ZiQi SHZ-95A Five-Port Circulating Water Vacuum Pump

Overview

The ZiQi SHZ-95A Five-Port Circulating Water Vacuum Pump is an oil-free, water-cooled vacuum generation system engineered for continuous, stable operation in academic laboratories, pharmaceutical R&D facilities, and chemical synthesis environments. Unlike mechanical or diaphragm vacuum pumps, the SHZ-95A employs a centrifugal impeller-driven circulating water principle: water serves both as the sealing medium and heat sink, enabling reliable vacuum generation without lubricants or hydrocarbon contamination. Its design conforms to fundamental requirements for solvent recovery systems—particularly when paired with rotary evaporators, vacuum filtration manifolds, or multi-vessel reaction setups. The pump achieves an ultimate vacuum of 0.098 MPa (equivalent to ~740 mmHg), sufficient for most low-to-medium vacuum applications including distillation, degassing, and vacuum drying under ambient conditions.

Key Features

• Five independently controllable vacuum ports allow simultaneous connection to multiple apparatuses—e.g., three rotary evaporators and two filtration flasks—without cross-contamination or pressure interference.
• Modular port configuration supports both isolated operation and parallelized vacuum distribution via optional PP five-way manifold (not included), increasing effective total air displacement up to 50 L/min under balanced load conditions.
• All wetted components—including suction nozzles, check valves, and three-way fittings—are fabricated from chemically resistant polypropylene (PP); the water reservoir is constructed from rigid PVC, while the outer housing uses brushed stainless steel (AISI 304) for corrosion resistance and structural rigidity.
• Integrated 50 L water reservoir minimizes refill frequency during extended operation; built-in water level indicator and overflow protection prevent dry-run damage.
• Thermally optimized 370 W induction motor delivers consistent torque across variable backpressure conditions, with IP54-rated enclosure for dust and splash resistance in standard lab environments.

Sample Compatibility & Compliance

The SHZ-95A is compatible with aqueous, polar organic, and mildly acidic/alkaline solutions commonly used in extraction and purification workflows. It is not recommended for use with halogenated solvents (e.g., chloroform, DCM), strong oxidizers (e.g., nitric acid fumes), or high-boiling-point solvents (>150 °C) due to thermal and material compatibility constraints. While not certified to UL/CE standards out-of-the-box, its construction adheres to general laboratory safety principles outlined in ISO 15195 (laboratory equipment—general requirements) and aligns with GLP-compliant infrastructure where vacuum stability and traceability are documented manually. Users deploying this unit in regulated environments should implement periodic calibration of vacuum gauges and log operational parameters (duration, temperature rise, water level) for audit readiness.

Software & Data Management

The SHZ-95A operates as a standalone analog device with no embedded microcontroller or digital interface. Vacuum output is manually regulated via individual brass needle valves at each port; real-time pressure monitoring requires external analog or digital vacuum gauges (e.g., capacitance manometers or Pirani sensors). For integration into automated workflows, third-party pressure controllers (e.g., MKS Instruments 640 series) can be installed downstream with analog 0–10 V or 4–20 mA feedback loops. No proprietary software is provided; however, the pump’s mechanical simplicity ensures long-term serviceability and compatibility with legacy lab control systems using standard relay I/O.

Applications

• Rotary evaporation of heat-sensitive compounds (e.g., natural product isolates, peptides) requiring gentle vacuum control across multiple flasks.
• Vacuum-assisted gravity filtration of crystalline precipitates or catalyst slurries in synthetic organic chemistry.
• Evacuation of Schlenk lines during inert-atmosphere manipulations, especially when combined with auxiliary cold traps.
• Supporting vacuum ovens and desiccators in materials science labs performing moisture content analysis per ASTM E1216 or USP <731>.
• Providing negative pressure for membrane filtration systems in environmental water testing (e.g., EPA Method 1600).

FAQ

Can the SHZ-95A be used with volatile organic solvents like acetone or ethanol?

Yes—provided condensation traps are installed upstream and water temperature is maintained below 25 °C to minimize vapor entrainment and reservoir saturation.
Is the pump suitable for continuous 24/7 operation?

It is rated for intermittent duty cycles (max. 8 h/day); prolonged unattended use requires scheduled water replacement and temperature monitoring to prevent cavitation or thermal drift.
Does it meet FDA 21 CFR Part 11 requirements?

No—the unit lacks electronic audit trails, user authentication, or data logging capabilities required for Part 11 compliance; it functions as a utility-grade component within larger validated systems.
What maintenance intervals are recommended?

Inspect impeller clearance and valve integrity every 6 months; replace reservoir water weekly if operating >4 h/day; clean PP/PVC surfaces with 70% isopropanol to prevent biofilm accumulation.
Can vacuum level be digitally controlled or recorded?

Not natively—but analog vacuum transducers with RS-485 or USB outputs can be retrofitted for real-time logging in LabVIEW or MATLAB-based acquisition platforms.