The sheath electric heater is connected to the oil tank container body via a flange.
The sheath electric heater (also known as sheath-type tubular electric heater or immersion electric heater) is an industrial heating device specifically designed for heating hydraulic oil, lubricating oil, thermal oil, and various liquids or gases.
Its core design highlight lies in the "core-sheath separation" structure. The heating core and the external sheath are independent of each other and are connected to the oil tank or container via a flange. This design allows for maintenance or replacement without draining the liquid in the tank; only the internal heating core needs to be extracted for replacement, greatly improving the efficiency and safety of industrial maintenance.
Below is a detailed introduction to the core principles, technical features, and parameters of the sheath electric heater:
⚡ Core Working Principle
Joule heating effect and heat conduction: Its internal core is a tubular electric heating element that generates heat through the Joule heating effect when current passes through high-resistance alloy resistance wires (such as nickel-chromium alloy).
Efficient heat transfer and anti-carbonization: The generated heat is conducted to the outer wall of the sheath through the insulating thermal conductive medium (usually crystalline magnesium oxide powder) tightly filled inside the metal sheath tube, and then the sheath uniformly transfers the heat to the liquid or gas flowing through. Due to the large contact area between the sheath and the heated medium and the low surface heating power, it can effectively prevent the oil from carbonizing or coking due to local high temperatures.
