-70°C ~ +250°C Hermetic Refrigerating Heating Circulator, Sample temperature controlled, Dynamic temperature control system

-70°C ~ +250°C Hermetic Refrigerating Heating Circulator, Sample temperature controlled, Dynamic temperature control system

PRODUCT MODEL: HRHC Series -70°C ~ +250°C Category: Tag:


HRHC series Hermetic Refrigerating & Heating Circulator (Dynamic Temperature Control systems) can be connect for Reactor Systems Autoclaves, Pilot Systems, Mini Plant Systems, Scale up for Operational Development, Double wall reactors, Advanced-Flow Reactors, Distillation Systems, Material Testing, Combinational Chemistry, Semi conductor Industry, Vacuum Chambers.

Advantages & Functions

  1. Hermetic circulation system make sure high accuracy of temperature and extend life time of circulating liquid.
  2. Widely working temperatures range from -100°C to +350°Cwithout cooling fluid change
  3. Intelligent PID temperature control
  4. High stability and reproducibility of process
  5. Adopted plate heat exchanger, heating pipeline to improve rate of heating & cooling
  6. Widely cooling power range from 0.5 to 500 kW
  7. Brilliant 4 inch, 7 inch, 10 inch TFT touch screen with graphic display can be choose.
  8. Comprehensive warning and safety functions
  9. Rapid cooling down from high temperature (from 300°C).
  10. Control software is available which can communication in 200 meter distance. (Optional)
  11. Incredibly compact

Structure design

A fully closed piping design, high efficiency plate heat exchanger used to reduce the demand for the thermal fluid utilization while providing the system to achieve the rapid ups and downs in temperature The whole system is a closed liquid circulation system with a expansion of container, expansion of the container and the liquid circulation is adiabatic, it will not in liquid circulation, only mechanical connection, regardless of the temperature is a high temperature or low temperature, the tank temperature is limited to 60°C. The advantages by this design:

  1. Only the heat conduction medium in the expansion container touches the oxygen in the air. (The container temperature is limited to 60°C), therefore, during the process the risk of imbibing and volatilization of the heat conducting medium is reduced.
  2. No volatilization of the heat conducting medium at high temperature.
  3. No need to change the heat conducting medium. Continuous control the temperature range to -80°C~190°C, -70°C~220°C, -88°C~170°C, -55°C~250°C, -30°C~300°C without rising the pressure.

Display function

  1. All the kind of process control temperatures.
  2. Liquid level of the heat conducting medium in the expansion vessel.
  3. Indication working status of refrigeration system.
  4. Indication working status of heater.
  5. Indication working status of circulation pump.
  6. Temperature control mode (materials and heat transfer medium).
  7. Temperature upper limit and lower limit can be set.
  8. Temperature difference between jacket & reactor material can be set.
  9. Alarm when liquid is empty.
  10. Refrigeration compressor can be set to operate manually or automatically.
  11. Clear temperature curve displayed, it can be zoom and exported to computer.
  12. Recipe procedure set display
  13. Alarm note display

Principle of process control

Change the control settings of the method, the response as soon as possible in the process of the system lags behind, be the smallest system overshoot. Controlled by two PID (PID is a variable in each group) control loop structure, known as the two sets of control loops: the main circuit and from the circuit, the main control loop from the loop output as the settings. System with feed forward with PV, the master PID loop operation results of the PV output and feed forward signals  as the composite of the settings from the control loop, through such control of the temperature gradient to ensure the accuracy of temperature control system.


High repeatability of results control


Circulation Pump
High temperature resistant low tempera  ture magnetic drive pump or a leak-free high and low temperature shield-driven pump, reduce the risk of system leakage. At the same time the system has the advantages of low noise and big traffic flow.


Electronic expansion valve

Wide temperature range of dynamic temperature control system with electronic expansion valve produced by Emerson company, It can monitor and adjust the number of steps (0~750 Steps / minute) into the motor, precise control the liquid volume from the refrigerant , Improve control accuracy.

Configuration software (Optional)

All dynamic temperature control system HRHC-Series can be connected with the computer.
You can install and record the picture of display on the computer via the configuration software.

  1. Communication distance less than 200m.
  2. Easily temperature setting
  3. Real time control screen
  4. Curve Records
  5. Program selection
  6. Alarm screen recording

Safety protection

Many additional features to ensure the safe operation of the system. For the operation to run not normally appear in the alarm in time and displayed on the touch screen. Phase sequence, leakage protection, refrigeration system high and low voltage protection, overload the pump, compressor overload, high and low level, two independent over-temperature protection, water protection, protection of the circulation line shut.

