Bakery Products
Freezes par baked and fully baked bread, rolls, croissants, and laminated doughs with controlled airflow that prevents crust cracking and moisture loss.
Spiral Freezer
Square single and double drum spiral freezers freeze 500 to 10,000 kg/h in a compact footprint. Available with SUS304 wire mesh belts, Direct Drive (DDS) modular plastic belts, and I, L, or U infeed and outfeed layouts, each unit pairs Hennecke PIR panels and variable pitch coils with optional ADF air defrost and CIP cleaning.
Single drum, double drum (Layouts A, B, or C), and Direct Drive (DDS) options
Freezing capacity from 500 to 10,000 kg/h
Open stainless steel interior for full washdown and maintenance access
PLC touchscreen control with recipe storage and optional automated CIP sanitation
High density PIR insulated enclosure with optional fully welded stainless steel interior
Product Features
Multiple Design Decisions, Supported by Data
Key drive, airflow, coil, and cleaning features built for reliable daily runs.
Large Sprocket / Chain Drive
- Synchronized triple drive system eliminates belt over tensioning across high tier counts.
- Heavy duty SUS304 fully welded drum and frame structure simplifies routine inspection.
- Stepless VFD speed control matches retention time to each product specification.
Stainless Steel Mesh Belt
- SUS304 food grade spring wire mesh belts (400 to 1,372 mm wide) with an 8 to 10 year service life and optional side guards.
- Direct Drive Spiral (DDS) option with modular plastic belts that eliminate edge friction against the drum for easy cleaning and module replacement.
- Open mesh design promotes vertical and horizontal airflow and fast washdown.
Finite Element Analysis
Every spiral drum and frame is computer modeled (FEA) to verify strength under cold contraction and full product loads.
Efficient Evaporator
- Simulated with European thermal hydraulic heat exchanger design software.
- Hydraulically expanded tubes create an intimate mechanical bond between tubes and fins for high heat transfer efficiency.
- Variable fin pitch delays frost bridging at the leading air edge and extends runtime between defrosts.
- Available with stainless steel or aluminum tubes and aluminum fins.
Insulated Enclosure
Made in our own plant on a German Hennecke PIR line from 50 to 250 mm thick, with tight cam lock joints and an optional welded stainless steel inner liner.
Fully Welded Floor
Modular, fully welded stainless steel floor pan sloped toward four corner drains for rapid washdown evacuation without standing water.
Air Flow Design
- Internal air baffles guide high velocity cold air uniformly across all belt tiers.
- Minimizes product dehydration (< 0.5%) while maximizing surface heat transfer.
- Infeed and outfeed air shrouds limit warm ambient air infiltration and frost carryover.
- Walk in maintenance corridors provide full operator access around the drum and evaporator banks.
Intelligent Control System
- Siemens PLC touchscreen in a stainless steel cabinet displays live zone temperatures, belt speed, and fault alarms.
- Stores preset freezing programs for different products with optional remote troubleshooting.
- Equipped with a belt flip detector, internal emergency cable pull switch, and multi-zone temperature monitor.
Air Defrost System
- The air defrost system (ADF) sweeps high velocity pulsed air across evaporator fins during production to clear frost crystals before ice bridges form.
- Maintains stable chamber temperature and static pressure across extended shifts.
- Extends continuous production runs to 48+ hours between full defrost cycles.
Automated CIP (CIP) System
Automated foaming, rinsing, sanitizing, and drying cycles clean the belt, drum, coil, and interior using saved PLC wash recipes.
Technical Specifications
Parameters
Standard specifications for Square single drum, double drum, and Direct Drive (DDS) spiral freezers. We size drum diameter, belt width, tier count, I, L, or U layout, and refrigerant circuit for your line.
