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Another important category is the gas-phase filter, which targets gaseous pollutants such as volatile organic compounds (VOCs), sulfur dioxide (SO₂), and nitrogen oxides (NOₓ). These substances pose significant health risks and contribute to the phenomena of smog and acid rain. Chemical sorbents, such as activated carbon, zeolites, and silica gels, are commonly used in gas-phase filters to adsorb or react with these harmful gases, thus preventing them from entering the atmosphere.


gas filter

gas

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In aerospace operations, decompression equipment is also critical for protecting pilots and passengers from the hazards of high altitudes. As aircraft ascend to cruising altitudes, the air pressure decreases, which can lead to hypoxia – a condition caused by a lack of oxygen in the bloodstream. To prevent this, aircraft are equipped with pressurized cabins that maintain a safe level of air pressure throughout the flight To prevent this, aircraft are equipped with pressurized cabins that maintain a safe level of air pressure throughout the flightdecompression To prevent this, aircraft are equipped with pressurized cabins that maintain a safe level of air pressure throughout the flight To prevent this, aircraft are equipped with pressurized cabins that maintain a safe level of air pressure throughout the flightdecompressiondecompression equipment. In the event of a rapid decompression, such as a breach in the aircraft's hull, decompression masks are available for passengers and crew to quickly access a fresh oxygen supply.

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There are two main types of pressure regulating devices direct-acting and pilot-operated. Direct-acting regulators use the force of the incoming fluid to directly act on the diaphragm or piston, while pilot-operated regulators use a small amount of pressurized air or gas to control the movement of the diaphragm or piston. Pilot-operated regulators are generally more precise and can handle larger pressure drops than direct-acting regulators Pilot-operated regulators are generally more precise and can handle larger pressure drops than direct-acting regulators Pilot-operated regulators are generally more precise and can handle larger pressure drops than direct-acting regulators Pilot-operated regulators are generally more precise and can handle larger pressure drops than direct-acting regulatorspressure regulating device.

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