Parallel retorts double boiler operating instructions General cannery for canned boiled for pressure are present in the form of horizontal retorts pasteurization treatment, this device can be achieved through the introduction of compressed air back-pressure sterilization. Cooling demand in the pot were required to pump into the pot with the top of the water pipe (or the use of water system). During sterilization, since the heating temperature so that the can, the pressure within the can to exceed outside the tank (in the pot) pressure. Therefore, in order to avoid internal Bolipingguan supercharger cover sterilization and jump on the tin cans protruding end surfaces, must be applied to the anti-pressure, especially the need for high temperature sterilization of canned meat and more on the case. Use of anti-pressure sterilization, i.e. with increased pressure of compressed air introduced into the pot, and the pot to prevent the can jump convex cover, its operating conditions are as follows: Since the compressed air is a poor conductor of heat, steam condition itself has a certain pressure. Therefore, when the temperature in the sterilization process, do not put compressed air, but only when the sterilization temperature is reached after holding only open air into the pot, so the pot to increase from 0.5 to 0.8 atm. Especially after sterilization, when the cooling cooling, stop the supply of steam, the cooling water into the sprinkler pipe. Since the pot temperature drops, condensation of steam, leaving the pot to reduce the use of compressed air pressure force compensated. In the sterilization process, should pay attention to the original exhaust, then vent the steam, the steam circulation. Also deflated once every 15-20 minutes, to promote heat exchange. In short sterilization must meet the specified conditions, according to certain procedures, specific provisions sterilization temperature level, the size of the pressure sterilization, sterilization duration and method of operation, such as canned goods by the sterilization process.