ELECTRIC DIRECT FLOW BOILER

The boiler can be used in local hot water heating installations. It consists of a compact steel plate cabinet in which a boiler body insulated by heat insulation, an operating and emergency thermostat, signal lamps, electric switches, electric board, water recirculation pump and a safety valve are mounted. The boiler body (2) is in the form of hollow parallelepiped divided in height in equal-sized heating chambers (15), each two adjacent chambers having a common partition wall (16) in which a passage hole (17) is made. The holes of every two adjacent heating chambers (15) are on the opposite sides and are alternating in left-and-right. On the front wall (18) of body (2) other passage holes are machined across which replaceable U-shaped tubular electric heaters (19) are mounted. Steel nipples (20) having cylindrical threading are air-tight fitted on both ends of each of them through which two leads (21) of the heater are passed. In each chamber (15) one or two tubular heaters (19) are fitted along its length which are fixed in metal plates (22) having machined orifices. The nipples (20) of each heater (19) and sealing rings (23) are fitted in them, and on their external side the heaters are fixed to plates (22) by means of steel nuts (24). Individually each plate (22) is secured to the front wall (18) of body (2) by studs (25) with nuts (26) and a flat sealing (27). Pairs of flat partitions (28) with a height equal to the height of each chamber are fitted along the length of each heating chamber (15) to its side walls, symmetrically and at even distances from each other.\!