Great Wall SY-50 High-Temperature Circulating Bath

Overview

The Great Wall SY-50 High-Temperature Circulating Bath is a precision-engineered thermal management system designed for stable, continuous delivery of heated heat-transfer fluids—such as silicone oil, glycol-water mixtures, or specialized synthetic heat transfer media—to external process equipment. Operating on the principle of forced convection via a sealed, pressurized circulation loop, the SY-50 maintains consistent thermal output across demanding industrial and laboratory applications where precise temperature control and long-term fluid integrity are critical. Unlike open-bath systems, its fully enclosed circulation architecture minimizes oxidation and thermal degradation of heat-transfer media, extending service life and reducing maintenance frequency. The unit is widely deployed in pharmaceutical reaction calorimetry, pilot-scale chemical synthesis, polymerization process support, and materials testing setups requiring sustained elevated temperatures up to 200 °C with minimal drift.

Key Features

• Robust stainless steel circulation path—including pump housing, tubing interface, and internal reservoir—engineered for corrosion resistance, high-temperature stability, and compatibility with aggressive heat-transfer fluids.
• PID-based digital temperature controller with real-time setpoint adjustment, ramp/soak programming capability, and intuitive LED interface for repeatable thermal profiles.
• Dual-mode circulation architecture supporting both internal bath recirculation and external closed-loop heating of reactors, jacketed vessels, or analytical instrumentation.
• Integrated over-temperature safety cutoff with audible and visual alarm, independently monitored by redundant thermal sensors to ensure compliance with IEC 61000-6-2 electromagnetic compatibility and basic functional safety requirements.
• High-efficiency 370 W circulation pump delivering up to 42 L/min at 2.8 bar pressure—sufficient to overcome typical pressure drops in 10–15 m external loops with standard 3/4″ NPT connections.
• Thermally insulated stainless steel flexible hose (2 m length, 3/4″ fittings) included as standard, minimizing conductive losses during external heat transfer operations.

Sample Compatibility & Compliance

The SY-50 accommodates a broad range of thermally stable heat-transfer fluids approved for use in regulated environments, including USP-grade silicone oils (e.g., Dow Corning 200 Fluid), polyalphaolefin (PAO)-based synthetics, and inhibited ethylene glycol/water blends. Its construction meets ISO 9001 manufacturing quality standards and conforms to CE marking directives for electrical safety (EN 61000-6-3, EN 61000-6-4) and low-voltage equipment (2014/35/EU). While not certified for GMP or FDA 21 CFR Part 11 compliance out-of-the-box, the device supports audit-ready operation when integrated into validated workflows—its temperature logging capability (via optional RS485 or analog 4–20 mA output) enables traceable data capture compatible with LabVantage, DeltaV, or custom SCADA platforms under GLP/GMP-aligned procedures.

Software & Data Management

The SY-50 features an embedded microcontroller with non-volatile memory storing up to 10 user-defined temperature programs, each configurable with ramp rates, dwell times, and maximum hold durations. Optional communication modules (RS485 Modbus RTU or 4–20 mA analog output) permit integration into centralized monitoring systems for remote setpoint control, real-time temperature telemetry, and automated event logging. All temperature readings are sampled at 1 Hz resolution and digitally filtered to suppress transient noise. Audit trails—including power-on events, setpoint changes, and alarm activations—are timestamped and retained for ≥30 days in volatile memory; persistent storage requires external data acquisition hardware. No proprietary software is required for basic operation, though configuration utilities are available for Windows-based commissioning and firmware updates.

Applications

• Heating and temperature stabilization of glass-lined or stainless-steel jacketed reactors in fine chemical and API synthesis.
• Thermal conditioning of viscometers, rheometers, and differential scanning calorimeters requiring stable bath temperatures above 100 °C.
• Process validation support for sterilization cycle development, including steam-in-place (SIP) pre-heating and hold-phase simulation.
• Materials testing per ASTM D3418 (DSC), ISO 3146 (melting point), and ASTM D1505 (density gradient columns) where precise, sustained thermal gradients are essential.
• Calibration of temperature-sensitive sensors and transmitters in metrology labs operating under ISO/IEC 17025-accredited conditions.

FAQ

What is the maximum allowable operating temperature for the SY-50?

The SY-50 is rated for continuous operation from ambient +5 °C up to 200 °C. Sustained use above 180 °C requires verification of heat-transfer fluid thermal stability and periodic inspection of O-rings and pump seals.

Can the SY-50 be used with water as the circulating medium?

Water is not recommended above 95 °C due to vapor pressure limitations and risk of cavitation; use only high-boiling-point, oxidation-inhibited heat-transfer fluids for operation above 100 °C.

Is external temperature feedback supported for cascade control?

Yes—the unit accepts an external PT100 input (optional accessory) to enable process temperature feedback mode, allowing direct control of reactor jacket temperature rather than bath setpoint.

What maintenance intervals are recommended for optimal performance?

Inspect fluid level and clarity monthly; replace heat-transfer fluid every 12–24 months depending on thermal load history and fluid analysis results; clean filter screen quarterly; verify calibration annually using NIST-traceable reference thermometer.

Does the SY-50 comply with explosion-proof requirements for hazardous areas?

No—the SY-50 is rated for general-purpose indoor laboratory and industrial use (IP20 enclosure rating) and is not certified for Class I Div 1, ATEX, or IECEx hazardous location deployment.