All toolsCalculatorsMechanicalExpansion Vessel Sizing
Expansion Vessel Sizing
UK sealed-system expansion vessel sizing using Vv = Ve / (1 − P0/Pmax), with a suggested standard vessel size.
The Ensign ToolboxExpansion Vessel SizingUK sealed-system expansion vessel sizing using Vv = Ve / (1 − P0/Pmax), with a suggested standard vessel size.
System
L
Boilers, pipework, emitters, etc.
°C
°C
Uplifts expansion factor
Expansion Factor
Pressures
m
Vessel to highest point (1 bar ≈ 10.2 m)
bar
Typical 0.2–0.5 above static
bar
Pmax = SV − this value
Enter system volume to size vessel