There are many electric heat tracing specifications and models, some are universal models, and some are electric heat tracing models compiled by manufacturers themselves according to the company's products and enterprise characteristics. Let's take self-limiting temperature electric heat tracing as an example to introduce the model of electric heat tracing.
Self-limiting temperature electric heat trace is divided into low temperature and medium temperature electric heat trace, among which low temperature self-limiting temperature electric trace can be divided into DXW/DWL-J (low temperature basic type), DXW/DWL-P (low temperature explosion-proof type), DXW/DWL-P/J (low temperature explosion-proof reinforced type), DXW/DWL-PF (low temperature explosion-proof and anti-corrosion type).
The above are some general models of electric heat tracing, and there are also models written by manufacturers according to their own product characteristics. For example, our company's electric heat trace models: BDDBR-P, BDDBR-PF, BDDBR-P/J and so on.
This is identified from the model, and we can also identify from the electric heating product itself, mainly observing these aspects.
1. The width of the electric heating product
Generally, the width of the low-temperature basic type is 11mm, the explosion-proof type is 12mm, and the explosion-proof reinforcement and explosion-proof corrosion type are about 14mm, of course, you can also customize.
Pipe insulation electric heat tracing specifications and models
2. Wire specifications of electric heat tracing
Specifications of electric heat tracing product wires: such as 2×7×0.43, 2×7×0.5, 2 is two strands, 7 is the number of roots, 0.43 and 0.5 are single diameters. The material used in the conductive wire core is tinned copper wire, that is, parallel two conductive wire cores. Usually 7 / share, the better is 19 / share, but the cost of 19 / share is higher. The actual production can be customized according to the specific needs of customers.
3. Analysis from the structure of electric heat tracing products
We also take the low-temperature self-limiting temperature electric cable as an example, the basic electric cable structure has 3 layers: core PTC resistance layer and inner sheath; The explosion-proof type adds a shielding layer on the basis of the basic type; Explosion-proof protection is based on explosion-proof plus protective polyolefin outer sheath, which has higher mechanical strength; Explosion-proof anti-corrosion type adds anti-corrosion outer sheath on the basis of explosion-proof type, which plays the role of anti-corrosion and enhanced protection.
4. Working voltage
Domestic commonly used is 220, 380V and 12V, 24V safety low voltage, other specifications need to be customized.