Explosion-proof sealing rings are sealing components used in environments with potential explosive hazards, which can isolate the path of explosion propagation and prevent the expansion of explosion accidents. Here is a detailed introduction:

Functional Features
Sealed explosion-proof: It not only prevents gas and liquid leakage, but also can withstand the pressure and flames generated by an explosion inside the equipment, preventing the spread of the explosion to the outside and avoiding the ignition of the surrounding flammable gas environment.
Maintain internal environment stability: Prevent harmful substances such as moisture and dust inside the equipment from leaking out, maintain the cleanliness and stability of the internal environment, and extend the service life of the equipment.
Material types
Rubber types: Common ones include nitrile rubber (NBR), fluorine rubber (FKM), perfluoroether rubber (FFKM), etc. NBR has good oil resistance, FKM has good temperature resistance and chemical resistance, and FFKM has extremely excellent temperature resistance and chemical resistance, but it is expensive.
Metal types: Such as 316L stainless steel, Hastelloy alloy, etc., which have zero penetration, high-temperature resistance, non-flammability, etc., but the cost is high and requires precise processing.
Others: There are also graphite-metal composite materials, etc., suitable for high-temperature gas environments, with self-lubrication, high-temperature resistance, etc.

Structural Design
Double-sealing structure: If a metal O-ring is used as the main seal and a spring-loaded PTFE seal is used as the secondary seal, a double barrier is formed, enhancing the sealing reliability.
Fireproof design: Some sealing rings are equipped with corrugated tube seals on the valve stems. In case of fire, the metal corrugated tubes will melt and self-lock, preventing the leakage of flames and gases.Electrostatic discharge prevention design: By adding conductive fillers such as carbon black and metal powder, the resistance of the sealing rings is made less than 10⁵Ω, preventing the accumulation of static electricity and the resulting explosion.

Application fields
Mining and Energy: This includes gas extraction pumps, ventilators, explosion-proof switches, etc. in underground coal mines, as well as equipment interfaces such as wellhead devices and mud pumps on oil and gas drilling platforms.
Petrochemicals: In refining, chemical processing, and natural gas treatment facilities, explosion-proof junction boxes, explosion-proof motors, valves, pump bodies, etc., and explosion-proof electrical interfaces in oil depots and gas stations are all required to use explosion-proof sealing rings.
Pharmaceuticals and Fine Chemicals: Used for sealing equipment that uses organic solvents such as reaction tanks, dryers, centrifuges, etc.
Dust Explosion Hazardous Locations: Such as electrical junction boxes, distribution boxes, dust collectors' interfaces in flour mills, wood processing factories, and metal powder workshops.