Tanks comply with Pressure Equipment Directive
March 1st 2004

Designed to comply with the Pressure Equipment Directive, Thermal Technologys blowdown tanks are constructed in accordance with British Standard PD.5500 2000 Category 3. The seven sizes in the range cover most normal applications and each tank is fitted with three flanged tangenital inlets as standard. By blowing down a steam boiler, dissolved solids in the boiler water and accumulated sludge deposits are removed/reduced and, if blowdown is controlled correctly, these will be maintained at an acceptable level. The frequency and volume of blowdown will depend on the quality of the feed water, the type of water treatment and the rate of evaporation. Steam boiler blowdown is high pressure hot water and as soon as it leaves the blowdown valve, flash steam starts to form. This flashing mixture of water and steam is introduced tangentially into Thermal Technologys blowdown tank. A vortex is formed within the tank, releasing pressure and allowing flash steam to rise to the vent. The remaining water containing dissolved solids and sludge falls into the lower half of the tank. The amount of blowdown that tanks can accept is determined by boiler pressure, blowdown valve size and the equivalent length of pipework between boiler and tank.

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