The rotary retorts are used to turn the cans or other containers during sterilization and cooling. The purpose is to move the food contents in order to accelerate the heat transfer inside the can, improve the quality and prevent any possible negative effect associated to the static heating processes.
Surdry rotary retorts feature a robust design modeled by FEM analysis. The baskets or stacks of trays are clamped individually to ensure that the load is well supported with no damage to the containers or baskets and trays. The clamping mechanisms as well as other moving parts like rotor shaft or supporting rollers (trunnions) are designed for heavy duty and long life. Many years of experience are true evidence of this fact.
Rigid packs, like cans, jars or bottles, are loaded in baskets with a perforated divider pad between the layers of packs. The layer dividers are perforated sheets made of plastic or other materials.
Flexible packs made of plastic or aluminum films, like pouches, thermoformed trays and bowls would not resist the weight of the layers above so they can only be loaded in individual layers on individual retort trays.
The rotary retorts can also be used in oscillating mode for use with pouches and similar shape containers to reduce the cost of complex trays for full rotation.
Rotary retorts are available in vessel diameters of 1400 mm and 1700 mm and up to 5 basket capacity. The static retort 1400 and the rotary retort 1700 use the same basket size.
Rotary retort models are identified according with a name original from Surdry with AR-1XY format where the:
- AR: Stands for Rotary Autoclave (Retort)
- 1X: Stands for the vessel diameter in decimeters.
- Y: Stands for the number of basket capacity.
- E.g. AR-174 stands for the static retort with 1700 mm vessel and 5 basket capacity.