Accessories
Insulation
Insulation, designed for HVAC applications, is available for most PHE models. There are two different types of insulation– heating and cooling insulation. The reason for having two different types is that the mineral wool will be wet from condensing water if used
when the heat exchanger temperature is lower than the surrounding temperature. Polyurethane is more expensive than mineral wool, but technically the cooling insulation can be used for heating duties as well.
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- Heating insulation Heating insulation consists of 65 mm of mineral wool, cladded with a 1 mm aluminium sheet on the outside and aluminium foil on the inside. It covers all sides of the PHE including the frame and pressure plate, except downwards. The different parts are held together with snap catches.
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- Cooling insulation Cooling insulation consists of 60 mm of polyurethane, cladded with a 1 mm aluminium sheet on the outside and aluminium foil on the inside. It covers all sides of the PHE including the frame- and pressure plate, except down-wards, where there is a galvanized drip tray. The different parts are held together with snap catches.
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- Drip tray The Alfa Laval drip tray insulates the heat exchanger from the floor, and it also collects any condensate formed on the outside of the heat exchanger. The drip tray also collects any remaining water (after drainage) in the PHE when the unit is opened for inspection or maintenance. The drip tray consists of 0.75 mm hot galvanized steel plates, 50 mm polyurethane foam, supports of waterproof wood, and a draining valve.
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- Protection sheet A protection sheet is a device covering all sides of the plate pack except downwards. It is used to prevent persons from getting injured if a sudden leak of hot, corrosive or toxic media should occur. The Alfa Laval protection sheet consists of one or more aluminium or stainless steel (AISI 304) sheet(s) formed to fit the PHE. On most frames the sheet is fitted between the plate pack and the tightening bolts.