Connecting Pipe


Temp. range

Interface port

Fluorine rubber hose


Φ12*16  Φ16*22  Φ20* 26

Metal insulation pipe


DN15  DN20  DN25  M24*1.5  M30*1.5  M38*1.5


Date interface & software

Standard configuration:

  1. Inputs of PT100 temperature sensor
  2. USB data export interfaces
  3. RS485 interface (MODBUS protocol)
  4. Alarm contact output

Heat Conduction Medium

It is important to choose the suitable heat conduction medium, to make sure that system works stably. To choose the suitable medium according to the working temperature of the system is essential.

The package kinds of LABFREEZ heat conduction medium are 10L, 25L, 30L, 200L. when ordering the heat conduction medium, the heat conduction medium for constant temperature control system, channel, and external circulation equipments.


  1. Inputs of 4 ~ 20mA temperature measurement
  2. Inputs of 4 ~ 20mA temperature setting
  3. Ethernet interface
  4. RS232 interface (MODBUS protocol)
  5. Computer operating software (Must be fitted with Ethernet interface)
  6. External control box with touch screen display

Common Specifications:

  • Control mode: Feed forward PID, PLC control
  • Temperature control: Temperature of material and circulation liquid can be controlled and set
  • Program:20 group programs, 45 segments for each group
  • Protocol: MODBUS RTU / RS 485 Interface
  • Temp. sensor: Circulation medium PT100, raw material PT100 (3 measuring points) 4~20mA (Optional)
  • Control panel: 7 inches color touch screen, temperature curve display & record
  • Safety: With self-diagnosis function; freezer overload protection; high-pressure switch, a variety of security features overload relays, thermal protection devices.
  • Closed loop system: Fully closed system, no oil mist at high temperature, low temperature do not absorb moisture in the air, the system does not increase the pressure because the high temperature, low temperature heat transfer medium in automatic replenishment operation.


 -70°C~250°C Laboratory

Model HRHC-725W HRHC-735 HRHC-755 HRHC-775 HRHC-7A10W HRHC-7A15W
Medium temperature range -70°C ~ +250°C
Control System Feedforward PID, model-free self-tree building algorithm, PLC controller
Temperature control mode selection Material temperature control and equipment outlet temperature control modes can be freely selected
Temperature difference control The temperature difference between the outlet temperature of the equipment and the temperature of the reaction material can be controlled and set
Program editor 5 programs can be programmed, each program can be programmed with 40 steps
letter of agreement MODBUS RTU protocol RS 485 interface
External access temperature feedback PT100 or 4 ~ 20mA or communication given (default PT100)
Temperature feedback Equipment heat transfer medium inlet temperature, outlet temperature, reactor material temperature (external temperature sensor) three-point temperature
Heat transfer medium temperature control accuracy ±0.5°C
Reaction material temperature control accuracy ±1°C
Heating power kW 2.5 3.5 5.5 7.5 10 15
Cooling capacity kW AT 250°C 2.5 3.5 5.5 7.5 10 15
100°C 2.5 3.5 5.5 7.5 10 15
20°C 2.5 3.5 5.5 7.5 10 15
-60°C 0.4 0.55 0.75 0.9 1.2 2.8
Flow pressure max L/min bar 20 35 35 50 60 110
2 2 2 2 2.5 2.5
Circulating pump Magnetic Drive Pump
Compressor France Tecumseh/Emerson Copeland Scroll Flexible Compressor
Expansion valve Danfoss/Emerson Thermal Expansion Valve + Emerson Electronic Expansion Valve
Evaporator Danfoss/High Force Plate Heat Exchangers
Operation panel 7-inch color touch screen, temperature curve display and record
Security It has self-diagnosis function; freezer overload protection; high pressure pressure switch, overload relay, thermal protection device and other safety protection functions.
Closed circulation system The whole system is a fully closed system, there will be no oil mist at high temperature, no moisture in the air will be absorbed at low temperature, the system will not increase the pressure due to high temperature during operation, and the heat transfer medium will be automatically supplemented at low temperature.
Refrigerant R-404A/R23
Connection size G1/2 G3/4 G3/4 G1 G1 G1
Water-cooled W 900L/H 1200L/H 1800L/H 2300L/H 3200L/H 4500L/H
Temperature 20 degrees 1.5bar ~ 4bar 1.5bar ~ 4bar 1.5bar ~ 4bar 1.5bar ~ 4bar 1.5bar ~ 4bar 1.5bar ~ 4bar
G1/2 G3/4 G3/4 G3/4 G1 G1 1/8
Water cooling size cm 50*85*135 55*100*175 55*100*175 70*100*175 70*100*175 80*120*185
Air cooling size cm / 70*100*175 70*100*175 70*100*175 / /
Weight kg 190 275 320 370 370 420
Power supply 380V 50HZ 5.2kW 220v 8kW 11kW 15kW 20kW 28kW

Typical Application

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