Explosion-proof heat resistance

• 

Product overview Explosion-proof type thermal resistor as temperature measurement and control of se…

Product overview

Explosion-proof type thermal resistor as temperature measurement and control of sensor and display instrument, with direct measurement and control in the process of production of gas, liquid and steam temperature.My company production of chemical special explosion-proof explosion-proof type, explosion-proof type thermocouple thermal resistor products performance promulgated by the state of "explosive environment with explosion-proof electrical equipment" standard, design and manufacture of thermoelectric properties in line with the international IEC standards, and approved by national instruments explosion-proof safety surveillance testing qualified. Explosion-proof thermocouple, explosion-proof type heat resistance of the structure, principle and assembly methods are basically the same, the main difference is the flame-proof products on the junction box (shell) in the design of high strength aluminum alloy die casting, and have enough internal space, thickness and mechanical strength, thermal stability of the rubber sealing ring are in line with the state explosion proof standard.So when explosive mixed gas explosion inside the box, it won't destroy junction box, and the resulting heat cannot spread outward, explosive. As long as the user strictly abide by the regulations regarding the use of the products, explosion-proof heat resistance products can achieve reliable explosion-proof effect.

Features:
Compression spring type thermal components, ant-vibration performance is good.
High measuring accuracy;
Without compensation conductor, saves the cost;
Imported film resistance element, reliable, stable performance.

Working principle:
Explosion-proof explosion-proof principle is to use the clearance thermal resistor, the design has enough strength of the junction box, and other components, all can produce sparks, arc and dangerous parts are sealed in the junction box cavity temperature, when the explosion cavity, can remove from heat and cooling by joint clearance, made after the explosion flame temperature and not reach outside the cavity, flame-proof thereby.

The main technical parameters:

Product standards
IEC751 JB/T18622-1997 JB/T8623-1997 JB/T5518-91

The normal temperature insulation resistance
Explosion-proof type thermal resistance at ambient temperature for 15-35 ° C, relative humidity is not more than 80%, test voltage for 10-100 - v (dc) holds the insulation resistance between electrodes and outer casing 100 m Ω.

Measuring range and tolerance

Types of naming

Selection guidelines

1) type
2) dividing,
3) explosion-proof grade
4) precision grade
5) installation fixed form
6) protection tube material
7) length or insert depth
Example A: explosion-proof heat resistance, Pt100 type, fixed screw M27 x 2, explosion-proof grade d Ⅱ BT4, protection tube, 316 insertion depth of 300 mm.Models of WZP - 240, Pt100, d Ⅱ BT4, threaded M27 x 2, protection tube, 316 L = 450 x 300 mm.