Soft seal floating ball valve operating torque is based on the room temperature, the cleaning media computing. For high-temperature, low-temperature working conditions and non-clean media, will lead to an increase in the valve operating torque. The following table soft seal floating ball valve operating torque for drive selection reference.

Valve opening and closing process, the need to stop force and closing moments of change, and its maximum is close to the final instant or open the initial transient. Some special conditions for opening and closing speed of the process have special requirements.

Valve torque calculation specifically: half valve diameter squared × 3.14 draw is the area of ​​the valve plate, and then multiplied by the bearing pressure (ie valve working pressure) derived axis withstand static pressure, multiplied by the coefficient of friction (go lookup general coefficient of friction of 0.1 steel, steel to rubber friction coefficient of 0.15), multiplied by 1000 that was the valve shaft torque, in units of Nm, electric and pneumatic actuators reference Security the torque value is taken 1.5 times the valve.