There is equipment that connects from the gas tank to the fire extinguisher, and is deigned to keep from overpressurizing the extinguisher. Do NOT try this without the equipment.
Nitrogen can be used in fire extinguishers as gas propellant.
N2, you know nitrogen gas
it depends how big the fire is
To pressurize a Sears dry chemical fire extinguisher model 958044, first ensure that the extinguisher is fully charged and that the safety pin is in place. Locate the pressure gauge on the extinguisher; it should be in the green zone. If the pressure is low, use a compatible air compressor or nitrogen tank to refill the extinguisher by connecting it to the fill valve. Always follow the manufacturer’s guidelines and safety procedures when handling fire extinguishers.
Because nitrogen gas bigest quantity in air.
Indefinite. Usually they are tested & certified annually.
A pure CO2 fire extinguisher is recharged by pouring in liquid C02. It usually takes a professional refilling company to determine the proper amount and to pour it in safely. Dry ice, crushed to get it into the extinguisher tank, can also be used.
To fill a fire extinguisher properly, follow these steps: Check the pressure gauge to ensure it is in the green zone. Remove the safety pin and nozzle. Pour the appropriate extinguishing agent into the canister. Reattach the nozzle and safety pin. Shake the extinguisher to mix the contents. Check the pressure gauge again to ensure it is still in the green zone. Remember to always follow the manufacturer's instructions for your specific fire extinguisher.
You can fill a fire extinguisher with any substance you like. Whether it will work as a fire extinguisher afterwards is a different matter. The old pump-style water fire extinguishers in college dormitories have occasionally been found to contain beer (which at least still works for the intended purpose) or gasoline (which is not so effective), which is one reason you don't see that type so much anymore.
how does a fire extinguisher work
A Class C fire extinguisher.
A Class C fire extinguisher.