A look to see if there is open, cover pressure protection device. The opening and closing cover pressure protection device is usually located at the place where the handle and the lid are combined. There are two functions: First, when the lid is not fully engaged, the pressure is not raised because the lid has a low fastening strength. If the pressure is increased by heating, the pressure cooker may be exploded. The second is that when the pressure in the pot does not drop to a safe pressure, it is ensured that the user does not carelessly open the lid.
Pull on the two, gently pull the sealant ring by hand, and observe whether it can be automatically restored. The rubber ring with poor elasticity, usually its material does not meet the national standard requirements, and the service life is very short. In addition, the pressure cooker manufacturer's trademark (or name) and specifications should be on the seal ring.
Three tests, try with your fingers, can touch the lower handle fastening screws. If it can be touched, the pot will be pressed under the pressure in the pot, and the handle may touch the handle fastening screw, resulting in burns and more serious injuries.
Four checks to see if there is a pressure relief device. The pressure relief device is a new safety measure for pressure cookers. Qualified devices can effectively prevent the boiler from overpressure due to overpressure.
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