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Zhengzhou Great Wall Scientific Industrial & Trading Co., Ltd.

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BrandThe Great Wall
OriginHenan, China
Manufacturer TypeOEM Manufacturer
Country of OriginChina
ModelDHJF-1020
QuotationUpon Request
Cooling Capacity600 W at −60 °C, 480 W at −80 °C, 180 W at −100 °C
Temperature Range−100 °C to −60 °C
Temperature Stability±2 °C
Bath Volume20 L
Pump Flow Rate20 L/min
Maximum Pressure0.4 bar
Circulation Pump Power100 W
Total Power Consumption4 kW
RefrigerantMixed Cryogenic Refrigerant
Evaporator TypeCoil-in-Tank (Immersion)
CompressorPanasonic Hermetic Scroll Compressor
CondenserAir-Cooled Finned-Tube with Oxygen-Free Copper
Heat Exchanger ArchitectureSingle-Stage Compression with Series-Coupled Subcooling Stages
Control InterfaceLCD Display with Digital Keypad
Safety ProtectionsPhase Sequence Monitoring, Overcurrent Protection, Overtemperature Cut-off, Delayed Start, Thermal Overload Relay
Ambient Operating Conditions5–35 °C, ≤70% RH
Power Supply3-phase, 380 V, 50 Hz
External Port Size1/2″ BSP
Bath Opening Diameter280 mm
Bath Dimensions (Ø × H)300 × 300 mm
Max Flask Capacity5000 mL
Bath MaterialAISI 304 Stainless Steel
Footprint (W × D × H)810 × 1160 × 1310 mm
Net Weight154 kg
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BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Country of OriginChina
ModelDHJF-8002W Horizontal
Instrument TypeHorizontal
Temperature Stability±2 °C
Operating Temperature Range−80 °C to +10 °C
Bath Opening DiameterØ140 mm
Bath Volume2 L
External Dimensions410 W × 610 D × 495 H mm
Net Weight68 kg
RefrigerantsR404A / R23
Cooling Capacity200 W at −40 °C, 120 W at −60 °C, 60 W at −80 °C
Magnetic Stirring Power50 W
Stirring Speed Range100–1000 rpm
Heating ProtectionDry-run prevention (heating models only)
Safety ProtectionsDelayed start, overcurrent, overtemperature
Power Supply220 V~, 50 Hz
Ambient Operating Conditions5–35 °C, ≤70% RH
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BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
ModelDHJF-1050
Cooling Capacity700 W at −60 °C
Temperature Range−100 °C to −60 °C
Temperature Stability±2 °C
Bath Volume50 L
Pump Flow Rate20 L/min
Maximum Pressure0.4 bar
Circulation Pump Power100 W
Total Power Consumption4876 W
Display Resolution0.1 °C
RefrigerantMixed Cryogenic Refrigerant
Evaporator TypeCoil-in-Tank (Stainless Steel 304)
CompressorPanasonic Hermetic Scroll Compressor
CondenserAir-Cooled Finned-Tube with Oxygen-Free Copper
Heat Exchanger ArchitectureSingle-Stage Compression with Series-Connected Subcooling Stages
Safety ProtectionsPhase Sequence, Overcurrent, Overheat, Delayed Start
Ambient Operating Conditions5–35 °C, ≤70% RH
Power Supply3-phase, 380 V, 50 Hz
External Port Size1/2″ BSP
Bath Opening Diameter400 mm
Bath Dimensions (Ø × H)450 × 320 mm
Max Flask Capacity20 L
Unit Dimensions (W × D × H)1340 × 820 × 1310 mm
Net Weight265 kg
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BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Instrument TypeSplit-System
Cooling MethodAir-Cooled
Temperature Range−30 °C to +10 °C
Refrigeration Capacity3.5 kW to 28 kW
Temperature Stability±2 °C
Circulating Pump Pressure2.2 bar
Circulating Pump Flow Rate67 L/min
Reservoir Volume200 L
Operation ModeContinuous Duty
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KeyBrand: The Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Country of OriginChina
ModelDL10-1000G Circulating Chiller
PricingUpon Request
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BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Country of OriginChina
