Valve manufacturers publish torques for their products so that actuation and mounting hardware can be properly selected. However, published torque values often represent only the seating or unseating torque for a valve at its rated pressure. While these are important values for reference, published valve torques do not account for actual installation and operating characteristics. In order to determine the actual operating torque for valves, it is necessary to understand the parameters of the piping systems into which they are installed. Factors such as installation orientation, direction of flow and fluid velocity of the media all impact the actual operating torque of valves.
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