HUXI SHB-IIIA Circulating Water Vacuum Pump

Overview

The HUXI SHB-IIIA Circulating Water Vacuum Pump is an oil-free, water-cooled vacuum source engineered for reliable and continuous operation in academic, pharmaceutical, chemical, and food science laboratories. It operates on the principle of water-jet aspiration—using recirculated deionized or tap water as both working fluid and coolant—to generate stable negative pressure without lubricants or hydrocarbon contamination. Unlike mechanical rotary vane pumps, this design eliminates oil backstreaming, vapor emissions, and maintenance associated with oil changes, making it especially suitable for applications requiring clean vacuum environments, such as solvent evaporation, rotary evaporation, vacuum filtration, and low-temperature crystallization. Its integrated dual-function architecture simultaneously supplies vacuum and recirculated cooling water to reaction apparatuses—e.g., condensers or jacketed reactors—enhancing thermal management efficiency during distillation or reflux processes.

Key Features

• Four independent vacuum ports with dual analog vacuum gauges—enabling simultaneous multi-vessel operation or selective port isolation for flexible experimental setup.
• Stainless steel motor shaft core ensures long-term dimensional stability and resistance to corrosion under humid operating conditions.
• Custom-engineered fluid silencer reduces entrained air in circulating water, improving vacuum stability and minimizing cavitation-induced noise—typical sound pressure level ≤ 52 dB(A) at 1 m distance.
• Monolithic ABS engineering plastic housing provides structural rigidity, low electrical impedance, and inherent resistance to oxidation, organic solvents, and atmospheric aging.
• Optimized hydraulic path geometry and impeller design deliver consistent 80 L/min free-air displacement across ambient inlet pressures (101.3 kPa) while maintaining ultimate vacuum performance of ≤ 2 kPa absolute (0.098 MPa gauge).
• Integrated water-level sensor and thermal cutoff protection prevent dry-run damage and overheating—compliant with IEC 61000-6-2 electromagnetic immunity requirements.

Sample Compatibility & Compliance

The SHB-IIIA is compatible with standard laboratory glassware (e.g., Büchner funnels, Claisen adapters, rotary evaporator chills) and supports vacuum levels appropriate for aqueous and moderately volatile organic systems (e.g., ethanol, acetone, ethyl acetate). It meets general-purpose laboratory safety standards per GB/T 22987–2008 (Chinese national standard for circulating water vacuum pumps) and incorporates grounding continuity and insulation resistance features aligned with IEC 61010-1:2010 for electrical safety in measurement/control equipment. While not certified for hazardous area use (ATEX/IECEx), its oil-free construction supports GLP-compliant documentation workflows where trace hydrocarbon contamination must be excluded from analytical sample pathways.

Software & Data Management

This unit operates as a standalone analog device with no embedded microcontroller or digital interface. Vacuum output is monitored via dual calibrated Bourdon-tube gauges (0–0.1 MPa range, Class 1.6 accuracy per ISO 8503-1), enabling manual logging for audit trails. For integration into automated lab environments, optional external pressure transducers (e.g., 4–20 mA output sensors) may be plumbed into the vacuum manifold, allowing data acquisition via SCADA or LIMS platforms compliant with FDA 21 CFR Part 11 when paired with validated electronic record systems.

Applications

• Vacuum-assisted filtration of fine particulates in pharmaceutical QC testing.
• Rotary evaporation of heat-sensitive natural product extracts under controlled sub-atmospheric conditions.
• Simultaneous vacuum drying of multiple ceramic crucibles in materials science labs.
• Coolant circulation to Liebig condensers during fractional distillation of binary solvent mixtures.
• Providing stable suction for solid-phase extraction (SPE) manifolds in environmental residue analysis.
• Supporting vacuum desiccation protocols in microbiology and cell culture facilities where sterility and hydrocarbon-free air are critical.

FAQ

Is the SHB-IIIA suitable for use with aggressive solvents such as chloroform or concentrated acids?
The pump housing and wetted components are chemically resistant to water-miscible organics and dilute inorganic solutions; however, prolonged exposure to halogenated solvents or strong oxidizers is not recommended. Consult the material compatibility chart for ABS, silicone gaskets, and stainless steel before extended use.
Can tap water be used continuously without scale buildup?
Yes—provided local water hardness is below 200 ppm CaCO₃ equivalent. For hard-water regions, periodic descaling with 5% citric acid solution (every 100 operating hours) is advised to maintain flow efficiency and vacuum stability.
Does the unit require annual calibration?
No formal recalibration is mandated, but gauge verification against a NIST-traceable reference manometer is recommended semiannually in regulated environments to ensure data integrity per ISO/IEC 17025 guidelines.
What is the expected service life under typical lab usage?
With routine maintenance (bearing lubrication every 2,000 hours, impeller inspection annually), the motor and pump assembly demonstrate ≥ 8 years of functional service life based on accelerated life testing per IEC 60068-2-64.