ModelVT-5000HC
PricingAvailable Upon Request
Cooling Capacity920 W at −10°C, 520 W at −20°C, 280 W at −30°C, 40 W at −40°C
Minimum No-Load Temperature−40°C
Cooling MethodIndirect (Closed-Circuit Refrigeration)
Temperature DisplayDigital, Pt100 Sensor
Temperature Setpoint RangeAdjustable Within Operating Range
Safety ProtectionsDelayed Start, Overcurrent Protection, Overtemperature Protection
RefrigerantR404A
Cold Trap Chamber DimensionsØ250 × 250 mm (Stainless Steel 304)
Condenser Flask DimensionsØ50 × 300 mm
Condenser Flask MaterialDIN 3.3 Borosilicate Glass (ISO 3585)
Quantity of Flasks3
Vacuum Port InterfaceFlexible Tubing Fitting, OD 12 mm
Ambient Operating Conditions5–35°C, ≤70% RH
Power Supply220–240 V~, 50 Hz
Total Power Consumption835 W
Rated Current3.8 A
Overall Dimensions (W×D×H)537 × 579 × 1094 mm
Net Weight85 kg
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BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Country of OriginChina
ModelZT-20-200-30H (Air-Cooled)
Temperature Range−30 °C to 200 °C
Temperature Stability±0.5 °C
Power Supply220–240 V~, 50 Hz
Total Power Consumption4.7 kW
Cooling Capacity1.7 kW at 200 °C / 2.6 kW at 10 °C / 1.1 kW at −10 °C / 0.7 kW at −20 °C / 0.3 kW at −30 °C
RefrigerantR22
Bath Fluid Volume10 L
Heating Power3 kW
Pump Flow Rate30 L/min
Pump Pressure1 bar
Dimensions (W×D×H)580 × 825 × 1370 mm
Weight172 kg
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BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
ModelZT-20-200-80H
Temperature Stability±0.5 °C (at 15–65 °C)
Temperature Range−80 to 200 °C
Cooling Capacity1.7 kW @ 200 °C, 4.3 kW @ 10 °C, 3.1 kW @ −10 °C, 2.3 kW @ −20 °C, 1.2 kW @ −30 °C, 2 kW @ −35 °C, 1.4 kW @ −60 °C, 0.45 kW @ −78 °C
Heating Power3 kW
Total Power Consumption7.9 kW
Pump Flow Rate30 L/min (max), Pressure: 1 bar (max)
Bath Volume12 L
Display7″ color TFT touchscreen, resolution 0.01 °C
CommunicationRS485, USB
RefrigerantsR404A + R23
ProtectionOvertemperature, high-pressure refrigeration, leakage, phase sequence, thermal overload, overcurrent, compressor delay start
EnclosureCold-rolled steel with powder coating
IP RatingIP20
Pollution Degree2
Dimensions (W×D×H)885 × 1315 × 1565 mm
Weight393 kg
Ambient Operating Conditions5–35 °C, ≤70% RH
Standard Accessories2.6 m insulated stainless-steel flexible hose
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BrandThe Great Wall
OriginHenan, China
Manufacturer TypeOriginal Equipment Manufacturer (OEM)
Country of ManufactureChina
ModelDHJF-1020
QuotationUpon Request
RefrigerantMixed Cryogenic Refrigerant
Tank Capacity20 L
Temperature Range−100 °C to −60 °C
Temperature Stability±2 °C
Refrigeration Capacity600 W at −60 °C
Circulation Pump Power100 W
Flow Rate20 L/min
Max. Pressure0.4 bar
Power Supply3-phase, 380 V, 50 Hz
Total Power Consumption4000 W
Tank Dimensions (Ø×H)300 mm × 300 mm
Opening Diameter280 mm
External Port Size1/2″ BSP
Compatible Flask VolumeUp to 5000 mL
Tank MaterialAISI 304 Stainless Steel
Unit Dimensions (W×D×H)810 × 1160 × 1310 mm
Net Weight154 kg
Ambient Operating Conditions5–35 °C, ≤70% RH
Safety ProtectionsPhase sequence monitoring, overcurrent protection, thermal overload cutoff, startup delay logic
Operational ConstraintExternal circulation function disabled when bath temperature < −90 °C
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BrandGreat Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Product CategoryDomestic Laboratory Refrigeration Equipment
ModelDL10-3000G
Cooling Capacity3000 W (at 25°C ambient, 15°C coolant)
Operating Temperature Range–10°C to 25°C (max. setpoint ≤ ambient – 5°C)
Temperature Stability±2°C