| Parameter | Single Drum Spiral Freezer | Double Drum Spiral Freezer |
|---|---|---|
| Structure Options | Single drum low tension or Direct Drive (DDS) | Double drum low tension (Layouts A, B, or C) |
| Capacity | 200 to 5,000 kg/h | Up to 10,000 kg/h |
| Drum Diameter | 1,620 to 5,800 mm | 1,620 to 5,800 mm |
| Layers (Tiers) | 6 to 40 tiers | 6 to 40 tiers per drum |
| Mesh Belt Width | 520 to 1,372 mm (suitable width 400 to 1,372 mm) | 520 to 1,220 mm |
| Belt Material | SUS304 food grade spring wire (8 to 10 yr life) or DDS modular plastic belt | SUS304 food grade spring wire or modular plastic belt |
| Infeed / Outfeed Length | 500 mm infeed / 500 mm outfeed | 500 mm infeed / 500 mm outfeed |
| Infeed / Outfeed Layout | I-type (straight through), L-type (90° turn), or U-type (180° turn) | I-type (straight through), L-type (90° turn), or U-type (180° turn) |
| Insulated Enclosure | Hennecke PIR / PU panels (50 to 250 mm), double side stainless steel skin, optional fully welded liner | |
| Control Panel | Siemens PLC touchscreen, SUS304 stainless steel cabinet | |
| Safety Devices | Belt flip detector, internal emergency cable pull switch, multi-zone temperature monitor | |
| Refrigerants | Ammonia (NH3, R717), CO2 (R744), or Freon (HFC) | |
| Evaporator | Aluminum or stainless steel tubes, aluminum fins, variable fin pitch | |
| Defrost | Water defrost / Hot gas defrost / Optional Air Defrost System (ADF) | |
| Freezing / Cooling Time | Stepless variable frequency adjustable | |
| Cleaning | Manual washdown / Belt washer / Optional automated CIP system | |
Design Details
How Each Subsystem Is Engineered
Open each section below to see how key parts of the freezer work.
Airflow & Heat Transfer Design
Cold air is delivered through carefully positioned baffles and ducts to create uniform, high velocity airflow across every product on the belt. Computational fluid dynamics (CFD) modeling during design ensures:
- Air velocity variance ≤ ±15% across entire belt width
- Product dehydration kept below 0.5% for IQF applications
- Air shrouds at infeed/outfeed openings reduce cold loss by ~30%
Defrost Strategy: ADF, Hot Gas, and Water
- Air Defrost System (ADF): Pressurized air pulses clear evaporator frost while production continues, recovering approximately 2.5 hours per day of production time compared to manual defrost.
- Hot Gas Defrost: Reverses refrigerant flow to warm evaporator coils for rapid defrosting (8 to 12 minutes).
- Water Defrost: Warm water spray over evaporator coils for simple, reliable frost removal (20 to 30 minutes).
Automated CIP (CIP) & Hygienic Design
An automated CIP system executes programmable wash, rinse, and sanitizing cycles. The open profile stainless steel structure, sloped fully welded drainage floor, and tool free inspection doors provide:
- Complete CIP sanitation cycles in 25 to 45 minutes compared to 90+ minutes for manual cleaning
- Hygienic access to all product contact surfaces without specialized tools
- Programmable PLC sanitation recipes for daily deep cleaning, product changeovers, or end of shift rinsing
Insulation & Enclosure Structure
Continuous polyisocyanurate (PIR) panels produced in our own factory on a German Hennecke foaming line give Square full control over enclosure quality and delivery schedule:
- Panel thickness: 50 to 250 mm, selected per operating temperature and ambient conditions
- Thermal conductivity: ≤ 0.022 W/(m·K); density: 38 to 42 kg/m³
- Panel joint: cam lock system with thermal break to eliminate cold bridging
- Optional: fully welded stainless steel interior for maximum sanitation
Automation & Control Architecture
A Siemens PLC with a color touchscreen in a stainless steel panel logs zone temperatures, belt speed, and fan status:
- Stores 50+ product freezing recipes (dwell time, temperature, and fan speed)
- Equipped with three key safety switches: a belt flip detector, an internal emergency cable pull switch, and a multi-zone temperature monitor
- Optional VPN remote troubleshooting resolves 70% of issues without a site visit
Proven in These Food Applications
Chinese Pastry Products
Individually quick freezes dumplings, baozi, steamed buns, spring rolls, and parathas at high hourly throughput without wrapper cracking.
Ice Cream
Rapidly hardens extruded, novelty, and tubbed ice cream to −25°C core temperature to lock in smooth micro crystalline texture.
Poultry Products (Cooked)
Chills and freezes fully cooked, roasted, or battered poultry portions immediately after thermal processing to lock in yield and coating crispness.
Poultry Products (Raw)
Freezes raw marinated or IQF chicken breasts, wings, drumsticks, and fillets with surface dehydration below 0.5%.
Ready Meals
Freezes tray sealed ready meals, airline catering trays, and portioned entrees uniformly across multiple tier spiral stacks.
Seafood
Freezes whole fish, skin on fillets, peeled shrimp, scallops, and cephalopods prior to glazing and master carton packing.
Case Studies
Spiral Freezer in Operation Worldwide
Proven installations running in food plants around the world.
