- RelianceAquasystem 100 Litre Potable Expansion Vessel Xves050110

B&Q

Aquasystem 100 Litre Potable Expansion Vessel XVES050110Features:Vessel with internal membrane preventing water contact with the steel shell, stopping internal corrosion.Vessel can be serviced without being removed due to replaceable membrane.Vessel has pre-charged valve for topping up air pressure.Product: Blue 100L VesselPer-set Pressure (bar): 3.5Max Pressure (bar): 10Height: 849mmDiameter: 495mmConnection: 1″ MBSPCode: XVES050110Product description:These expansion vessels for potable hot water are manufactured to comply with UK water regulations and are tested and certified by WRAS.Supplied with a replaceable membrane which separates the water and air, to prevent contamination of the water system, corrosion of the pressure vessel or pressure loss in the water system.Typically pressure vessels are used in pumped systems. When the pump starts, the pressure inside the vessel begins to increase. Once the vessel is full and the pump has reached its high pressure setting it will switch off. When water is then drawn off from the system the air pressure surrounding the membrane will force the water out of the pressure vessel and into the system. Once the membrane is fully deflated and the system has reached its minimum pressure, the pump will start on its low pressure setting and will begin the cycle again.The purpose of this system is to prevent constant cycling of the pump and continuous running when the system is being used.One of the main purposes of an expansion vessel is to compensate for the increase in volume of water due to the varying water temperatures in hot water systems. When water is heated it expands and as water is not compressible this increased volume will create a rise in pressure within the system. As an example: water being heated from 0°C-100°C will increase by approx 4.5%.