Counter Pressure Autoclave

The Counter Pressure Autoclave is a steam or steam-and-water sterilization system for packaged food. It uses controlled internal pressure during heating and cooling to reduce package deformation and support batch processing of vacuum bags, jars, PP cups and other sealed containers.

Target Products: Utilized for packaged food items and thermal sterilization of sealed food products where controlled heating and pressure are required during processing.

Packaged Food Sterilization: The autoclave is intended for heat-processing sealed food packages where sterilization and controlled cooling are required after filling and sealing.

Suitable Package Types: Typical package formats include vacuum bags, glass jars and PP cups. Package material, filling level and sealing method should be confirmed before process validation.

Target Buyers: Suitable for food processors, packaged-food manufacturers, contract food producers and distributors purchasing batch sterilization equipment for small- to medium-scale production.

External Air Support: An external air compressor supplies compressed air to the sterilization system for pressure balancing during the process.
Package Pressure Balance: Counter-pressure processing helps reduce the pressure difference between the chamber environment and the package, which is particularly relevant to flexible or sealed packaging.
Controlled Exhaust: The system includes an automatic-reset overpressure safety valve, solenoid exhaust valve and manual exhaust valve for different exhaust and pressure-control functions.
Steam / Water Process Selection: S-series equipment uses steam, while WB-series equipment uses steam and water. The appropriate process should be selected according to the product and package configuration.

Product Loading: Sealed food packages are loaded into the sterilization baskets with sufficient spacing for process circulation. Loading quantity and arrangement should remain consistent during validation.
Air Removal & Heating: The chamber is heated to the required process temperature while air is removed from the sterilization space.
Sterilization Holding: Products are held at the validated process condition for the required time, based on the product, package size and thermal characteristics.
Cooling & Unloading: Cooling and drainage follow the configured cycle. Products are unloaded after the chamber reaches safe opening conditions.

Product & Package Matching: Buyers should provide product type, package material, package dimensions, fill weight and target sterilization conditions so the appropriate chamber and loading configuration can be evaluated.
Basket Configuration: Basket size and quantity can be assessed according to package dimensions and required batch loading, particularly for products supplied in bags, jars or cups.
Utility Requirements: Electrical configuration differs by model, with listed options including 220 V and 380 V. Steam, water, drainage and compressed-air requirements should be confirmed before installation.
Process Program Setup: Sterilization programs should be established around the product's required temperature, pressure, holding and cooling conditions rather than using one fixed cycle for all products.

Pressure System Inspection: Pressure-bearing components, valves and connections are checked for proper assembly and operating condition.
Control Function Testing: The control panel, temperature control, programmed cycle functions and operating signals are checked before shipment.
Heating & Drainage Testing: Heating operation and the electric drain valve are tested to verify correct response during the equipment cycle.
Final Inspection: The chamber, flange, valves, electrical components, baskets and ordered accessories are checked against the final equipment configuration before packing.