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Mechanical Freezers (IQFs) > Spiral Freezers

Single Drum Spiral

Within the past decades, SFT has been designing and manufacturing low-temperature mechanical refrigeration systems for fast freezing of various food products such as fruits, vegetables, red meat, poultry, and bakery, etc. In addition to plate freezers and tunnel freezers, we also have spiral freezers in our product line.

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DESCRIPTION
DOCUMENTS
PROJECTS

The spiral freezer is a continuous inline belt freezer designed to minimize product weight loss and assure quality with gentle handling during the freezing process. Products are evenly fed from the production line directly onto the loading freezer belt. It quickly transports the product into the low temperature-freezing zone. The belt spirals up or down along the rotating drum until it reaches the top or bottom where the frozen product is gently discharged from the freezer discharge port. Due to the large belt surface available, products can be frozen in single layers or individually for high quality. Because products can maintain their original load-in position throughout the freezing process, sorting after simultaneous freezing of mixed, different products is simplified.

The single drum spiral freezer is designed to enable an easy installation on production floors where space is restricted. The SFT single drum spiral freezer is available as either a conventional low-tension helix or, as an option with a direct drive system which can offer reduced belt tensions and smoother running. The construction of the drum is designed for fast setup and efficient local installation. This flexibility continues throughout various single-drum designs and offers several possibilities for infeed and outfeed conveyors.

inlet and outlet direction

BENEFITS

  • Pre-Assembled and fully tested at our factory before shipping.
  • Ready to be placed and connected to refrigeration, electrical and water service.
  • Built to meet the stringent hygienic specifications and standards.
  • Reliable and long-life helix units.
  • Continuous inline food freezing.
  • Gentle smooth handling of products.
  • Compact design lowers operation cost and saves process floor space.
  • High efficiency allows fast freezing.
  • Minimum product weight loss by exposure to the lowest air temperature at all times.
  • Stainless steel construction.
  • Easy access to sanitation and maintenance from all sides.
  • Custom designs to fit your requirements
  • The compact drive device is durable, safe and low in maintenance.

APPLICATIONS

The single drum spiral freezer can freeze a maximum number of products in minimum space, which is especially suited for products needed long retention time. So the spiral freezer is widely used for the following industries.

  • Poultry industry: chicken parts, chicken patties, chicken nuggets, marinated chicken chunk, breaded chicken parts
  • Red meat industry: meat patties, meatballs, raw hamburger, breaded fried cuts
  • Seafood industry: breaded fish sticks or patties, raw shrimp, fish fillets, scallops, whole fish
  • Bakery products: pizza crust, pie, cookie, pasta, bread dough
  • Prepared foods: packaged food in trays, shrimp in trays, ice cream cups, products requiring a long retention time.
Specifications

Model

Freezing Capacity¹

Inlet Temp.

Outlet Temp.

Freezing Temp.

Freezing Time

Refrigerant

Cold Capacity

Install Power

SFS-300

300 kgs/hr

+50℃

-18℃

-35℃

15 ~ 75 mins, adjustable

R22/R404/R717

50 kW

12 kW

SFS-400

400 kgs/hr

+50℃

-18℃

-35℃

15 ~ 75 mins, adjustable

R22/R404/R717

70 kW

16 kW

SFS-500

500 kgs/hr

+50℃

-18℃

-35℃

20 ~ 100 mins, adjustable

R22/R404/R717

85 kW

18 kW

SFS-750

750 kgs/hr

+50℃

-18℃

-35℃

20 ~ 100 mins, adjustable

R22/R404/R717

135 kW

20 kW

SFS-1000

1000 kgs/hr

+50℃

-18℃

-35℃

20 ~ 100 mins, adjustable

R22/R404/R717

170 kW

25 kW

Technical data is subject to change without prior notice due to technical development.

Notes:

  • 1. The nominal freezing capacity is rated on the basis of freezing fried chicken nuggets with standard density of 5.5 kg per square meter.
  • 2. The refrigeration capacity is rated on the basis on condensing temperature at +35℃ and evaporating temperature at -42℃.
  • 3. The freezing time is adjustable within 15~100 minutes which based on product inlet temperature at +50℃ and outlet core temperature at -18℃. The freezing time differs because of different products.

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