Cap Sterilization
Cap Sterilization Unit for Hot-Fill Packaging Applications
The Carleton Helical Technologies (CHT) Cap Sterilization Unit is an advanced container handling solution designed for hot-fill packaging operations. Utilizing precision-engineered container inverting technology, the system rotates filled containers to allow the heated product inside to contact and soak the cap and closure seal.
This process helps sterilize and pasteurize container caps by using the product’s residual heat to eliminate bacteria, microorganisms, and potential contaminants on the closure surface. Cap sterilization is a critical step in many food, beverage, nutraceutical, and liquid packaging applications where product safety, shelf life, and quality assurance are essential.
CHT’s compact cap sterilization system uses specialized twist block technology to achieve reliable container inversion while maintaining smooth product flow and high-speed line efficiency. Compared to traditional cap sterilization and inversion systems, the CHT solution offers a significantly smaller footprint, making it ideal for facilities seeking to maximize production space without sacrificing performance.
Key Benefits
- Effective cap sterilization using hot-fill product temperatures
- Improved food and beverage safety compliance
- Compact footprint for easy integration into existing packaging lines
- Reliable container inversion and handling
- Reduced contamination risks
- Supports high-speed packaging and bottling operations
- Custom-engineered to meet specific production requirements
As part of Carleton Helical Technologies’ comprehensive portfolio of container handling equipment, the Cap Sterilization Unit helps manufacturers improve product quality, enhance packaging line efficiency, and maintain consistent operational performance.

Here are three ways to utilized Invertors for cap sterilization:
Dual Invertors
The first Invertor moves the containers over 180 degrees, releases it to the production line for a given length of time, then another Invertor turns it 180 degrees to the upright position for downstream processing.
Momentary Contact
Using one Invertor to rotate your product 120 degrees, which quickly soaks the cap in hot fluid and sets it upright to proceed down the production line.
All-In-One Unit
This system is for containers that need a full 360 degree turn in a small footprint for cap sterilization.
These inverting solutions are specifically designed for the use of Cap Sterilization and are outfitted with heat dissipation gaps to aid with leaks, airflow and visual inspection. Our Invertors can be manufactured with changeover hardware for removal and cleaning processes.


