AS ONE AS-01 Circulating Water Vacuum Pump

Overview

The AS ONE AS-01 Circulating Water Vacuum Pump is a compact, self-contained laboratory vacuum source engineered for reliable, low-maintenance operation in chemistry, pharmaceutical, and materials science laboratories. It operates on the principle of water-ring vacuum generation: rotating water within the sealed reservoir creates a partial vacuum at the suction ports via centrifugal displacement and vapor pressure differential—enabling continuous evacuation without oil or mechanical compression stages. Designed for ambient-temperature applications requiring moderate vacuum levels (typically up to –0.095 MPa or ~710 Torr), the AS-01 delivers stable suction performance ideal for rotary evaporation, vacuum filtration, distillation setup priming, and degassing of solvents or aqueous solutions. Its all-PP (polypropylene) water reservoir ensures full resistance to common organic solvents, dilute acids, and alkaline reagents—eliminating corrosion concerns associated with metal or glass reservoirs. The pump’s fixed-speed 150 W induction motor provides consistent torque and thermal stability under extended duty cycles, while its dual-suction configuration supports parallel operation of two independent vacuum lines.

Key Features

• Chemically inert polypropylene (PP) reservoir with 10 L capacity—resistant to acetone, ethanol, methanol, HCl (dil.), NaOH (dil.), and other standard lab reagents.
• Dual metal suction nozzles (φ9.5 mm each) with standardized threading for secure hose coupling and leak-free vacuum transfer.
• Integrated vacuum regulator with built-in analog vacuum gauge—enables real-time monitoring and precise manual adjustment of vacuum level via needle valve control.
• Front-mounted drain cock (φ17 mm) and overflow tube (φ17 mm) allow rapid, tool-free reservoir emptying and automatic overfill protection—critical for unattended operation and solvent recovery workflows.
• Compact footprint (330 × 265 × 390 mm) and lightweight design (5.7 kg) facilitate benchtop integration, mobile cart mounting, or shared-lab deployment.
• Includes certified silicone suction tubing (φ6 × φ12 mm, 1 m length) and a Y-connector for flexible multi-port manifold configuration.

Sample Compatibility & Compliance

The AS-01 is compatible with standard laboratory glassware (e.g., Büchner funnels, evaporating flasks, Schlenk lines) and chemically resistant vacuum hoses rated for ≤0.1 MPa negative pressure. Its PP construction conforms to JIS K 6721 (polypropylene material specifications) and meets general requirements for ISO 8573-1 Class 4 compressed air purity when used in non-critical vacuum applications. While not intrinsically rated for explosive atmospheres or high-purity gas handling, it satisfies routine GLP-compliant vacuum tasks where trace hydrocarbon contamination must be avoided—making it suitable for USP compounding support, QC sample preparation, and teaching lab environments. No CE, UL, or FDA listing applies, as it functions solely as a utility device—not a medical or process-critical system.

Software & Data Management

The AS-01 is a manually operated, analog instrument with no embedded microcontroller, digital interface, or data logging capability. Vacuum regulation is performed mechanically via the integrated PT1/8-threaded needle valve and calibrated analog gauge—ensuring operational simplicity, electromagnetic immunity, and long-term calibration stability without firmware dependencies. This architecture aligns with laboratories maintaining legacy equipment fleets or adhering to minimal validation requirements (e.g., Annex 11 pre-qualification assessments). For audit readiness, users may document operating parameters—including gauge reading, run duration, and reservoir refill intervals—in paper-based or electronic lab notebooks compliant with 21 CFR Part 11 when paired with validated ELN platforms.

Applications

• Vacuum-assisted gravity filtration using sintered glass or membrane filters.
• Routine solvent removal during rotary evaporation of heat-sensitive compounds.
• Deaeration of casting resins, adhesives, or coating formulations prior to curing.
• Support vacuum for cold traps in fractional distillation setups.
• Evacuation of desiccators and vacuum ovens during moisture content analysis (ASTM D1557, ISO 15512).
• Undergraduate and graduate teaching labs requiring robust, safe, and intuitive vacuum sources.

FAQ

What is the maximum achievable vacuum level with the AS-01?
At 25°C ambient temperature, the AS-01 typically achieves –0.095 MPa (approximately 710 Torr) under optimal conditions—dependent on water temperature, ambient humidity, and hose integrity.
Can the AS-01 be used with corrosive vapors such as HCl or Cl₂?
No. While the PP reservoir resists liquid-phase dilute acids, the pump is not designed for continuous exposure to aggressive vapors; condensable or reactive gases may degrade internal seals or contaminate the water loop.
Is the included silicone tubing autoclavable?
Standard medical-grade silicone tubing (Shore A 50) supplied with the AS-01 is autoclavable at 121°C for up to 20 cycles; however, repeated sterilization may reduce elasticity and vacuum seal integrity over time.
Does the unit require regular oil changes or filter replacements?
No. As a water-sealed pump with no lubricated moving parts, maintenance is limited to periodic reservoir cleaning, water replacement, and inspection of the drain cock O-ring.
Can multiple AS-01 units be daisy-chained for higher flow capacity?
Not recommended. Parallel connection of independent water pumps introduces pressure imbalance and flow instability; for increased capacity, select a single larger-capacity model (e.g., AS-02 or equivalent).