1. What is the working principle of self-limiting temperature electric heat tracing?
Working principle Electric heat trace consists of nano conductive carbon particles and two parallel bus bars plus an insulating layer, due to this parallel structure, all self-limiting temperature tracing wires can be cut to any length in the field, connected by a two-way or three-way junction box.
In each trace wire, the number of circuits between the bus bars varies with the influence of temperature, and when the temperature around the cable cools, the conductive plastic produces a contraction of micromolecules so that the carbon particles are connected to form a circuit, and the current passes through these circuits, causing the cable to heat up. When the temperature rises, the conductive plastic produces the expansion of micromolecules, and the carbon particles gradually separate, causing the circuit to be interrupted, the resistance to rise, and the cable will automatically reduce the power output.
When the temperature becomes cold, the plastic returns to the state of micromolecular contraction, the carbon particles are connected accordingly to form a circuit, and the heat trace heating power automatically rises. Self-limiting heat tracing has the benefit that other heat tracing devices do not have, it controls the temperature not too high or too low, because the temperature is automatically adjusted.
2. What is the specification for electric heating of pipes
The electric heating system is composed of HGLX-J3/PF-3 electric heat tracing, GRPDX distribution box, FDH-2 type, FJH explosion-proof junction box, heat-resistant pressure-sensitive tape, aluminum foil tape.
It is clearly stipulated that the electric tropics should operate in strict accordance with the IOS9001-2000 quality system, and all products should meet the explosion-proof certification of the shelf explosion-proof identification center. Its standard color is gray, the highest maintenance temperature is 65 °C ~ 105 °C, the maximum withstand temperature is 85 °C ~ 135 °C, and the calorific value of 5 °C ~ 99 °C, 5 °C ~ 149 °C continues to be more than 90%.
The bending radius differs at both room temperatures and 20 at 25°C at room temperature. 4mm, -30°C at low temperature 35.
0mm。 The minimum insulation resistance is 400MΩ.
The minimum construction temperature is -40°C. The distribution box adopts GRPDX standard distribution box for freeze protection, adopts wall-mounted structure, the power cable is inlet at the bottom of the box, and the protection level is IP4.
Inside, it is equipped with air circuit breaker, leakage protector, etc. The rated voltage of the power junction box is AC 200V/380V, and the rated current is 4A.
Pay attention to the deformation, crack or damage found should stop use; Remember the heating wire when installing, and the short circuit between the copper wire and the core wire is braided; Unused wire inlet holes should be plugged with the attached steel plate. Pipe Electric Heat Tracing Quote: There are various types of pipe electric heating on the market, so the price points are also different.
There are 5 yuan to 30 yuan per meter, but most prices are around 10 yuan to 20 yuan per meter.
