Equipment for local and volumetric PWHT (heat treatment of welded joints)
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Finger heaters

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Description

Finger heaters (FHs) have been widely used in the past for pre- and post welding heat treatment when using high-power welding transformers operating on direct or alternating current. They require minimal service and are able to withstand careless handling.

Heaters consist of two 3.6 mm hard nichrome wires, threaded through aluminum oxide beads, providing electrical insulation combined with high thermal conductivity. Standard finger heater is designed for a current of 120A and a maximum temperature of 1050°C. Heat treatment of stainless steel requires a special high-temperature wire to reach maximum temperature of 1150°C. Steel connecting blocks are used as pins.

It is possible to manufacture these high-power heaters with three wires.

Order code Pipe diameter, mm Length of the heaters section, mm Finger quantity, pcs. Voltage, V Powewr, kW Add to Cart
110013 108 416 13 20,5 2,05
110016 133 512 16 24,0 2,40
110018 159 576 18 26,3 2,69
110019 168 608 19 27,5 2,73
110022 194 704 22 31,0 3,10
110024 219 768 24 33,0 3,30
110027 245 864 27 36,6 3,62
110029 273 928 29 39,0 3,90
110034 325 1088 34 44,7 4,42
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