Industrial explosion-proof thermal resistance is used as the sensor for temperature measurement and control, which is matched with the display instrument to directly measure and control the temperature of gas, liquid and steam in the production process The explosion-proof performance of special explosion-proof thermal resistance products for chemical industry produced by our company shall be in accordance with the & ldquo; Explosion proof electrical equipment for explosive environment & rdquo; Standard design and manufacture, thermoelectric characteristics comply with international IEC standards, and pass the test of national instrument explosion-proof safety supervision station The structure, principle and assembly method of explosion-proof thermocouple and explosion-proof thermal resistance are basically the same
The main difference is that the junction box (shell) of explosion-proof products is designed by high-strength aluminum alloy die casting, and has sufficient internal space, wall thickness and mechanical strength
The thermal stability of rubber sealing ring meets the national explosion-proof standard
Therefore, when the explosive gas mixture inside the junction box explodes, its internal pressure will not damage the junction box, and the resulting heat energy cannot diffuse outward - explosion propagation As long as users strictly abide by the product use rules, explosion-proof thermal resistance products can achieve reliable explosion-proof effect Explosion proof working principle of thermal resistance & The explosion-proof thermal resistance uses the gap explosion-proof principle to design the junction box and other components with sufficient strength to seal all parts that will produce sparks, arcs and dangerous temperatures in the junction box cavity
When an explosion occurs in the cavity, it can extinguish and cool through the gap of the joint surface, so that the flame and temperature after explosion cannot be transmitted outside the cavity, so as to carry out explosion-proof
Characteristics of explosion-proof thermal resistance
spring loaded temperature sensing element with good vibration resistance; |
high measurement accuracy; |
there is no need to compensate the conductor to save costs; |
imported thin-film resistance elements have reliable and stable performance |
main technical parameters of explosion-proof thermal resistance
Product executive standard: iec751 , JB/T18622-1997 JB/T8623-1997 JB/T5518-91
Explosion proof grade: ExdIIBT4 ~ BT6 exdiict4 ~ CT6
Normal temperature insulation resistance
Explosion proof thermal resistance at ambient temperature of 15 ~ 35 DEG; C
The relative humidity is not more than 80%, and the test voltage is 10-100v (DC)
The insulation resistance between the electrode and the outer sleeve & gt; 100MΩ。
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