Seven independent calculation modules for triple-eccentric butterfly valve design verification per Valve Design Manual. Covers body wall thickness, seal pressure, disc strength, stem torque and torsional stress with automatic PASS/FAIL verdicts.
Start with Body Thickness →
Thin-wall cylinder formula SB = P*Dn/(2.3*[sL]-P) + C with corrosion allowance
Sealing force QMZ and specific pressure: qMF ≤ q ≤ [q] verification
Empirical formula b = 0.054D*H^(1/3) including water hammer head
Bending stress at disc section through stem bores via inertia method
Bending stress via multi-section inertia summation JB = Sum(Ji)
MM+MC+MT+Mj+Md total eccentric torque with dynamic hydrodynamic component
Torsional stress at sections II-II and III-III with keyway correction
M1+M2: Verify body wall and sealing pressure
M3+M4+M5: Disc thickness and section A-A/B-B stress
M6: Calculate total operating torque
M7: Verify torsional stress at key sections
Run individual modules with shared design inputs. Each calculator provides formula details, input validation, and automatic PASS/FAIL verdict.
Start with the body wall thickness calculator and work through all 7 modules.
Launch Body Thickness Calculator