How to select actuator torque as the butterfly valve size
?

 The torque control, is how much moment or torque is used to open the valve properly. so this choice is very important
The torque of actuator valve is generally chosen by users or valve manufacturers,because the torque required by the valve is determined by the size of the diameter and the working pressure.there is no fixed formula to calculate.Each valve factory produces a different valve torque,the valve torque is measured through in practice.
So how to select the appropriate electric actuator as the diameter of butterfly valve?
-----Please reference the following table,the standard type and and specification of GRAT electric actuator .



Special explanation:The valve selection in the above table is only for reference.For some special products,the action time and Gyration angle can be designed according to customer’s requirement.