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-40℃ Low-Temperature Refrigeration Circulator
- Product Description
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Overview of the -40℃ Low-Temperature Refrigeration Circulator
Product Model: PLD-40/20
Temperature Control Range: -40℃ to RT (room temperature)
A low-temperature refrigeration circulator is a recirculating cooling device capable of providing sub-zero temperature environments. Many users, when making a purchase, tend to confuse it with a standard ambient‑temperature chiller. The key difference between the two is that a conventional chiller typically delivers chilled water in the range of 5°C to 35°C, whereas a low-temperature refrigeration circulator, utilizing multi‑stage cascade refrigeration technology, can stably supply cryogenic media at -40°C, -80°C, or even -120°C.
In practical applications, this equipment addresses the need for rapid cooling after high-temperature reactions and the challenge of maintaining precise constant temperatures during low-temperature chemical processes. For example, in the synthesis of pharmaceutical intermediates, the reactor generates intense exothermic heat; if the heat is not removed promptly, it can lead to reduced product yields or even trigger safety incidents. The low-temperature refrigeration circulator, with its closed-loop system, not only ensures the medium remains at low temperatures but also minimizes coolant evaporation and contamination, enabling safe and efficient temperature control.
Buying advice: When selecting a low-temperature refrigeration circulator, in addition to the temperature range, you should pay particular attention to the cooling capacity (in watts) and the pump’s head and flow rate. Cooling capacity determines the rate of temperature reduction, while head indicates how far the cold fluid can be delivered—this is especially important when connecting equipment that is located at a distance or has high flow resistance.
-40℃～RT Ambient Temperature, Low-Temperature Refrigeration Circulator – Technical Specifications
Model
PLD-40/10
PLD-40/30
PLD-40/50
PLD-40/100
PLD-40/150
PLD-40/200
Temperature Range
-40℃～RT
Control System
Fuzzy PID Adaptive Controller, PLC-Programmable Controller
Temperature Control Mode Selection
Material temperature control and equipment outlet temperature control modes are freely selectable
Program Editing
The PLC can be programmed with 5 sequences, each sequence containing up to 40 steps
Communication Protocol
MODBUS RTU protocol, RS485 interface
External Temperature Feedback Input
PT100, 4–20 mA, or communication-based setpoint (default: PT100)
Temperature Feedback
Equipment heat-transfer medium: inlet temperature, outlet temperature, and reactor material temperature (with an external temperature sensor) – three temperature readings
Thermal Fluid Temperature Control Accuracy
±0.5℃
Power
Cooling
Capacity-10℃
1.5KW
3.2KW
4.5KW
6.2KW
8.3KW
12KW
-20℃
1.2KW
2.7KW
3.8KW
5.5KW
7KW
10KW
-40℃
0.4KW
0.75KW
1.15KW
1.5KW
2.1KW
3KW
Circulation pump
Flow, PressureMax20L/min
Max20L/min
Max35L/min
Max35L/min
Max50L/min
Max50L/min
0.7BAR
0.7BAR
1BAR
1BAR
1BAR
1BAR
Compressor
Compressors from brands such as Emerson Copeland, Tecumseh, and Dooling
Evaporator
Plate heat exchanger
Control panel
PLC-controlled 7-inch color touchscreen displays set and measured temperatures
Safety protection
Features self-diagnosis; compressor overload protection; high-pressure switch, overload relay, thermal protection device, and multiple other safety features.
Refrigerant
R-404A/R507C
Power Supply
380V 50HZ / 460V 60HZ
Housing Material
Cold-rolled steel with powder coating or SUS304 housing
Application Industries
1. Pharmaceutical: processes requiring temperature control, such as synthesis, hydrolysis, esterification, and etherification.
2. Chemical: distillation and purification, rubber grinding, cryogenic milling, and chemical synthesis.
3. Metal processing: cryogenic assembly, cryogenic brazing.
4. Food: ultra-low-temperature processing and storage of tuna and other foods.
5. Semiconductor electronics: environmental testing of components, simulated testing of electronic devices.
6. Aerospace: heat sink testing, environmental simulation tests for components, evaporative cooling environment simulation testing.
Working Principle of a Combined High- and Low-Temperature Unit
Low-Temperature Refrigeration Circulator – Partial Component Detail Images
Control System Display, Brand-Name Compressor, Condenser Fan, Plate Heat Exchanger, Expansion Valve, Drying Filter, etc.
External Structural Diagram of the Cryogenic Refrigeration Cycle Unit
Real-Product Photos
Related Products
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