Hanuo SHZ Series Vertical Stainless Steel Circulating Water Vacuum Pump

Overview

The Hanuo SHZ Series Vertical Stainless Steel Circulating Water Vacuum Pump is an oil-free, water-sealed vacuum source engineered for continuous, low-maintenance operation in academic laboratories, chemical synthesis setups, and analytical sample preparation workflows. It operates on the principle of water ring vacuum generation: rotating impeller motion creates a liquid ring inside the pump chamber, forming sealed cavities that expand to draw gas in through inlet ports and compress it before exhausting it to atmosphere. This design eliminates the need for lubricating oil—preventing contamination of sensitive vacuum lines, reaction vessels, or distillation apparatus—and delivers stable vacuum levels up to 0.098 MPa (98 kPa absolute), suitable for rotary evaporation, vacuum filtration, freeze drying pre-evacuation, and inert gas purging protocols.

Key Features

• Vertical modular architecture optimizes floor space usage while enhancing structural rigidity and minimizing vibration transmission.
• Stainless steel housing (AISI 304 standard) ensures long-term resistance to corrosion from organic solvents, acidic vapors, and humid environments.
• Corrosion-resistant internal components—including impeller, volute, and port manifolds—are available in both reinforced polymer (SHZ-CB/95B) and fully stainless steel (SHZ-C/CD/2000) configurations to match application aggressiveness.
• Configurable multi-port manifold system: models offer 3, 5, or up to 10 independent vacuum inlets, each with individual flow control valves and integrated pressure monitoring capability via a centrally mounted analog vacuum gauge.
• Self-contained closed-loop water circulation with built-in reservoir (45–60 L capacity), temperature-stable operation, and optional external chiller interface for extended high-vacuum duty cycles.
• 370 W induction motor with thermal overload protection, rated for continuous 24/7 operation under ambient temperatures ≤40 °C and relative humidity ≤80%.

Sample Compatibility & Compliance

The SHZ Series is compatible with standard laboratory glassware (e.g., Büchner funnels, rotary evaporator condensers, Schlenk lines) and chemically resistant tubing (Tygon®, Viton®, silicone). Its oil-free operation meets ISO 8573-1 Class 0 air purity requirements for vacuum-side cleanliness, supporting applications where hydrocarbon contamination must be avoided—such as GC sample introduction, mass spectrometry interface conditioning, or pharmaceutical crystallization under reduced pressure. While not certified to UL/CE for standalone safety compliance, the unit conforms to IEC 61000-6-3 (EMC emission limits) and incorporates grounding terminals compliant with IEC 60364-5-54. Documentation supports GLP-aligned maintenance logs and traceable calibration of vacuum gauge readings per ASTM D2873.

Software & Data Management

This is a manually operated, analog-control vacuum pump with no embedded firmware or digital interface. Vacuum level is monitored via a calibrated Bourdon-tube analog gauge (±1.5% FS accuracy) mounted on the front panel. For integration into automated systems, optional analog 4–20 mA vacuum transducer outputs (with external signal conditioner) can be installed upon request. All models include a standardized RS-232 serial port for third-party data acquisition modules, enabling time-stamped vacuum logging in LabVIEW™, MATLAB®, or custom Python-based QC dashboards. Audit trails for maintenance intervals and water reservoir replacement are recommended per institutional SOPs aligned with FDA 21 CFR Part 11 principles when used in regulated environments.

Applications

• Routine vacuum filtration of aqueous and organic suspensions using Hirsch or Buchner funnels.
• Rotary evaporation of heat-sensitive compounds (e.g., natural product isolates, polymer precursors) at controlled bath temperatures.
• Pre-evacuation of lyophilizer chambers prior to freezing cycles.
• Vacuum-assisted degassing of solvents and resin mixtures in materials science labs.
• Supporting Schlenk line operations requiring intermittent or sustained sub-atmospheric inert gas purging.
• Environmental testing setups involving controlled-pressure exposure chambers.

FAQ

Is this pump suitable for use with aggressive solvents such as chloroform or concentrated HCl vapor?
Yes—models with fully stainless steel wetted parts (SHZ-C, SHZ-CD, SHZ-2000) are rated for intermittent exposure to halogenated and acidic vapors; however, continuous operation with highly volatile or oxidizing agents requires supplemental cold traps and exhaust scrubbing.
What is the expected service life of the water seal under continuous operation?
With deionized water and biocide additive (e.g., sodium benzoate), reservoir water should be replaced every 72–120 hours depending on ambient temperature and total dissolved solids accumulation; impeller wear is typically negligible over 10,000+ operating hours.
Can multiple SHZ units be manifolded together to increase total vacuum capacity?
Yes—parallel configuration is supported via standardized NPT 1/4″ vacuum fittings; however, shared reservoirs require balanced flow distribution and synchronized startup to prevent backflow-induced priming failure.
Does the pump include automatic water level sensing or dry-run protection?
No—manual visual inspection of the reservoir sight glass is required prior to startup; optional float-switch kits (sold separately) enable interlocked motor cutoff at low-water thresholds.
Are replacement vacuum gauges and port valves available as spare parts?
Yes—Hanuo provides OEM-certified replacements including 0–0.1 MPa analog gauges (part #HG-VA01), PTFE-sealed ball valves (HV-BV05), and stainless steel inlet adapters (HA-IA10), all traceable to material certifications.