Altecnic expansion vessels are manufactured to meet the requirements of Pressure Equipment Directive 2014/68/EU, and BS EN 13831:2007 ‘Closed expansion vessels with built in diaphragm for installation in water’. DesignThe vessels are fabricated by welding the various sections together which results in a very reliable structure suitable for internal pressures up to 6 bar.Epoxy coated and available in red.Non-replaceable diaphragm held securely in place by a flange.Suitable for temperatures up to 100˚C, resistant to ethylene or propylene glycol mixtures and has low gas permeability.In the event that the diaphragm within the expansion vessel could be subjected to continuous temperatures above 100˚C, the vessel must be protected by an additional vessel (VDI 6002 directive). Altecnic Eres 24L Heating Vessel C/W Bracket & Strap