be actuated electrically. As opposed to gate valves, single turn or part turn electric actuators are applied in the case of ball valves and butterfly valves. They can be rotated from 0° to 360° within one turn.
Ball valves and butterfly valves are sometimes used as control valves, so their range of operations is wider than that of the gate valves:
- automatic, remote or manual opening and closing of valves or stop in any intermediate position;
- indication of rate of opening and closing by means of direct indicators;
- position control of closure member in any intermediate position;
- signal-conditioning of intermediate and final position of the closure member;
- overload protection.
The following design versions of electric actuators for ball valves and butterfly valves can be produced:
- general purpose industrial version;
- explosion-proof version;
- actuators for nuclear power stations.
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