Sealed central heating systems are the most commonly used form of heating system installed throughout most of Europe and the rest of the developed world. To accommodate for increases in water pressure sealed central heating systems require an expansion vessel to be installed.
An expansion tank or vessel is a small tank which is used to protect cold water heating systems from excess levels of pressure when the heating system is at its maximum heating capacity. When water is heated in a closed heating system it expands creating an increase in pressure. To protect the heating system from becoming damaged an expansion tank is an essential part of the installation process.
Expansion vessels can come in a variety of shapes and sizes however the majority of expansion vessels are designed with the same principles in mind. The expansion vessel itself is separated in to 2 sections by a flexible diaphragm in the middle.
Half of the expansion vessel is empty and the other is pre pressurised with air. When an expansion vessel is installed as part of the heating system the water enters the empty half of the tank, allowing extra room within the system. As the temperature of the water increases so does the water pressure. Once the water reaches its maximum temperature and pressure the diaphragm flexes against the pre pressurised air cushion providing more room within the expansion vessel.
At Direct Heating Supplies we stock a great selection of boiler expansion vessels in sizes ranging from 8 to 80 litres, so you are bound to find one perfect for your personal heating needs. Contact our sales team on 0800 181 4488 for friendly advice and information on our expansion vessels or explore our range today.
Product Type Expansion Vessel£103.16 inc. VAT £85.97 Ex. VAT
Product Type Expansion Vessel£104.84 inc. VAT £87.37 Ex. VAT
Product Type Expansion Vessel£109.01 inc. VAT £90.84 Ex. VAT
Product Type Expansion Vessel£127.15 inc. VAT £105.96 Ex. VAT
Product Type Expansion Vessel£160.31 inc. VAT £133.59 Ex. VAT
Product Type Expansion Vessel£189.66 inc. VAT £158.05 Ex. VAT
Product Type Expansion Vessel£264.70 inc. VAT £220.58 Ex. VAT