Eccentric stem torque: seal friction + bearing friction + packing friction + static + dynamic torque. Formula: MD = MM + MC + MT + Mj + Md
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Total MD = MM + MC + MT + Mj + Md comprehensive calculation.
MM = qM * π * DMN * bM * fM * (R + h) for eccentric seal.
MC from bearing load QC and stem diameter dF.
Md from water hammer and hydrodynamic disc resistance.
MT from packing factor ψ and packing dimensions.
Includes dynamic pressure surge from valve closure.
Input qM, R, bM, fM, h for seal friction torque MM.
Input dF, fC, ψ, bT for bearing and packing friction.
Input Q, A, t, ζα, ζ0, V0 for dynamic torque Md.
MD = MM + MC + MT + Mj + Md for actuator sizing.
Enter your design parameters and get instant verification results.
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