Control AlgorithmPID
RefrigerantR134a (CFC-free)
Pump Flow Rate16 L/min
Reservoir Volume30 L
Reservoir MaterialSUS304 Stainless Steel
External PortRc 1/2 internal thread
Power Supply220–240 V~, 50 Hz
Rated Power2200 W
Rated Current11.7 A
Dimensions (W×D×H)495 × 760 × 860 mm
Net Weight108 kg
Ambient Operating Conditions5–35°C, ≤70% RH
Safety ProtectionsCompressor delay start, high-pressure, overload, and overcurrent protection
Temperature SensorPt100
DisplayDigital temperature readout with integrated level and pressure indicators
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BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Country of OriginChina
ModelDLSB-ZC
PricingAvailable Upon Request
Cooling Capacity600–2550 W (at -10 °C to 25 °C)
Temperature Range–10 °C to 25 °C (with ΔT ≥ 5 °C below ambient)
Temperature Stability±2 °C
Vacuum Level0.098 MPa (2 kPa absolute)
Dual-FunctionSimultaneous vacuum generation and low-temperature circulation
Vacuum Pump Configuration3 independent pumping heads, 10 L/min per head
Reservoir Volume20 L
Circulation Flow Rate30 L/min (rated), 280 W pump power
Electrical Supply220–240 V~, 50 Hz
Total Power Consumption1650 W
Dimensions (W×D×H)595 × 475 × 925 mm
CompressorPanasonic
CondenserAir-cooled, custom-designed by Xin’ao
Dryer FilterDanfoss
Expansion Device & EvaporatorZhengzhou Great Wall
ControllerHaihong
Vacuum Chamber & Insulated ReservoirZhengzhou Great Wall
Circulation PumpJingyi
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BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Product CategoryDomestic
ModelDL10-2000
Instrument TypeIntegrated Unit
Cooling MethodAir-Cooled
Temperature Control Range−10 to 25 °C
Refrigeration Capacity2000 W @ 15 °C
Temperature Stability±2 °C
Circulation Pump Pressure1 bar
Circulation Flow Rate30 L/min
Reservoir Volume17 L
Operating ModeContinuous
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BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Country of OriginChina
ModelDHJF-8002W
PriceUpon Request
Tank Capacity2 L
Temperature Range−80 °C to +10 °C
Temperature Stability±2 °C
Total Power1020 W
RefrigerantsR404A & R23
Cooling Capacity200 W at −40 °C / 120 W at −60 °C / 60 W at −80 °C
Magnetic Stirring Power50 W
Stirring Speed100–1000 rpm
Ambient Operating Temperature5–35 °C
Max. Relative Humidity≤70%
Power Supply220 V~, 50 Hz
Opening DiameterØ140 mm
Tank DimensionsØ160 × 105 mm (D × H)
Max. Flask Volume Supported500 mL
Tank Material304 Stainless Steel
Overall Dimensions410 W × 610 D × 495 H mm
Net Weight68 kg
Safety ProtectionsDry-run prevention (for heating models), overcurrent, overtemperature, and startup delay protection
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BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Product CategoryDomestic
ModelLT-100-80 Ultra-Low Temperature Circulating Chiller
Instrument TypeIntegrated Unit
Cooling MethodAir-Cooled
Temperature Control Range−80 °C to −40 °C
Refrigeration Capacity2.5–10 kW
Temperature Stability±2 °C
Circulating Pump Pressure1 bar
Circulating Pump Flow Rate30 L/min
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BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Equipment TypeVertical
Temperature Stability±0.2 °C
Operating Temperature Range−20 °C to 99 °C
Bath Opening DiameterØ210 mm
Heating Power1500 W
Bath Volume5 L
External Dimensions (W×D×H)385 mm × 560 mm × 735 mm
Net Weight55 kg
RefrigerantR404A
Refrigeration Capacity570 W at 10 °C, 470 W at 0 °C, 385 W at −10 °C, 230 W at −20 °C
Circulation Pump Flow Rate20 L/min
Max. Pressure0.4 bar
Magnetic Stirring Power50 W
Stirring Speed Range100–1000 rpm
Input Power Supply220 V~, 50 Hz
