FC-ZL Explosion proof Electric Contact Pressure Gauge

Structural principle:

FC-ZL Explosion proof Electric Contact Pressure GaugeIt consists of an explosion-proof shell, a measurement system, an electrical contact group, a regulating device, and an outlet box. 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 elastic deformation of the detection element (spring tube in the measurement system), which drives the contacts in the electric contact group to produce corresponding actions (closing or opening) through mechanical transmission, so as to connect or disconnect the circuit in the pressure control system, thereby achieving the purpose of automatic control alarm and on-site indication.

FC-ZL Explosion proof Electric Contact Pressure Gauge 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

Types and basic parameters of explosion-proof joint surfaces

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.

·Explosion proof shell and pressure guiding system components and materials

Note: The material of the observation window of the explosion-proof electric contact pressure gauge has an impact resistance strength of not less than 4J. Once the observation window is damaged, it is not allowed to be used.