POSISTOR HEATER OF PARTS OF PIPELINES SYSTEM AND LIQUID AND GAS RESERVOIRS Russian patent published in 2000 - IPC

FIELD: electric heaters; heating agents in systems and separate reservoirs. SUBSTANCE: heater has housing 1 with cover 7 which is heated by means of posistor 2 secured in housing 1 and heat-transfer surface on outside side of bottom of housing 1; device for connection of posistor 2 with feed wire includes contact plate 3, insulator 5 and spring 6 pressing posistor 2 between bottom of housing 1 and plate 3. Housing 1 is secured on member of system, for example on fuel line or on separate reservoir, directly or through spacer. Heater maintains preset temperature with no danger of overheating and breaking of fire in wide range of velocities of inter-tube medium and surrounding temperature without any control devices due to property of posistor 2 abruptly increase its resistance only upon obtaining very narrow temperature field. EFFECT: enhanced efficiency. 5 cl, 5 dwg