Trunnion Ball Valve Ball Weight

Ball weight calculation from geometric volume for fixed-shaft ball valves. Includes bore channel subtraction and gravity load for bearing design.

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Core Formula:
G = ρ · V · g
V = V_sphere − V_bore

Where:
• ρ = ball material density (kg/m³)
• V_sphere = (4/3)π(D/2)³, spherical volume
• V_bore = (4/3)π(d/2)³, bore channel volume
• g = 9.81 m/s² gravitational acceleration
• G = ball weight force (N), input for bearing and torque calculations

Why This Calculator

Geometric Precision

Accurate sphere-minus-cylinder volume model for hollow ball geometry.

Bore Channel Deduction

Flow bore subtracted from full sphere for true ball volume.

Material Density

Supports common valve body materials with standard density values.

Gravity Load Output

Ball weight G feeds directly into bearing pressure and stem torque modules.

Auto Calculation

Instant result from diameter and material inputs; no manual lookups needed.

Part of Design Suite

One of 12 modules in the complete Ball Valve Design Calculation suite.

How It Works

Enter Parameters

Input ball outer diameter, bore diameter, and material density.

Compute Volumes

Calculate sphere volume and bore channel volume separately.

Calculate Net Volume

Subtract bore volume from sphere for the true ball material volume.

Determine Weight

Multiply by density and gravity to get ball weight G for downstream checks.

Who Is It For

Valve Design Engineers | Structural Analysts | Manufacturing Engineers | R&D Teams

Key Highlights

Geometric VolumeBore DeductionGravity LoadInstant Result

Ready to Calculate?

Enter your design parameters and get instant verification results.

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