No. Foam extinguishers can be used to put out fires involving valuables and instruments.
Foam fire extinguishers are suitable for fighting general fires, such as oil products, grease and other fires that can't be fought with water. Can not extinguish water-soluble flammable, flammable liquid fire, such as alcohol, ester, ether, ketone and other substances fire, can not be used to extinguish the fire of electrically powered equipment.
Carbon dioxide fire extinguishers can be used to extinguish books, files, valuable equipment, precision instruments, 600 volts of electrical equipment and oil in the initial fire. Suitable for fighting general such as oil products, grease and other fires, but can not fight water-soluble flammable, flammable liquids, such as alcohols, esters, ethers, ketones and other material fires, can not fight electrically charged equipment and class C and class D fires.
Extended information:
Portable foam extinguishers use:
Use of the handheld or shoulder to quickly run to the scene of the fire, in the distance from the burning material about 6 meters.
When using the portable foam extinguisher, you can quickly run to the fire scene with your hand or shoulder at a distance of about 6 meters from the burning object, pull out the safety pin, hold the opening lever with one hand, and hold the lance with the other hand;
Forcibly pinch the opening lever to open the sealing or puncture the sealing piece of the gas cylinder, and the air foam can be sprayed from the mouth of the lance. Fire extinguishing method is the same as the portable chemical foam fire extinguisher.
But the air foam fire extinguisher use, should always keep the fire extinguisher upright, do not turn upside down or horizontal use, otherwise it will interrupt the spray. At the same time, you should always hold on to the opening pressure handle, can not be released, otherwise it will also interrupt the spray.
People's Daily Online - Mastering the use of fire extinguishers is crucial to extinguishing an incipient fire
Baidu Encyclopedia - Foam Fire Extinguishers