Rail-guided spiral freezer

Compared with conventional spiral freezers, the rail-guided design eliminates the central drum and belt tensioning device. It helps prevent belt turnover, extends belt life, reduces installed power and simplifies maintenance. A single spiral can provide low-level infeed and discharge, with different path geometries available.

Suitable for precooling, freezing and baking processes for seafood, meat and prepared foods.

Rail-guided and conventional spiral freezer comparison

Comparison item	Rail-guided spiral freezer	Conventional spiral freezer
Drive system	Multi-level gears drive both sides of the belt along guide rails. Polymer slide blocks engage with the rails to prevent slipping and belt turnover, with straightforward assembly and maintenance.	Static friction between the drum and belt provides drive. Slipping, wear, uneven loading and belt turnover can increase maintenance demands and shorten service life.
Installed power	Self-lubricating components reduce friction. No tensioning drive motor is required, reducing installed power and energy consumption.	The drum pulls the belt around the track with higher friction and an additional tensioning drive motor, increasing installed power.
Belt tensioning mechanism	None	Included
Travel path	Circular, oval and other geometric paths are possible.	Circular paths only.
Layout	A single spiral supports low-level infeed and discharge.	A single spiral provides low infeed and high discharge; two spirals are needed for low infeed and discharge.
Product moisture loss	≤1%	≥3

Technical specifications

Model	DLX500	DLX1000	SLX1500	SLX2000
Nominal freezing capacity	500Kg/h	1000Kg/h	1500Kg/h	2000Kg/h
Required refrigeration capacity (Evaporator temperature: −42°C)	80KW	175KW	240KW	320KW
Installed power	15KW	27.7KW	40.7KW	53.5KW
Refrigerant	R507 / R744 / R717, according to customer requirements.
Internal air temperature	-35°C
Infeed temperature	10°C
Discharge temperature	-18°C
Enclosure dimensions	7700x5500x3200mm	7700x5500x4300mm	14300x6200x3700mm	14300x6200x4200mm
Belt width	708 (Effective width: 590)	708 (Effective width: 590)	786 (Effective width: 670)	786 (Effective width: 670)
Freezing time	15-75min (Continuously adjustable)	20-100min (Continuously adjustable)	20-100min (Continuously adjustable)	20-100min (Continuously adjustable)
Product clearance height	100mm	100mm	100mm	100mm
Power supply	380V/3ph/50HZ
Remarks: 1. Freezing capacity depends on product shape, size, moisture content and physical and chemical properties. 2. Best performance is achieved in processing areas below 20°C. 3. Infeed and discharge direction, conveyor length and product clearance can be customized.