High and low temperature box manufacturers often involve explosion-proof problems, because in some special working environments and some special-purpose high and low temperature box manufacturers need to have an explosion-proof function. For example, the electrical, instrumentation equipment, cable trunking, cable trench, explosion-proof instrument panel (box) using positive pressure ventilation in explosion-endangered areas should have explosion-proof functions. What are the common explosion-proof types of high and low temperature box manufacturers?
1. Explosion-proof type "d" explosion-proof type refers to the parts that may generate sparks, arcs and dangerous temperatures placed in the flameproof enclosure. The internal space of the device is separated from the surrounding environment through the flameproof enclosure.
2. The increased safety "e" explosion-proof type refers to taking some additional measures to make electrical equipment that will not generate arcs or sparks under normal operating conditions safer.
3. The positive pressure type "p" explosion-proof type is to maintain the pressure of the protective gas inside the equipment shell higher than the surrounding explosive environment pressure, so as to achieve the purpose of safety.
4. The intrinsically safe "i" explosion-proof type is an intrinsically safe circuit in which all circuits inside the equipment are not ignited by the specified explosive gas environment under the conditions specified in the standard, any sparks or any thermal effects generated.
5. The oil-immersed "o" explosion-proof type is to immerse the entire equipment or parts of the equipment in the oil (protective fluid) so that it cannot point to the explosive gas environment above the fuel surface or outside the casing.
6. The sand-filled "q" explosion-proof type is a kind of powder material filled with sand or other specified characteristics in the shell, so that under the specified conditions of use, the arc or high temperature generated in the shell cannot ignite the surrounding explosive gas environment. Equipment protection type.
7. Pouring type "m" explosion-proof type is to encapsulate electrical parts that may cause sparks, arcs or hazardous temperature parts of explosive mixture explosion, so that it cannot ignite the surrounding explosive mixture.
8. Dust explosion-proof electrical equipment is to limit the maximum surface temperature of the shell and use a "dust-tight" or "dust-proof" shell to limit the entry of dust to prevent the ignition of combustible dust.
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