Protection FunctionsDry-run prevention (heating), overtemperature, overcurrent, leakage current, thermal delay, and overheat safeguards
Ambient Operating Conditions5–35 °C, ≤70% RH
Bath Material304 Stainless Steel
Max. Flask Capacity Supported2000 mL
External Circulation PortRc1/2
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BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Product TypeIntegrated Circulating Chiller
Cooling MethodAir-Cooled
Temperature Control Range−30 °C to +5 °C
Refrigeration Capacity300–1750 W (at −25 °C to 0 °C)
Temperature Stability±2 °C
Circulation Pump Pressure0.4 bar
Circulation Flow Rate20 L/min
Reservoir Volume17 L
Operating ModeContinuous Duty
RefrigerantR410A
Power Supply220–240 V~, 50 Hz
Rated Power1475 W
Rated Current7.8 A
Reservoir Material304 Stainless Steel
Dimensions (W×D×H)465 × 690 × 820 mm
Net Weight80 kg
Ambient Operating Conditions5–35 °C, ≤70% RH
Sensor TypePt100
External PortRc 1/2 internal thread
Fill Opening DiameterØ60 mm
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BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Country of OriginChina
ModelDHJF-8002W
Instrument TypeHorizontal
Temperature Uniformity±2 °C
Operating Temperature Range−80 °C to +10 °C
Bath Opening DiameterØ140 mm
Bath Volume2 L
External Dimensions (W×D×H)410 mm × 610 mm × 495 mm
Net Weight68 kg
RefrigerantsR404A and R23
Magnetic Stirring Power50 W
Stirring Speed Range100–1000 rpm
Cooling Capacity200 W at −40 °C, 120 W at −60 °C, 60 W at −80 °C
Heating ProtectionDry-run prevention (for heated variants)
Safety ProtectionsDelayed startup, overcurrent, and overtemperature protection
Power Supply220 V~, 50 Hz
Ambient Operating Conditions5–35 °C, ≤70% RH
Bath Material304 Stainless Steel
Max Flask Capacity Supported500 mL
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BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Country of OriginChina
ModelDLSB-ZC
Operating Temperature Range (°C)–10 to 25
Ambient Temperature Range (°C)5 to 25
Temperature Stability (°C)±2
Total Power Consumption (W)1650
Electrical Supply220–240 V~, 50 Hz
Reservoir Capacity (L)20
Refrigeration Capacity (W)600–2550
Circulation Pump Power (W)280
Rated Flow Rate (L/min)30
Maximum Output Pressure (bar)1.0
Ultimate Vacuum (MPa)–0.098 (equivalent to 2 kPa absolute)
Number of Vacuum Ports3
Single-Port Pumping Speed (L/min)10
Dimensions (mm)595 W × 475 D × 925 H
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BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Country of OriginChina
ModelLT-100-80
Output Temperature Range−80 °C to −40 °C
Temperature Stability±2 °C
Temperature DisplayDigital
Sensor TypePt100
Safety ProtectionsCompressor Delay Start, High-Pressure, Overload, Overcurrent, Phase Sequence, Liquid Overflow
Rated Input Power19300 W
Rated Current34.5 A
Cooling Capacity10000 W at −40 °C, 6000 W at −60 °C, 2500 W at −80 °C
RefrigerantsR404A & R23
Heat Transfer Fluid Volume24 L
Circulation Pump Power280 W
Flow Rate30 L/min
Max. System Pressure1 bar
Power Supply3-phase, 380 V, 50 Hz
Ambient Operating Temp.5–35 °C
Relative Humidity Limit≤70%
External PortRc 1/2 internal thread
Fluid Fill Opening DiameterØ60 mm
Reservoir MaterialSUS304 stainless steel
Dimensions (W×D×H)867×1475×1598 mm
Net Weight600 kg
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BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Product TypeIntegrated Circulating Chiller
Cooling Capacity680 W at 10°C
Temperature Stability±2°C
Operating Temperature Range−20°C to +25°C
Reservoir Volume5 L
ControllerLCD with Pt100 Sensor (0.1°C Resolution)
RefrigerantR404A
Pump Flow Rate22 L/min (Max), 1.1 bar (Max Pressure)
