potable water expansion vessels vertical range
■Altecnic offer a complete range of expansion vessels to meet the requirements of most heating systems and for use with potable water.
■The expansion vessels are manufactured to meet the requirements of PED 97/23/EC Directive and BS EN 13831:2007 ‘Closed expansion vessels with built in bladder for installation in water’.
●Design
■Manufactured in carbon steel with a two or three part weld construction.
■Pre-pressurised air chamber with synthetic rubber compound bladder.
■Sizes 60 to 1000 litres (except 140 litres) have a replaceable bladder.
■The internal surfaces of the vessel in contact with the water are coated against corrosion.
■External surfaces have a blue durable powder coated finish.
■Suitable for temperatures up to 70 ̊C, resistant to ethylene or propylene glycol mixtures and has low gas permeability.
■Altecnic expansion vessels are all tested according to the Pressure Systems Directive.
●How It Works
■In a closed hot water circuit, the 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 bladder to collapse until the pump is started when the bladder starts to inflate.
■As the temperature in the system increases, with the associated increase in pressure and volume, the expanded water enters the bladder creating additional volume and lowering the pressure.
■When the temperature decreases, the pre-charge pressure forces the water from the bladder and back into the main water circuit.
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PV2W 、 PV8W 、 PV12W 、 PV18W 、 PV25W 、 PV33W 、 PV50W 、 PV60W 、 PV80W 、 PV100W 、 PV140W 、 PV200W 、 PV300W 、 PV400W 、 PV500W 、 PV600W 、 PV800W 、 PV1000W |
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[ heating systems ][ potable water ] |
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Datasheet |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2019/1/16 |
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AL 104 15-01-19 |
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396 KB |
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