Sizing

gtbv3v

Three-Way Valve Sizing

V3V sizing — Cv, authority, network ΔP.

kvs
authority
δp

Catalogue Kvs · R5 series

6.3m³/h

DN 20 to DN 32

Authority a

0.7

Optimal

Authority 0.70 in [0.50 ; 0.70]: target range.

Nominal Q : 4.299 m³/h

Details

Required theoretical Kv: 9.61 m³/h
Actual ΔPv: 46.56 kPa · 0.466 bar

Neighbouring alternatives

Kvs	ΔPv	Authority	Verdict
4	115.5 kPa	0.85	Acceptable
10	18.5 kPa	0.48	Borderline

Calculation assumptions

fluid cp: 4,186 J/(kg·K)
fluid ρ: 1,000 kg/m³
cp·ρ / 3.6e6: 1.163 kWh/(m³·K)
Formula: Q [m³/h] = P [kW] / (1.163 · ΔT [K])
Reference: EN 60534-2-1 — turbulent, non-cavitating flow, ρ₀ = 1000 kg/m³.