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How to caculate the torque value of ball valves ?


The torque required will be primarily due to friction of the seals between the ball and the body and to a lesser amount the friction of the shaft seal. The variations in flow will have very little effect on the torque. Variations in pressure will have significant effect on the ball seals of a closed valve.

Torque for ball valves cannot be determined using a generic method. You must request the conversion table from the ball valve manufacturer.

 

 

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