Chu Ding Technology SHZ32-50 Stainless Steel Tower-Type Double Distillation Water Still

Overview

The Chu Ding Technology SHZ32-50 Stainless Steel Tower-Type Double Distillation Water Still is a laboratory-grade primary and secondary steam distillation system engineered for the reliable, continuous production of high-purity distilled water. It operates on the principle of double-stage vapor-phase separation: raw feed water is first boiled in a stainless steel boiler; the generated steam passes through a vertical tower column where entrained impurities—including non-volatile ions, organic contaminants, endotoxins, and pyrogens—are separated via gravitational condensation and reflux dynamics. The purified steam then enters a second-stage vapor chamber and undergoes re-evaporation and condensation in an inline water-cooled condenser, yielding re-distilled water meeting stringent pharmacopeial specifications. Designed for sustained operation in pharmaceutical QC labs, clinical diagnostics facilities, and analytical chemistry environments, the unit delivers consistent 50 L/h output with thermal efficiency optimized by its helical heating configuration and minimized carryover risk due to its tower-type geometry.

Key Features

• Full 304 stainless steel construction—welded, polished, and passivated—to ensure long-term resistance to acidic, alkaline, and chloride-rich feed waters
• Helical (spiral) electric heating element providing uniform thermal distribution, reduced scaling, and extended service life compared to conventional tubular heaters
• Tower-type dual-condensation architecture enabling true double distillation without intermediate storage or manual transfer
• Inline vertical water-cooled condenser with high-surface-area copper tubing and regulated coolant flow for stable condensation efficiency
• Integrated pressure-balanced steam extraction path from boiler to tower, minimizing aerosol entrainment and ensuring low conductivity (<1.0 µS/cm) in final product water
• Front-accessible control panel with ON/OFF switch, power indicator, and overheat protection cutoff (thermal cutout at 120 °C)

Sample Compatibility & Compliance

The SHZ32-50 is validated for use with municipal tap water, deionized water, and reverse-osmosis pretreated feed sources. Its output meets the chemical purity requirements defined in the Chinese Pharmacopoeia (2000 Edition), Section 0261 — Purified Water, including limits for nitrates, heavy metals, total organic carbon (TOC), and bacterial endotoxins (when paired with sterile collection protocols). While not certified to ISO 9001 or FDA 21 CFR Part 11 out-of-the-box, the system’s mechanical design supports integration into GLP/GMP workflows: all wetted surfaces are fully traceable (material certs available upon request), and the absence of plastic or rubber components in the distillation path eliminates leachables. Units are supplied with CE-marked electrical safety compliance per IEC 61010-1:2010 for laboratory equipment.

Software & Data Management

This is a standalone electromechanical distillation apparatus with no embedded microprocessor, touchscreen interface, or digital data logging capability. Operational parameters—including runtime, batch volume, and maintenance intervals—are manually recorded by lab personnel. For regulatory traceability in GxP environments, users are advised to pair the unit with external temperature monitoring (e.g., calibrated RTD probe in condensate line) and integrate usage logs into their existing Laboratory Information Management System (LIMS) or electronic lab notebook (ELN). Optional analog chart recorders or 4–20 mA output modules (available via third-party retrofit) may be deployed for continuous steam temperature or condensate flow monitoring.

Applications

• Preparation of solvent-grade water for HPLC mobile phase preparation and UV-Vis spectroscopy blanking
• Feed water supply for ultra-low particulate cleanrooms (ISO Class 5/7) requiring pyrogen-free rinse media
• Reagent preparation in microbiology labs where endotoxin-sensitive assays (e.g., Limulus Amebocyte Lysate test) are performed
• Calibration standard dilution in clinical chemistry analyzers requiring conductivity <1.0 µS/cm and silica <10 ppb
• Supporting ASTM D1193 Type II water specifications when operated with appropriate feed pretreatment and scheduled maintenance

FAQ

What feed water quality is recommended to maximize boiler lifespan and minimize descaling frequency?
Deionized or reverse-osmosis treated water (conductivity 150 ppm CaCO₃ requires monthly acid descaling using citric acid solution (2–5% w/v, 60 °C, 2-hour dwell).
Can this unit produce water compliant with USP Purified Water monograph?
While the SHZ32-50 meets Chinese Pharmacopoeia (2000) criteria, USP Purified Water requires additional controls—including microbial enumeration, nitrate testing, and endotoxin validation—which must be conducted independently by the end user.
Is the condensate collection vessel included with the system?
Yes—a 20-L stainless steel receiving tank with level indicator and overflow drain is supplied as standard. Custom larger-capacity tanks (up to 100 L) are available as optional accessories.
What electrical supply is required for continuous operation?
220 V AC ±10%, 50 Hz, single-phase, 16 A dedicated circuit with grounded outlet and residual-current device (RCD) protection is mandatory.
How often should the boiler gasket and sight glass seal be replaced during routine maintenance?
Under normal operation (8 h/day, 5 days/week), inspect seals quarterly; replace every 12 months or immediately if visible cracking, compression set, or steam leakage is observed.