The principle of foam fire extinguisher is very simple, that is, when using foam fire extinguisher, a large amount of carbon dioxide can be sprayed. There are two containers in the foam extinguisher, one with aluminum sulfate and the other with sodium bicarbonate solution. The two containers are separated, so the two chemicals will not contact each other and no chemical reaction will occur. When using a foam extinguisher, an inverted extinguisher causes the two solutions to come into contact and mix, creating a chemical reaction that produces large amounts of carbon dioxide. Below, we look at the next, foam fire extinguishing agent manufacturers to introduce foam fire extinguishing agent filling method and principle.

1. The foam fire extinguishing device should be installed horizontally on the tank wall. The dust cover should be installed upward, not side-mounted. When the floating roof tank is used, it should be installed on the foam deflector on the top of the floating roof tank.

2. When installing fire fighting equipment, holes should be opened in the tank wall. There should be enough space above the water tank. The inlet of the production port should be higher than the liquid level of the storage tank, so as not to affect the quality and formation of the foam and prevent the liquid from flowing out of the production port.

3. If a water-soluble liquid is used to extinguish the fire, it is not suitable for the deflector and should be replaced with another suitable buffer device, such as chute, foam tank, etc.).

4, the producer's nozzle should not be blocked by debris. Before installing the foam fire extinguishing device, the pipeline should be cleaned to ensure that there is no debris in the pipeline, and then the foam fire extinguishing device should be installed to adjust the foam system.

5. When using a foam fire extinguisher, do not align the cover and bottom of the fire extinguisher with the human body to prevent the cover and bottom from popping out. Do not spray water at the same time, so as not to affect the fire extinguishing effect. When extinguishing fire, the power supply should be cut off first to avoid electric shock.

Foam extinguishing agent manufacturers should adhere to the principle of foam tank filling is that in the filling process, the capsule should avoid unilateral force. The filling procedure is generally divided into four steps: water injection-leak detection-aeration-liquid filling. Foam tank leak detection refers to applying appropriate water pressure to the interlayer to check whether the capsule is damaged. The main purpose is to ensure that the foam fire extinguisher capsule is in good condition before filling, and to avoid waste caused by filling damaged capsules. If it is to purchase new equipment for the first filling in a short time, because the capsule usually leaves the factory just after the leak test, this step of foam fire fighting equipment can be omitted as appropriate.

Foam tank filling refers to the injection of appropriate volume of nitrogen or air into the capsule under appropriate pressure. Its main function also has two points; the first is to open the capsule with gas to prevent the capsule from bonding locally, which is conducive to the filling of foam liquid. The second is to form a local suspended volume of gas at the top of the capsule. The foam extinguishing agent manufacturer enables the capsule to withstand sufficient buoyancy during the filling process to avoid excessive force on the flange joint of the capsule. Inflation is also a very important step, which should normally be carried out in accordance with the procedure. When the filling conditions are difficult and there is no previous leak detection step, the filling of the foam fire fighting equipment can be omitted.