-65°C 188L–488L Ultra Low Temperature Chest Freezer

The Realmann DWW Series Ultra-Low Temperature Chest Freezer is developed for commercial and specialized cold storage applications requiring temperatures substantially below those of conventional frozen food equipment. With a specified operating range of −40°C to −65°C, the series provides four capacity options for applications where deep-freezing conditions and insulated cabinet construction are important selection criteria.

The DWW188, DWW288, DWW388, and DWW488 models offer usable storage capacities of 188L, 288L, 388L, and 488L, respectively. Their horizontal cabinet configurations accommodate different storage volumes while maintaining a consistent depth of 680 mm and height of 900 mm.

A distinguishing feature of the DWW Series is its 100mm thick thermal insulation, designed to limit heat transfer between the ultra-low temperature compartment and the surrounding environment. Multi-layer door gaskets further help reduce air infiltration and moisture entry at the cabinet opening.

The refrigeration system incorporates a SECOP compressor, EBM condenser fan, and HONGKE temperature controller. A five-sided high-density cooling coil configuration provides heat-exchange surfaces around multiple sides of the cabinet, supporting the low-temperature refrigeration design.

Inside the freezer, a stainless steel lining provides a corrosion-resistant surface for storage and cleaning. The exterior features brushed-finish metal panels suited to commercial refrigeration installations.

Each model includes one storage basket for organizing stored products. A main power indicator provides visual confirmation of electrical supply, while a defrost drain helps facilitate water removal during cleaning and maintenance.

The DWW Series may be considered for specialized frozen seafood storage, food processing, and other low-temperature applications where the equipment’s verified performance meets the required storage conditions.

As a commercial ultra-low temperature freezer manufacturer, Realmann supports wholesale and OEM/ODM inquiries for refrigeration distributors, cold-chain equipment buyers, and specialized commercial storage projects.

Key Features & Benefits

1. Ultra-Low Temperature Range of −40°C to −65°C

The DWW Series is specified for temperatures from −40°C to −65°C.

This range is considerably lower than the operating temperature of conventional commercial chest freezers, making the series relevant to specialized frozen storage applications.

For temperature-critical projects, buyers should confirm performance at the intended setpoint under specified ambient and loading conditions.

2. 100mm Thick Thermal Insulation

The cabinet incorporates 100mm thick insulation, compared with the 90mm insulation specified for Realmann’s LOD Series.

The thicker insulation structure helps limit external heat transfer into the storage chamber, which is particularly important when maintaining large temperature differences between the cabinet interior and surrounding environment.

Actual energy performance depends on the complete refrigeration system and operating conditions.

3. SECOP Compressor Configuration

All four DWW models are specified with SECOP compressors.

The compressor is a core component of the refrigeration circuit, providing refrigerant compression for the ultra-low temperature refrigeration system.

The exact compressor model, refrigeration circuit configuration, and tested operating conditions should be confirmed during technical evaluation.

4. EBM Condenser Fan for Heat Rejection

The DWW Series includes an EBM condenser fan.

The fan supports airflow through the condenser, helping the refrigeration system reject heat to the surrounding environment.

Adequate ventilation and installation clearance remain important for maintaining the manufacturer’s specified operating conditions.

5. Five-Sided High-Density Cooling Coils

The freezer incorporates a five-sided high-density cooling coil design.

The arrangement provides refrigeration heat-exchange surfaces around multiple sides of the storage compartment.

This design supports heat removal from the cabinet, although actual temperature distribution must be confirmed through appropriate testing.

6. Stainless Steel Interior Chamber

A stainless steel interior provides a corrosion-resistant storage surface and supports routine cleaning.

This construction is suitable for appropriately packaged products in commercial low-temperature environments.

Buyers requiring a particular stainless steel grade should confirm the exact material specification.

7. Multi-Layer Door Gaskets

Multi-layer door sealing helps reduce air infiltration and moisture entry.

At ultra-low temperatures, effective sealing is important because warm, humid air entering the chamber can contribute to frost accumulation and additional refrigeration load.

Regular gasket inspection helps maintain sealing effectiveness.

8. HONGKE Temperature Controller

The DWW Series uses a HONGKE temperature controller for refrigeration temperature management.

The controller provides an interface for adjusting operating settings according to the system configuration.

The available monitoring, alarm, and recording functions should be confirmed from the specific controller model.

9. Brushed Metal Exterior Cabinet

The exterior uses brushed-finish metal panels, providing a professional appearance for commercial storage installations.

The cabinet construction is designed to support routine handling and exterior cleaning in suitable operating environments.

10. Main Power Indicator and Defrost Drain

A main power indicator provides a visual reference for electrical supply.

The cabinet also includes a defrost drain to facilitate water removal during manual defrosting and cleaning.

The indicator confirms power status but does not establish that the target freezer temperature has been reached.

Technical Specifications

DWW188 / DWW288 / DWW388 / DWW488 Comparison

Additional Product Specifications

All temperatures, dimensions, capacities and component brands are based on the supplied specifications. Refrigerant type, compressor model, rated power, energy consumption, container loading quantities and electrical supply have not been provided. Continuous performance at −65°C under specific ambient or loaded conditions requires manufacturer verification.

Commercial Applications

1. Specialized Frozen Seafood Storage

The DWW Series may be considered for seafood storage projects requiring temperatures below those of conventional commercial freezers.

