The technical specifications in my water project call for butterfly valves operating with manual hand wheel actuators, BUT valves shall have provision for electrical actuators . my concern is about the provision for electrical actuators? I need to know if all butterfly valves can be connected to electricl actuator or this is something optional and we need to ask the manufacturer for ,so as to manufacture the valve to match and to be compatible with electrical actuators ?
Electrical actuator selection is a case for electrical actuator experts and will involve among other things a full access of the electrical data and control schematic for the valves. This is very often not ready in the early stages of a water project, when the valves have to be selected.
Actuators will vary in price and size according to torque, closing time, current and voltage, extra possible gearing can size actuators up or down according to brand of actuator, mechanical detailed adaption to available mechanical interface on valve must be controlled - (often different adaption plates, or bosses must be detailed). In addition special details for electrical requirements may add to cost of the actuator, like position givers included etc.
Closing time requirement will vary according to waterhammer prevention, type of valve.

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