In the production of ready-to-eat meals, pet food, and vacuum-packed cooked foods, "pouch swelling" and "bursting" after high-temperature sterilization are primary challenges affecting yield. For enterprises using flexible packaging like aluminum foil pouches or retort pouches, the sterilization process is a technical game of pressure balance.　

Why Flexible Packaging is Prone to Damage During Sterilization?

　　Vacuum pouches are extremely sensitive to internal and external pressure differences. During the heating phase, residual air and moisture inside the pouch expand. If the pressure inside the autoclave is insufficient to counteract the expansion force, the packaging material will undergo permanent stretching or bursting at the heat seals.

Counter Pressure Solutions by FA-WB150E

　　The FA-WB150E autoclave provides full-process physical protection for flexible packaging through "counter-pressure balance" technology:

1. Auto Air Admission & Precise Constant Pressure

　　The FA-WB150E is equipped with a dedicated air pump and an air admission solenoid valve. When the pressure sensor detects that internal pressure is below the preset threshold (0.15–0.2 MPa), the system automatically introduces compressed air. This "active suppression" ensures that internal pouch pressure remains lower than external support force.

2. Thermal Uniformity in Water Bath Mode

　　The device supports water bath sterilization, where high-temperature water completely submerses the product. Compared to pure steam, water provides more uniform heat transfer and pressure buffering, effectively avoiding uneven expansion caused by local hot spots.