Power Input220 V~, 50 Hz, 670 W
ProtectionOvercurrent, Overheat, High-Pressure, Ground Fault, Delayed Start
IP RatingIP20
Ambient Operating Conditions5–35°C, ≤70% RH
Reservoir & Piping Material304 Stainless Steel
Evaporator304 Stainless Steel Coil-in-Tank Design
CompressorHermetic Piston Type
CondenserAir-Cooled with Oxygen-Free Copper Finned Tube
Expansion DeviceCapillary Tube
Communication InterfaceRS485 / MODBUS RTU Protocol
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BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Instrument TypeIntegrated Unit
Cooling MethodAir-Cooled
Temperature Range−30 °C to +200 °C
Refrigeration Capacity0.3 kW (at −30 °C) to 1.7 kW (at +200 °C)
Temperature Stability±0.5 °C
Circulation Pump Pressure1 bar
Circulation Flow Rate30 L/min
Reservoir Volume20 L
Operating ModeContinuous Duty
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BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
ModelVT-2000H
Cooling Capacity640 W at −10°C / 400 W at −20°C / 200 W at −30°C / 20 W at −40°C
Minimum No-Load Temperature−40°C
Cooling MethodDirect refrigeration
Temperature DisplayDigital, Pt100 sensor
Setpoint RangeAdjustable within operational range
Safety ProtectionsDelayed start, overcurrent protection, overtemperature cutoff
Dehumidification CapacityUp to 1 kg (water-based systems)
RefrigerantR404A
Trap Chamber DimensionsØ160 × 240 mm
Chamber Material06Cr19Ni10 (AISI 304 stainless steel)
Condenser OptionsStainless steel chamber or optional borosilicate glass cold trap flask
Compatible MediaWater, ethanol (stainless chamber)
Vacuum PortFlexible hose fitting, OD Ø12 mm
Ambient Operating Conditions5–35°C, ≤70% RH
Power Supply220–240 V~, 50 Hz
Input Power819 W
Input Current3.7 A
Overall Dimensions (W×D×H)360 × 590 × 889 mm
Net Weight60 kg
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BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
ModelDLSB-5/20B
Cooling Capacity650 W at 10°C, 580 W at 0°C, 490 W at −10°C, 280 W at −20°C
Temperature Range−20°C to +25°C (ambient ≤35°C)
Temperature Stability±2°C
Temperature Display Resolution0.1°C
RefrigerantR404A (CFC-free, ozone-friendly)
CompressorEmbraco hermetic piston compressor
CondenserAir-cooled finned-tube with oxygen-free copper coil
Evaporator304 stainless steel coiled tube immersed in reservoir
Circulating Pump304 stainless steel shielded pump, leak-proof at low temperatures
Reservoir Volume5 L
Flow Rate20 L/min
Max. Pressure0.4 bar
Power Supply220–240 V~, 50 Hz
Rated Power635 W
ProtectionDelay start, overcurrent, overheat, grounding, high-pressure
Enclosure RatingIP20
Pollution DegreeClass II
Communication InterfaceRS485, MODBUS RTU protocol
Safety CertificationCE compliant
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BrandThe Great Wall
OriginHenan, China
Manufacturer TypeOriginal Equipment Manufacturer (OEM)
Country of OriginChina
ModelDHJF-1205
QuotationUpon Request
Refrigeration SystemSingle-stage compression with cascade sub-cooling technology
Temperature Range−120 °C to −60 °C
Temperature Stability±2 °C
Bath Volume5 L
RefrigerantMixed refrigerant blend
Cooling Capacity110 W at −60 °C
Stirring Power50 W
Stirring Speed100–1000 rpm
Display Resolution0.1 °C
Input Power820 W
Voltage/Frequency220–240 V~, 50 Hz
Bath Material304 stainless steel
External Dimensions (W×D×H)630 × 795 × 790 mm
Net Weight125 kg
Ambient Operating Conditions5–35 °C, ≤70% RH
Drain Port1/2″ BSP
Bath Opening DiameterØ210 mm
Bath Internal DimensionsØ220 × 180 mm
Max Flask Capacity2000 mL
Safety ProtectionsDelayed start, overcurrent, and overtemperature protection
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