Large Capacity Spiral Freezer Installation: Saudi Arabia
A high capacity double drum spiral freezer installed in Jeddah, Saudi Arabia, for continuous IQF
Spiral Cooling and Freezing Line for Steamed Dumplings: Chicago, USA
An integrated ambient spiral cooler and NH3/Bitzer refrigerated spiral freezer system installed in Chicago to
Fried Chicken Nugget Processing and Freezing Line: Chicago, USA
A turnkey battered and par fried chicken nugget processing line in the Chicago area integrating
Integrated Freeze Drying Cold Chain System for Pet Food: California, USA
Custom low temperature refrigeration and freezing systems supplied to Canature Processing Ltd. for high capacity
Badafi Foods: Fresh IQF Vegetables from Field to Plate on the Same Day
A Square spiral freezing line installed in McAllen, Texas, USA, processing freshly harvested okra and
Chata Foods: Double Drum Spiral Freezer for Prepared Mexican Foods
A high capacity double drum spiral freezer installed at Chata Foods in Mexico to expand
Double Drum Spiral Freezer and MYCOM Refrigeration System: Colombia
A complete double drum spiral freezer and MYCOM screw compressor refrigeration plant commissioned for a
Spiral Dumpling Freezing System for ITACI SRL: Ancona, Italy
A custom built spiral freezer and refrigeration system delivered to ITACI SRL in Ancona, Italy,
Grupo San Antonio: Spiral Freezer and Refrigeration Upgrade in Mexico
A Square spiral freezer and industrial refrigeration system commissioned for Grupo Pecuario San Antonio in
Automated Croissant Proofing and Freezing Line: Zhiyan Food
An integrated croissant production line combining continuous proofing, cooling, and spiral dough freezing for Zhiyan
Spiral Freezer, Spiral Chiller and Tunnel Chiller for Mercuries F&B
Multiple stage spiral chilling, tunnel chilling, and spiral freezing systems delivered to Mercuries F&B for
Australis Seafoods: Heavy Duty Spiral Freezer for Whole Salmon
A heavy duty stainless steel spiral freezer engineered for Australis Seafoods in Chile to freeze
Camanchaca: Spiral Freezer with Remote Monitoring for Salmon Fillets
An IQF spiral freezer with PLC remote diagnostics and monitoring commissioned for Pesquera Camanchaca in
Mexico PATSA: Spiral Freezer with Plastic Modular Belt for Chicken Parts
A spiral freezer equipped with a food grade plastic modular belt delivered to Productos Agropecuarios
WEDOME Bakery: Pre Proofing and Freezing Line for Croissants
An automated croissant proofing and spiral freezing line installed at WEDOME's central bakery factory in
Turnkey Ready Meal Processing and Freezing Line: Europe
A complete cooked and tray packed ready meal production and spiral freezing line engineered and
Spiral Freezer and Automated Conveyor Line for Ready Meal Plant: Europe
An integrated spiral freezer and multi line transport conveyor system delivered to a European prepared
Spiral Freezer Installation for Holiland Central Bakery
A hygienic spiral cooling and freezing system supplied to Holiland, one of China's largest bakery
Frequently Asked Questions
Our spiral freezers use open stainless steel frames, walk in doors, welded sloped drain floors, and optional automated CIP systems for fast daily washdowns.
- High freezing throughput (200 to 10,000 kg/h) in a compact floor footprint
- Uniform and fast freezing across all belt tiers
- Energy-efficient evaporator and airflow design
- Customizable belt width (400 to 1,372 mm), tier count (6 to 40 tiers), drum diameter (1,620 to 5,800 mm), and I, L, or U layout
- Compatible with loose IQF items, trays, cartons, and bagged products
Square holds ISO 9001, ISO 45001, CE, PED, ASME (U and U2 stamps), EAC, CSA, CRN, and CNAS laboratory accreditation, supported by 300+ patents, 300+ R&D engineers, and 300+ installation and service engineers.
We customize drum diameter (1,620 to 5,800 mm), belt width (400 to 1,372 mm), tier count (6 to 40 tiers), I, L, or U infeed and outfeed layout (straight through, 90° turn, or 180° turn), double drum layout (A, B, or C), refrigerant, and ADF or CIP options.
A tunnel freezer uses a straight horizontal belt to move products through a linear freezing tunnel, while a spiral freezer uses a vertically stacked spiral belt (6 to 40 tiers) to save floor space and allow longer dwell times.
Engineering Inquiry
Discuss Your Spiral Freezer Project
Share your product and hourly capacity for a custom spiral freezer quote.
Our engineers reply within 24 hours. All project details are kept confidential.
