EH

The Aalborg EH is an electric heater for booster and auxiliary heating of oil and water, offered in six sizes designated by the numbers 15, 20, 25, 30, 35 and 40 after the letters EH. Capacity values in the range table reach from 5 kW to 121 kW for lube oil, from 7 kW to 171 kW for fuel oil and from 15 kW to 369 kW for water. Surface loads are 1 W/cm2 for lubrication oil, 1.4 W/cm2 for heavy fuel oil and 3 W/cm2 for water. Design pressure is 16 bar, with 15 bar for the EH 40, and design temperature is 160 degrees C. The heater can be installed vertically or horizontally, and flanges are listed as PN 16, JIS-16K and EN1092-1 PN16, with sizes from DN 25 to DN 80.

Power supply terminals accept 110-690 V AC/DC, and the safety thermostat and optional control thermostat sit on the top hood. Net weights run from 55 kg to 565 kg and the element count from 9 to 69, but the sheet calls its dimensions a guideline and offers a drawing on request.

Optional accessories are a safety valve, drain valve, pressure gauge, thermometer and a Pt. 100 sensor. The thermostat described is type TC-E 8/4, an electronic P-controller that works from a PT100 sensor in the heater and can operate up to 8 power relays. When flow varies, the measured temperature changes and the controller switches heating elements in or out. The ordering key lists part no. 60T3006 with 4 steps and IP54, and part no. 56L1030 with 3 to 8 steps and IP56. A mechanical type, part no. 807000019 with 4 steps, covers 20 to 200 degrees C with 3 degrees C hysteresis, while the electronic type, part no. 56L1030, covers 0 to 200 degrees C with 2 degrees C hysteresis.

Źródła: Alfa Laval brochure Aalborg EH, checked 05.10.2026