Heating Expansion Vessels
|HEATING VESSEL SIZING GUIDE|
|Boiler Output||Vessel size per System Static head|
This Guide is for approximation only. For full calc. refer to British Standard.
IBHS offer a complete range of expansion vessels to meet the requirements of most heating or cooling systems.
Expansion vessels for heating systems are manufactured to meet the requirements of PED 97/23/EC Directive and BS EN 13831:2007 'Closed expansion vessels with built in diaphragm for installation in water'.
The two halves of the vessel and the diaphragm are retained by a crimped collar to give a pressure tight seal.
- Non-Replaceable diaphragm
- Epoxy coated in red
Suitable for flow temperatures up to 120°C, resistant to ethylene or propylene glycol mixtures and has low gas permeability.
All our expansion vessels are all tested according to the Pressure Systems Directive.
How it Works
In a closed heating system water cannot be compressed so any increase in volume. created by an increase in temperature, has to be accommodated by an expansion vessel.
When water is cold, the pre-charge pressure forces the diaphragm against the tank towards the inlet.
As the temperature decreases, the pre-charge pressure forces the water from the tank and back into the main heating system.
This maintains a constant pressure within the heating system helping to reduce energy consumption.
Shell Carbon Steel
Connections Carbon Steel
Diaphragm Synthetic Rubber Compound
Coating Powder Epoxy
Max Working Pressure 8-35 ltr 3 bar
50-140 lre 6 bar
Test Pressure 1.5 x Max Working Pressure
Max. flow operating temperature 120°C
Max. vessel operating temperature 70°C
Factory air pre-charge 1.5 bar - Nitrogen