The shell of the anti-explosion solenoid valve can withstand the flammable mixture that penetrates into the shell through any joint surface or structural gap of the shell to explode inside without being damaged, and will not cause an external explosive environment formed by one or more gases or vapors. Burn, put all the parts that may generate sparks, arcs and dangerous temperatures from the ultra-high pressure solenoid valve into the explosion-proof enclosure, and isolate the internal space of the device from the surrounding environment. Due to the breathing of electrical equipment and the infiltration of gas, there are gaps in the explosion-proof box, so that explosive gas mixtures may exist inside.
Common types of explosion-proof solenoid valves:
1. Increased safety type: There will be no arcs, sparks and dangerous low temperatures during normal operation, and the structure is more refined, which further improves the stability and stability of the equipment;
2. Explosion-proof type: When the setting device is in normal operation, the parts that may generate spark arcs are placed in the explosion-proof box. The explosion-proof box can withstand the external explosion pressure without being damaged, and when the external flame gas passes through the gap When transmitting, the energy can be reduced, and the transmission solenoid valve can isolate and avoid the gas outside the explosion-proof box.
3. Intrinsically safe type: When an external circuit is installed in a fixed device, neither the electric spark nor the thermal effect generated under normal conditions or fixed fault conditions can extinguish explosive contaminants.
4. Positive pressure method: insist that the external maintenance gas pressure is higher than the surrounding pressure to prevent explosive mixtures from entering the shell or make the external maintenance gas whose concentration is lower than the upper explosion limit pass through the shell.
5. Pouring seal type: Pouring seal will produce arcs, sparks or high temperature parts that ignite the explosive mixture, making it impossible to ignite the surrounding explosive mixture.