Describes the purpose and classification of explosion-proof solenoid valve introduced
May 25 21:08:41, 2023
Explosion-proof solenoid valve shell on the gas explosion energy transfer has obvious retardation, in addition to the explosion-proof solenoid valve coil shell has to withstand the pressure of gas explosion, so explosion-proof solenoid valve safety performance is high. Explosion-proof solenoid valve is mainly suitable for transmission of flammable and explosive media or dedicated to explosive hazardous locations, but because of the different environments and different levels of explosion-proof, explosion-proof solenoid valve is also divided into different types. 1. Intrinsically safe type: the circuit inside the equipment under specified conditions, normal work or the provisions of the fault condition of the spark and heat effects are not able to ignite the explosive mixture. 2. Explosion-proof type: When the equipment is in normal operation, the components capable of generating spark arc are placed in the flameproof enclosure, the explosion-proof enclosure can withstand the internal explosion pressure without being damaged, and the flame gas inside can be guaranteed to propagate through the gap , Lower energy, not enough to detonate the gas outside the shell. 3. Positive pressure type: Maintain the pressure of the internal shielding gas above the ambient pressure to prevent the explosive mixture from entering the housing or enough shielding gas to pass through the housing to reduce the concentration of the internal explosive mixture below the lower explosive limit. 4. Increased safety: In normal operation will not produce arcing, sparks and dangerous high temperature, the structure to take further protective measures to improve the safety and reliability of the equipment. 5. Encapsulation: It will partially arc-seal, spark or heat-ignite parts that may ignite the explosive mixture so that it does not ignite the surrounding explosive mixture. These types of explosion-proof solenoid valve in a different environment to greatly enhance the environmental safety factor.