Its specified −40°C to −65°C operating range is relevant to specialized deep-frozen seafood applications when the actual cabinet performance meets the product’s storage requirements.

2. Ultra-Low Temperature Tuna Storage

Certain premium tuna storage operations require particularly low temperatures to support their intended product quality requirements.

The DWW Series provides a potential equipment option for such applications, subject to confirmation of stable storage performance at the selected temperature.

The appropriate model should be selected according to product loading, packaging dimensions, and required storage duration.

3. Seafood Processing Facilities

Seafood processors may require additional dedicated freezer capacity for specific low-temperature storage stages.

The stainless steel interior, multi-layer sealing and four capacity configurations support equipment evaluation for specialized processing and storage environments.

4. Commercial Cold-Chain Storage Projects

Cold-chain equipment buyers may evaluate the DWW Series for projects involving products requiring ultra-low temperature storage.

The intended transport, loading, installation and storage conditions should be reviewed before selecting the equipment.

These cabinets are stationary freezers and should not be assumed suitable for refrigerated transport without additional specifications.

5. Specialty Food Storage Operations

Commercial kitchens, specialty frozen food suppliers and food processing facilities may require storage temperatures below those of ordinary frozen food equipment.

The DWW188 and DWW288 provide smaller capacity choices, while the DWW388 and DWW488 accommodate greater storage volumes.

OEM/ODM Customization and Wholesale Supply

Realmann provides commercial refrigeration manufacturing support for distributors, equipment importers and specialized low-temperature storage projects.

For specialized projects, buyers should provide the target temperature, ambient operating conditions, expected product load, electrical specifications and monitoring requirements when requesting a quotation.

Frequently Asked Questions (FAQ)

Q1: What is the Realmann DWW Series ultra-low temperature chest freezer?

The DWW Series is a range of horizontal freezers designed for specialized low-temperature storage.

It includes four models with usable capacities from 188L to 488L and a specified operating range of −40°C to −65°C.

Q2: What is the difference between the DWW Series and the LOD Series?

Both series are specified for −40°C to −65°C storage, but their component configurations differ.

The DWW Series emphasizes thicker insulation and specified refrigeration component brands, while the LOD Series offers larger maximum storage capacity.

Q3: Can the DWW Series maintain −65°C continuously?

The manufacturer’s specification lists an operating range extending to −65°C.

However, continuous operation at that temperature under a particular ambient temperature and product load should be confirmed through appropriate testing before the equipment is selected for critical storage.

Q4: Why does the freezer use 100mm insulation?

Ultra-low temperature equipment operates with a large temperature difference between the storage compartment and ambient environment.

The 100mm insulation helps limit heat transfer into the cabinet and supports the overall refrigeration design.

Q5: What compressor brand is used?

All four models use SECOP compressors according to the supplied technical specifications.

The exact compressor model should be confirmed for technical evaluation.

Q6: What is the purpose of the EBM condenser fan?

The condenser fan moves air through the condenser to support heat rejection from the refrigeration system.

Proper ventilation remains necessary to support normal operation.

Q7: What temperature controller does the DWW Series use?

The DWW Series is equipped with a HONGKE temperature controller.

The exact control, display, alarm and recording functions depend on the controller model and should be confirmed before ordering.

Q8: What is the advantage of five-sided cooling coils?

The five-sided cooling coil arrangement provides refrigeration heat-exchange surfaces around multiple sides of the storage compartment.

This design supports heat removal, but actual cooling uniformity and recovery performance depend on the complete refrigeration system.

Q9: Is the interior made of stainless steel?

Yes. All four models are specified with stainless steel interiors.

The material grade should be confirmed if the application requires a particular corrosion resistance or cleaning specification.

Q10: What refrigerant does the DWW Series use?

The refrigerant has not been identified in the supplied technical sheet.

Buyers should request confirmation of the refrigerant type, refrigerant charge, refrigeration circuit and applicable safety requirements before ordering.

Q11: Does the freezer require manual defrosting?

The series uses direct cooling and may require periodic manual defrosting when frost accumulates.

A defrost drain is provided to facilitate water removal.

Q12: Can the DWW Series be used to store premium frozen tuna?

The series may be considered for specialized tuna storage where the verified freezer performance meets the product’s required temperature.

Buyers should confirm the required storage temperature, product loading conditions and temperature stability before selecting the equipment.

Q13: Which DWW model has the largest capacity?

The DWW488 offers the largest usable capacity at 488L.

Its exterior dimensions are 1850 × 680 × 900 mm.

Q14: Are the DWW freezers suitable for medical or laboratory applications?

The supplied information does not establish suitability for vaccines, biological samples, pharmaceuticals or other regulated laboratory materials.

Such applications may require validated temperature uniformity, monitoring, alarm systems, backup power and specific certifications.

Q15: Does Realmann provide OEM/ODM and wholesale supply?

Yes. Realmann supports inquiries for commercial refrigeration wholesale and OEM/ODM projects.

Buyers can discuss storage capacity, target temperature, installation conditions, customization requirements, order quantities and shipping arrangements.

Need a Commercial Ultra-Low Temperature Freezer for Your Project?

Explore Realmann DWW188, DWW288, DWW388 and DWW488 chest freezers. Contact our team to discuss operating temperatures, capacity requirements, refrigeration configurations and OEM/ODM manufacturing.

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