Belt Tunnel Freezer

SW-TB is a belt tunnel freezer for IQF freezing of flat, thin-profile foods. It freezes 300–700 kg/h from a +25 °C inlet to a −18 °C outlet on a 1,200 mm stainless-steel belt inside a 13–22 m tunnel, using R404A, R507, NH3 or CO2 refrigerant with 18–38 kW installed power. It is the standard choice for fillets, peeled shrimp, squid rings, scallops and formed meat patties.

How it works

Product is spread in a single layer on a continuous stainless belt and carried through pre-cooling and deep-freezing zones. A high-efficiency aluminium-fin and copper-tube evaporator with controlled air circulation removes heat from every piece individually, so the product leaves the tunnel as separate IQF pieces rather than a frozen block.

Key Advantages

• High-Efficiency Evaporator: Aluminum fin + copper tube heat exchanger delivers 25%+ better heat transfer vs. conventional designs, significantly reducing energy consumption
• Dual-Drive Anti-Slip System: Independent VFD drives at both inlet and outlet prevent belt slippage under heavy loads
• PUR Insulation: 150mm high-pressure foamed PU sandwich panels, thermal conductivity ≤0.022W/(m·K), minimal cold loss
• Smart Control: PLC + HMI touchscreen central control system with real-time monitoring of zone temperature, air velocity, belt speed; auto-alarm with fault logging
• Hygienic Design: All food-contact surfaces in 304 stainless steel, rounded corners, FDA/EU food-grade compliant, CIP cleaning ports pre-configured

Typical Applications

Cod/Tilapia/Basa fillets, P&D shrimp, Squid rings/slices, Scallops, Beef/pork/chicken steaks, Burger patties, Thin-cut meat slices

Specifying an SW-TB

Four inputs determine the configuration: product type and thickness, required hourly output, inlet temperature, and the refrigerant available on site. Belt width is fixed at 1,200 mm; tunnel length is then set by the freezing time your product needs.