Conveyor Blast Freezer (Tunnel)

RITI engineers tunnel freezers to the specific needs of each customer, delivering equipment sized exactly for the target process. This approach avoids over-specified capacity and reduces both capital cost and ongoing energy consumption. Tunnel blast freezers offer the best price-to-throughput ratio for products that tolerate tier-to-tier transfer. Product travels through the chamber on dedicated trays or carriers; the freezing cycle can be batch or continuous, with a typical cycle time of 45–60 minutes per batch

Tunnel Section

• Thermally insulated enclosure.
• Multi-tier conveyor transport system.
• Conveyor drives — SEW-Eurodrive gear motors (Germany).
• Variable-frequency conveyor speed control (VFD).
• Custom air cooler (evaporator) — Goedhard (Czech Republic / Netherlands).
• Ziehl-Abegg fans (Germany).
• Electronic refrigerant-feed control to the evaporators.
• Stainless-steel inlet plenum (confuser).
• Integrated control, monitoring, and protection panel for the tunnel electrical system.

All tunnel framework — stainless steel.


Compressor / Receiver Package

• BITZER screw compressor (Germany).
• Economizer with electronic refrigerant-feed control.
• Oil line — oil filter, flow switch, sight glass.
• Oil separator.
• Air-cooled oil cooler (thermosiphon available on request).
• Liquid receiver — shut-off valves, safety relief valve, check valve, differential pressure valve.
• Liquid line — filter drier, shut-off valve, sight glass.
• Suction accumulator (liquid separator) with regenerative heat exchanger.
• Suction line with inline strainer.
• High- and low-pressure switches (pressostats).
• Control cabinet with mnemonic/synoptic display of the package.
• Güntner air-cooled condenser (Germany).
• Condensing-pressure regulator.
• Documentation package — operating manual and wiring/P&ID diagrams.

Tunnel flash-freezing chambers offer the best value for money when processing products that can be transferred from one shelf to another. Tunnel freezing is a process in which the product enters the freezing chamber on special trays. Depending on the chamber configuration, the freezing cycle can be intermittent or continuous, and the freezing time for a single batch depends on the product characteristics (on average, 45–60 minutes).

We supply blast-freezing tunnels that precisely meet the requirements of a specific production facility, so their cost may vary depending on size, technical specifications, automation levels, and other factors. You can find out the exact cost by using the online inquiry form on our website.