Refrigerated heating circulator HRHC-425W-2T N

for high temperatures

Product
Hermetic Refrigerating & Heating Circulator (HRHC series) with dynamic temperature control for precise material and circulation liquid temperature management.

Application
Designed for integration with reactors, autoclaves, pilot and mini-plant systems, double-wall and flow reactors, distillation setups, material testing rigs, combinatorial chemistry, semiconductor processes and vacuum chambers.

Advantages & Functions

• Fully hermetic circulation minimizes contamination and extends heat-transfer fluid life.
• Wide working temperature ranges available depending on model/configuration (examples: -100°C to +350°C potential ranges).
• Intelligent feedforward PID temperature control for high stability and repeatability.
• Plate heat exchanger and optimized heating pipeline for improved heating/cooling rates.
• Cooling capacity spectrum from fractional kW up to several hundred kW across the series (approx. 0.5–500 kW depending on model).
• Optional TFT touch displays (4", 7", 10") with graphical curve display and export.
• Comprehensive alarms and safety functions; rapid cool-down capability from high temperatures.
• Optional remote communication and monitoring via computer interface (up to ~200 m with appropriate configuration).
• Compact footprint relative to available capacity.

Structure design
Closed-loop liquid circulation with expansion vessel; high-efficiency plate heat exchanger reduces required thermal fluid volume and enables fast temperature transitions. Expansion vessel is temperature-limited so only its medium contacts air, reducing volatilization and risk. Many continuous control ranges are possible without changing the heat transfer medium or increasing system pressure (examples: -80°C~190°C, -70°C~220°C, -88°C~170°C, -55°C~250°C, -30°C~300°C depending on configuration).

Key structural advantages

• Only expansion vessel medium interfaces with air (vessel temperature limited, typically ≤ ~60°C), reducing evaporation risk.
• No volatilization of heat transfer fluid at high operating temperatures.
• Reduced need for frequent fluid replacement across broad temperature ranges.

Display function

• Displays process temperatures for all control points.
• Shows expansion vessel liquid level and refrigeration/heater/pump status.
• Selectable temperature control modes for material and heat-transfer medium; set upper/lower limits and jacket-to-material differential.
• Empty-liquid alarm and manual/automatic compressor operation options.
• Temperature curve display with zoom and export; recipe/program selection and alarm logs.

Principle of process control
Dual-loop PID architecture (main loop + secondary loop) with feedforward. Main loop output combined with feedforward establishes secondary loop setpoints to tightly control gradients and minimize overshoot and lag.

Circulation pump
High-temperature-resistant magnetic drive or shield-driven leak-free pumps reduce leakage risk, operate with low noise and provide flows suitable for process circulation requirements.

Electronic expansion valve
Wide-range dynamic refrigerant control is achieved using electronic expansion valves (example vendor: Emerson) with step motor control for fine refrigerant flow adjustment and improved regulation accuracy.

Configuration software (optional)

• Computer connection for installation, real-time display and recording.
• Communication range up to ~200 m with suitable interface.
• Facilitates temperature programming, curve records, program selection and alarm logging.

Safety protection
Multiple protections including self-diagnostics, compressor high/low voltage protection, pump/compressor overload protection, high/low liquid level alarms, independent over-temperature protections, phase protection and circulation-line shutoff protection.

Connecting pipe
Typical connections and temperature suitability:

• Fluorine rubber hose: -30°C to 200°C — sizes Φ12*16, Φ16*22, Φ20*26.
• Metal insulated pipe: -60°C to 250°C — sizes DN15, DN20, DN25, M24*1.5, M30*1.5, M38*1.5.

Data interface & software (standard)

• PT100 inputs for temperature sensors.
• USB data export.
• RS485 (MODBUS RTU) interface available; alarm contact output.

Heat conduction medium
Selection depends on working temperature for stable operation. Typical packaging options for manufacturer fluids: 10 L, 25 L, 30 L, 200 L.

Optional

• 4–20 mA temperature measurement input.
• 4–20 mA temperature setpoint input.
• Ethernet interface, RS232 (MODBUS) interface.
• Computer operating software (requires Ethernet) and external control box with touch display.

Common specifications

• Control mode: Feedforward PID, PLC control.
• Temperature control: independent control and setpoints for material and circulation liquid.
• Program capability: up to 20 programs, up to 45 segments per program.
• Protocol: MODBUS RTU via RS485.
• Sensors: PT100 for circulation medium and material (standard 3 measuring points); 4–20 mA optional.
• Control panel: 7" color touch screen with curve display and recording (other sizes optional).
• Safety devices: self-diagnosis, overload protections, high-pressure switch, overload relays, thermal protection.
• Closed loop design to avoid oil mist at high temperatures and moisture ingress at low temperatures; some models support automatic replenishment of heat transfer medium.

Laboratory example specifications
Medium temperature range example: -40°C to +200°C; control = Feedforward PID with PLC; heat-transfer medium control accuracy typically ±0.5°C; material temperature accuracy typically ±1°C; heating power examples per model: 2.5 kW to 10 kW; cooling capacity and flow/pressure vary by model and temperature.

Industrial example specifications
Industrial models examples: HRHC-4A25W, HRHC-4A38W, HRHC-4A60W, HRHC-4A95W, HRHC-4A130W. Typical range: -45°C to +250°C; control accuracy ~±1°C; heating powers scale from tens to hundreds of kW on larger models; options for water-cooled or air-cooled condensers; case material commonly stainless steel (SUS304).

Notes
Technical description of HRHC series features and configurations. No commercial contact details or external URLs are included.