Boiler house Feedtank ancillaries
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Local regulations may restrict the use of this product to below the conditions quoted. In the interests of development and improvement of the product, we reserve the right to change the specification without notice. © Copyright 2019
TI-P401-25 EMM Issue 4
DH Type Flash Condensing Deaerator Heads
A simple low cost solution for deaerating boiler feedwater at atmospheric pressure - Mixes hot and cold incoming flows - Liberates oxygen and other gases - Stainless steel for long maintenance free life - Easy to install
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Description Spirax Sarco flash condensing deaerator head is designed to mix incoming flows of cold make-up, condensate return and flash steam to the boiler feedtank. This mixing action is achieved by directing the downward flow through a baffle arrangement within the unit. This liberates dissolved gases from the cold make-up, which are vented to atmosphere. The cold make-up inlet is fitted with a spray screen which diffuses the flow, increasing its surface area to promote thorough mixing with the condensate and flash steam. A Spirax Sarco flash condensing deaerator head consists of three parts: - A mixing unit, which is bolted to the top of the tank and is supplied with connections to customer specification for cold make-up, condensate return, flash steam from blowdown etc. - An immersion tube, which distributes the mixed fluids into the tank and has an integral plate flange which is sandwiched between the tank and mixing unit flanges. Immersion tubes are fully described in separate literature. - Gaskets. Two gaskets are required, one fitted each side on the immersion tube flange. They are ordered separately. Available types The mixing unit is available in five nominal diameters (DN150, DN200, DN250, DN300 and DN400) flanged to EN 1092 PN16 or BS 7076 Class 150. Immersion tubes are available in diameters to suit the deaerator heads and lengths of 950, 1200, 1600 and 2100 mm to suit TM metric feedtanks. Since each deaerator head is built to suit specific plant requirements we recommend that your local Spirax Sarco Engineer is contacted for a connection layout sheet and to discuss your requirements.
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