Resistance heating tube, useful as an U-shaped heating element for heating equipment and machines exposed to extreme weather, has a cable passage element with a vapor equalization space communicating with the tube interior

摘要

A tubular resistance heating body (1) has a lead passage element (6) with a vapor equalization space (9) communicating with the tube interior. A tubular resistance heating body has a heating resistor (3) which extends coaxially through an insulation-filled sealed casing tube (2) and which has a lead passing through a passage element hermetically sealed on the tube end, the passage element (6) having a vapor equalization space (9) communicating with the casing tube interior. Preferred Features: The passage element has a cup-shaped plastic housing (7) filled with insulating oxide granules (5).