Explosion-proof heating and cooling circulator
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  • Explosion-proof heating and cooling circulator
  • Explosion-proof heating and cooling circulator
  • Explosion-proof heating and cooling circulator

Explosion-proof heating and cooling circulator

Explosion-proof heating and cooling circulator achieves precise temperature control of target equipment (such as reaction vessels, storage tanks, etc.) through the coordinated operation of its built-in compressor-based refrigeration system and electric heating system.
  • Product Description
  • Introduction to explosion-proofheating and cooling circulator

    The explosion-proof heating and cooling circulator is an intelligent temperature‑control device specifically designed for flammable and explosive environments. It combines heating, cooling, and circulating temperature‑control functions in a single system and is widely used in industries such as chemical processing, petroleum, pharmaceuticals, new materials, and laboratories. Building on the conventional high‑low temperature integrated unit, this equipment features an optimized explosion‑proof design, enabling safe and stable operation under complex and hazardous conditions, making it one of the key devices in the industrial temperature‑control field.

    

    The explosion-proof heating and cooling circulator achieves precise temperature control of target equipment (such as reaction vessels, storage tanks, etc.) through the coordinated operation of its built-in compressor-based refrigeration system and electric heating system. Its core components typically include explosion-proof motors, explosion-proof electrical control cabinets, and explosion-proof sensors; the entire unit complies with relevant explosion-proof standards, effectively preventing safety incidents caused by electrical sparks. Additionally, the equipment is often constructed from high-quality stainless steel, offering excellent corrosion resistance and making it suitable for a wide range of chemical environments.

    

    Regarding product features, the explosion-proof heating and cooling circulator boasts a wide temperature control range, high precision, and rapid response. The equipment can be freely adjusted between low temperatures (e.g., −80°C) and high temperatures (e.g., 200°C), meeting diverse process requirements for temperature control. Its intelligent temperature control system supports PID regulation, ensuring stable temperature maintenance and minimizing temperature fluctuations. Moreover, the integrated design results in a compact structure with a small footprint, making installation and maintenance more convenient.


    -20℃~200℃ Explosion-proof heating and cooling circulator - Technical Parameters

    Model

    PLYY-20-20EX

    PLYY-20-30EX

    PLYY-20-50EX

    PLYY-20-100EX

    PLYY-20-150EX

    PLYY-20-200EX

    Temperature Range

    -20℃~200℃

    Control System

    PID adaptive control algorithm, PLC programmable controller

    Temperature Control Mode

    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℃

    Material Temperature Control Accuracy

    ±1℃

    Heating power kW

    2.5

    3.5

    5.5

    7.5

    10

    15

    Power
           Cooling
           Capacity
        kW  

    200℃

    2.5

    3.5

    5.5

    7.5

    10

    15

    100℃

    2.5

    3.5

    5.5

    7.5

    10

    15

    50℃

    2.5

    3.5

    5.5

    7.5

    10

    15

    20℃

    2.5

    3.5

    5.5

    7.5

    10

    15

    -5℃

    2

    3

    4.5

    6.6

    8

    12

    -20℃

    1

    1.8

    2.8

    3.8

    4.6

    7

    Circulation pump
           Flow pressure Max

    20L/min
                      2bar

    35L/min
                      2bar

    35L/min
                      2bar

    50L/min
                      2bar

    75L/min
                      2.5bar

    110L/min
                      2.5bar

    Compressor

    Compressors from brands such as Emerson Copeland, Tecumseh, and Dooling

    Expansion valve

    Danfoss/Emerson thermostatic expansion valves

    Evaporator

    Plate heat exchanger

    Control panel

    PLC-controlled 7-inch color touchscreen, with temperature curve display and recording

    Safety protection

    Features self-diagnosis; compressor overload protection; high-pressure switch, overload relay, thermal protection device, and multiple other safety features.

    Sealed system

    The entire system is fully sealed: at high temperatures, no oil mist is produced; at low temperatures, it does not absorb moisture from the air. During operation, the system prevents pressure rise due to high temperatures and automatically replenishes the heat-transfer medium at low temperatures.

    Refrigerant

    R-404A

    Power Supply

    380V 50HZ / 460V 60HZ

    Housing Material

    Cold-rolled steel with powder coating or SUS304 housing

    Optional

    Explosion-proof ExdIIBT4


    Application Scenarios for Explosion-Proof heating and cooling circulator Coupled with Double-Glass Reactors

    Jacketed glass reator and explosion-proof heating and cooling circulator

    In terms of application areas, explosion-proof high- and low-temperature integrated units can be used in scenarios such as reactor temperature control, fine chemical synthesis, production of pharmaceutical intermediates, and testing of new energy materials. For example, during chemical reactions, precise temperature control can enhance reaction efficiency and product quality; in the pharmaceutical industry, it ensures stable synthesis of drugs under specific temperature conditions; and in scientific research experiments, it provides reliable temperature assurance for complex procedures.

    

    Explosion-proof heating and cooling circulator – Detail Images of Some Accessories

    Explosion-proof enclosures, control system displays, branded explosion-proof compressors, explosion-proof condenser fans, plate heat exchangers, expansion valves, dryer filters, etc.;

    Safety is one of the most prominent features of explosion-proof high- and low-temperature integrated units. The equipment typically comes equipped with multiple safety protection functions, including over-temperature protection, over-pressure protection, low-fluid-level alarms, and overcurrent protection, ensuring timely shutdown and alarm notifications in abnormal conditions. Meanwhile, the explosion-proof design covers the electrical system and key components, significantly enhancing the overall operational safety level, making it particularly suitable for petrochemical and hazardous-material production environments.


    Explosion-proof controller and box.jpg

    Core component of heating and cooling circulator.jpg

    External Structural Diagram of the heating and cooling circulator

    Outline drawing of high and low temperature integrated machine.jpg

    Real-life photos of the explosion-proof heating and cooling circulator

    explosion-proof heating and cooling circulator 1

    explosion-proof heating and cooling circulator 2

    When selecting an explosion-proof heating and cooling circulator, users should pay close attention to the equipment’s explosion‑proof rating, temperature control range, cooling capacity, heating power, and control system performance. At the same time, it is essential to choose a manufacturer with the relevant certifications to ensure that the equipment complies with national or industry‑specific explosion‑proof standards and benefits from a comprehensive after‑sales service system. Puli Technology specializes in manufacturing explosion‑proof heating and cooling circulator and stainless‑steel models, all of which come with complete explosion‑proof certificates, reliable quality, and outstanding after‑sales support—trusting us is the right choice.

    

    With its high safety, high precision, and high level of integration, the explosion-proof heating and cooling circulator is gradually becoming the preferred choice for temperature control equipment in hazardous operating environments. As industrial safety standards continue to rise and smart manufacturing develops, this device will enjoy even broader application prospects in the future market.

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Explosion-proof heating and cooling circulator

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