AKLT-PG-D Explosion proof Electric Contact Pressure Gauge

1、 Overview:
The explosion-proof shell of the explosion-proof electric contact pressure gauge has good explosion-proof performance. Therefore, the explosion-proof electric contact pressure gauge can withstand the explosive pressure generated by the explosive gas mixture inside the shell in the event of an explosion due to the influence of sparks or arcs during normal operation, and can effectively prevent the heat energy generated from this from propagating smoothly outward. It can only slowly diffuse outward along the small gaps in the explosion-proof joint surface inside the shell. At this point, the instantaneous temperature transmitted to the outside of the shell has dropped below the ignition temperature of the explosive gas mixture, so it will not cause detonation.
The working principle of explosion-proof electric contact pressure gauge is based on the detection element(Spring tube in measurement system)The elastic deformation of the electrical contact group is driven by mechanical transmission to produce corresponding actions of the contacts in the electrical contact group(Close or open)To enable the circuit in the voltage control system to be connected or disconnected, thereby achieving the purpose of automatic control alarm and on-site indication.
The explosion-proof category of the explosion-proof electric contact pressure gauge is Class II explosion-proof type B level T4 group, with the symbol Exd Ⅱ BT4.
Explosion proof electric contact pressure gauges are suitable for measuring the pressure of non crystalline, non solidified explosive mixtures or various non explosive media in places with explosive hazards.

2、 Structural principle:
The explosion-proof electric contact pressure gauge consists of an explosion-proof shell, a measuring system, an electric contact group, a regulating device, and an outlet box.

3、 Main technical indicators:
Accuracy level: 1.5
Scale range: 0-0.16; 0~0.25； 0～0.4； 0～0.6； 0～1； 0～1.6； 0~2.5； 0～4； 0～6； 0～10； 0～16； 0～25； 0～40； 0~60； -0.1～0.06； -0.1～0.15； -0.1～0.3； -0.1～0.5； -0.1~0.9； -0.1～1.5； -0.1～2.4MPa
Control mode: upper and lower limit slow contact switch
Maximum operating voltage: DC 220V or AC 380V;
Contact power: 10VA
Working position: Vertical installation
Environmental conditions for use: -10~50 ℃, relative humidity not exceeding 80%, and explosive mixtures should belong to Class IIB T4 or below. The working vibration and rapid pulsation of the measured medium should not affect the reliable operation of the instrument contacts.
Temperature effect: The displayed value should not exceed 0.4%/10 ℃, and the set point should not exceed 0.6%/10 ℃ (with a temperature deviation of 20 ± 5 ℃).
Insulation strength: 50Hz sine AC 2000V for one minute
Weight: 6kg

4、 Explosion proof joint surface type and its basic parameter technical data:

Note: An example of the effective length and gap width of the explosion-proof joint surface can be found in the schematic diagram of the explosion-proof shell structure.

5、 Explosion proof shell and pressure system components and materials:

Note: The material of the observation window of the explosion-proof electric contact pressure gauge shall have an impact resistance strength of not less than4JOnce the observation window is damaged, it cannot be used.