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Calculators › Floating Ball Valve › Total Torque
Floating Ball Valve Suite · Q5-6/8

Floating Ball Valve Total Torque

Sum total operating torque M from seat friction, packing, and thrust components, then compute handwheel force F=M/L.

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API Q41F 4" 300Lb · Valve Design Manual · PASS/FAIL Verdicts
Floating Ball Valve Total Torque
Core Formula:
Mm = π·(D2+D1)²·P·R·uT·(1+cosφ) / (32·cosφ)
M = Mm + Mt + Mu
F = M / L

Why This Calculator

Seat Friction Mm

Torque from medium pressure acting on the ball-seat seal area.

Friction Torque Sum

Combines packing Mt and thrust Mu into total friction torque.

Operating Force F

Handwheel or lever force from total torque divided by lever arm L.

Handwheel Lever L

Configurable lever arm length for force calculation.

Total Torque M

Complete operating torque for valve actuator sizing.

Part of Design Suite

Module 6 of 8 in the Floating Ball Valve design verification suite.

How It Works

Sum Component Torques

Add seat friction Mm, packing Mt, and thrust Mu torques.

Input Lever Length

Enter handwheel or lever arm length L in mm.

Compute Total M

Calculate total operating torque from all components.

Calculate Force F

Divide total torque by lever arm for required operating force.

Who Is It For

Valve Design Engineers | R&D Teams | QA/QC Engineers | Maintenance Planners

Key Highlights

Total TorqueOperating ForceValve Design ManualAuto Calculation

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Enter your design parameters and get instant verification results.

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