Requirements for sealing materials for heating tubes

Basic requirements for sealing materials for heating pipes:

The basic requirements of sealing materials for heating tubes are as follows: 

1. The material itself has high density insulation performance and electrical strength;

2, with good water tightness and air tightness, and the sealing performance is best elastic;

3, with the lead rod and metal shell has similar electric expansion coefficient;

4, has high heat resistance;

5, itself very low hygroscopicity;

6, at the working temperature, long-term work will not age;

7, wide source of materials, low cost;

8, the process is simple, easy to operate, can be suitable for mass production or flow production.

The characteristics of the sealing material of the electric heating tube ensure the insulation of the electric heating tube, the long-term work does not aging to ensure the service life, and its extensive mass production reduces the manufacturing cost, and the high heat resistance and expansion coefficient make the electric heating tube not melt or affect the viscosity due to overheating. When the electric heat pipe is manufactured, the suitable sealing material is selected according to its purpose, that is, what medium is heated, the working temperature of the end, the relative humidity of the environment and the direction of the external mechanical force and the element mouth.