When designing a cartridge heate for a customer, according to the power requirements, the size specification or the power calculation according to the size specification, there are two schemes that are similar to the imported cartridge heater and the ordinary cartridge heater. The imitation import cost is higher than that of the ordinary cartridge heater, and the power per unit length is higher, which is 1-2 times that of the ordinary heating element. The specific differences between the two are as follows:
1. What is the difference between an imitation imported cartridge heater and an ordinary cartridge heater?
We can judge the difference between the two in the following aspects.
1. From the internal structure:
(1) The ordinary electric heating tube is surrounded by the electric heating wire in the magnesium oxide powder.
(2) Imitation imported cartridge heater is a kind of electric heating wire wound around the high-temperature magnesium rod to make the gap between the heating body and the outer casing tightly filled with magnesium oxide powder.
2, surface load:
(1) Ordinary cartridge heater: 1-4w/cm2,
(2) Imitation imported cartridge heater: 1-8w/cm2.
3, tube material:
(1) Ordinary cartridge heater: domestic steel,
(2) Imitation imported cartridge heater shell has domestic and imported materials,
The power design of the cartridge heater is related to the heating medium. There is power requirement, and the length can be calculated by the common surface load:
Taking the tube diameter Φ12mm as an example, calculate how long the cartridge heater is at 400w power (non-over standard design)
1, water heating, length 132mm,
2, oil heating, length 265mm,
Viscous oil, length 1060mm
3, mold heating, ordinary length: 265mm, imitation import length 132mm
4, air dry heating, air still, length 400mm
Blower blower, length 200mm