In quarter-turn valves, torque is the turning effort required to rotate the valve’s closure member or hold it in position. Knowing the valve torque is essential in actuator sizing. Major components of total shaft torque include seating, bearing, packing frictional torque and flow-induced hydrodynamic torque. simulationHub’s Autonomous Valve CFD application helps designers to quickly estimate the hydrodynamic torque in just few minutes. simulationHub team has written the article on this topic in the recently published Valve World magazine – Vol. 26, Issue 4, April 2021.