Fixed Trunnion Ball Valve Stem Strength Calculator

Torsional stress verification at stem sections I-I, II-II and III-III with optional double-torque check

Input Parameters

Ball Seal Torque MM N·mm

Total Stem Torque M N·mm

Torque Multiplier (1 or 2) -

Section Coefficient β -

Head Rect Thickness a mm

Stem Head Dia DT mm

Stem Diameter dT mm

Connection Dia d mm

Keyway Width b mm

Keyway Depth t mm

Allowable Stress [τN] MPa

Allowable Factor [λ] -