Product Name: WR series flameproof thermocouple / thermal resistance WR series flameproof thermocouple / thermal resistance
Product No.: 141538-108
Product model: 0
Updated on: June 14, 2009
Manufacturer: thermo couple -- Shanghai Feilong instrument & Electrical Co., Ltd
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Product details
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WR series flameproof thermocouple
The industrial flame-proof thermocouple is a kind of temperature sensor, which is widely used in the automatic control system of chemical industry. Through the temperature sensor, the temperature parameters of the controlled object can be changed into electrical signals, which can be transmitted to the display, recording and regulating instruments to detect, regulate and control the system.
In the chemical plant, the production site is often accompanied by a variety of flammable, explosive and other chemical gases, steam, if the use of ordinary thermocouples is very unsafe, it is very easy to cause environmental gas explosion. Therefore, the flame-proof thermocouple must be used as the temperature sensor in these occasions. The flame-proof thermocouple products produced by our factory are suitable for the places with explosive gas risk in the temperature range of dllbt4 and dillcn-6.
The technical performance of the flame-proof thermocouple produced by our company conforms to the technical conditions of zbnll002-87 industrial thermocouple, the graduation table of zby300-85 industrial thermocouple and the allowable errors. Meanwhile, the products all conform to the general requirements of explosion-proof electrical equipment for explosive atmospheres gb3836.1-83 and gb3836.2-83 standards. The national instrument explosion-proof safety supervision and inspection station advances the drawings, technical documents and prototypes of the products Conduct special examination and approval, and issue explosion-proof certificate.
At present, the company produces two kinds of industrial flame-proof thermocouples: nickel chromium nickel silicon (K type) and nickel chromium copper nickel (giant).
Thermal response time
In case of step change of temperature, the time required for thermocouple output to change to 50% of the step change is called thermal response time, which is expressed by t0.5.
Nominal pressure
Generally, it refers to the static external pressure that the protection pipe can bear without breaking under normal temperature, and the test pressure is generally 1.5 times of the nominal pressure. In fact, the allowable working pressure is not only related to the protection material, diameter and wall thickness, but also related to its structure, installation method and insertion depth
As well as the measured medium flow rate and type.
Explosion proof type and class group
Explosion proof group: dllbt4 dllct-6
Enclosure protection grade: IP65 (gb4208 standard)
Principle and structure
The structure and principle of explosion-proof thermocouple and assembly thermocouple are basically the same. The difference is that the junction box (shell) of explosion-proof products is designed with explosion-proof special structure, and the junction box is made of high-strength aluminum alloy die-casting, and has enough internal space, wall thickness and mechanical strength. The thermal stability of rubber sealing ring meets the national explosion-proof standard. Therefore, when the inside of junction box is In case of explosion, the internal pressure of the mixed gas will not damage the junction box, and the resulting heat energy cannot be diffused outwards to transmit explosion.
Due to the above special structure of anti explosion, the product fully conforms to the use in the dllbt4 ~ dllct6 explosion-proof category. As long as the user strictly abides by the product use rules, the product can achieve reliable explosion-proof effect.
