Expansion Vessels / Surge Arrestors / Accumulators / Hydrophore Tanks

Expansion Vessels are used by many water authorities, water treatment facilities and  pumping systems. They are used on board ship and  oil rigs. Fire control systems use them for pressurised foam and water systems.

We fabricate non standard vessels to customers requirements and manufacture a range of standard vessels.

Expansion Vessels, Water Authorities, BS5169, PD5500, Bladder, DWI, potable water, hydrophore, WRAS

Our Standard range offers sizes from 100-2000 litre capacity. We offer a wide range of Design Pressures of 7, 10, 16 & 20 bar. All  vessels are fitted with replaceable rubber bladders, suitable for potable water at temperatures up to 100ºC with acceptance levels approximately 50%.

When used with water, the membrane prevents the buffer air from being absorbed into the water.

Design Codes

Designed and Manufactured to PD5500, BS5169, DNV, BV, ASME, Lloyds 2/2, ABS and many others

For more information, please click – Expansion Vessel, PDF. Bladder Type  –Expansion Vessel Installation Instructions.


Finished in exterior quality enamel gloss paint (primer on request.) Alternatively paint  can be to your own specification inside and out.  DWI approved paint spec is also available as an option.

hydrophore, Great British, DWI, quality, PD5500, BS5169, Design Code, Potable water, Lloyds, DNV, Bureau Veritas, ISO9001, EN13445, 97/23/EC CE, PED, water authority, DWI approved, copon hycote.

Expansion vessels / Hydrophore Tanks have Lifting eyes provided for convenience.

Special Expansion Vessels to customers specific requirements and also to higher pressure ratings can be Designed and manufactured.

For more information on our product range, click Pressure vessels. To request a quotation, please don’t hesitate to call or email.

Also called: Accumulators, Surge arrestors, Pressure Vessels, thermal expansion, hydro pneumatic, Surge Tanks, Process Tanks.