Why do chillers with identical specifications and parameters vary drastically in reliability — some operate continuously for years without failure, while others suffer frequent malfunctions? The gap lies not only in design drawings, but more importantly, in process control during production.

FerroTec Thermoelectric embeds quality control into every production process. Automated equipment testing replaces manual inspection, with full data traceability to guarantee consistent and stable performance across batches of chillers. Let’s look at four core production processes for chillers.

1. Copper Tube Straightening & Bending: Eliminating Process Deviations

Refrigerant flows inside copper tubes. The precision of copper tube processing directly impacts welding quality and refrigerant flow smoothness, forming the foundation for long-term stable equipment operation.

Traditional manual tube bending often results in inconsistent radians, inaccurate angles and pipeline deformation. FerroTec Thermoelectric adopts automatic straightening and bending equipment capable of processing copper tubes of various specifications. It delivers precise shaping and uniform parameters to reduce process deviations at the source.

▲ Copper Tube Straightening Machine

2. Nitrogen Pressure Holding: Equipment-Based Judgment

Welding determines the sealing performance and long-term durability of chillers. Traditional manual pressure holding and visual inspection are vulnerable to human and environmental factors, carrying risks of missed or false detections.

The FerroTec Thermoelectric production line features an automated nitrogen pressure holding process, forming a closed-loop workflow: gas filling → pressure stabilization → pressure hold timing → pressure drop evaluation. Pass or fail results are determined entirely by equipment, minimizing human intervention and ensuring reliable welding quality during production.

▲ Nitrogen Pressure Holding

3. Refrigerant Charging: No Charging with Substandard Vacuum Level

Before refrigerant filling, the charging unit automatically tests pipeline vacuum. If vacuum level fails to meet requirements, the system locks the process and blocks refrigerant charging. This prevents residual air and moisture inside pipelines from impairing cooling performance.

The entire charging process runs without manual operation, and all operational data is saved automatically. A complete quality record is created for every chiller to enable full lifecycle traceability.

▲ Refrigerant Charging

4. Post-Charging Inspection: Strict Zero-Leakage Standard

After refrigerant charging, helium testing equipment (Ecotec E3000 multi-gas leak detector) performs leak testing on the copper tube refrigerant circuit. Helium atoms are small and chemically inert, making helium an ideal tracer gas to pinpoint tiny leak points.

FerroTec Thermoelectric deploys advanced inspection tools and stringent criteria: a chiller can only leave the factory if its leak rate falls below the specified threshold.

▲ Post-Charging Inspection

Premium chillers are built on refined control across the entire production workflow. From copper tube bending, welding and pressure holding, to vacuum testing and helium leak detection, FerroTec Thermoelectric leverages automated equipment and traceable data to enforce standards in every manufacturing step. Every chiller delivered to customers undergoes rigorous multi-stage verification to ensure long-term stable and reliable operation.