Hanuo ZW-50 Oil-Free Diaphragm Vacuum Pump

Overview

The Hanuo ZW-50 Oil-Free Diaphragm Vacuum Pump is an engineered solution for clean, reliable vacuum generation in regulated laboratory environments. Operating on positive displacement via a precision-machined PTFE-coated diaphragm and stainless steel valve assembly, it delivers consistent suction without lubricating oil—eliminating the risk of hydrocarbon contamination in sensitive filtration, sterilization validation, or analytical sample preparation workflows. Designed specifically for applications requiring inert, particle-free vacuum—such as microbial limit testing (MLT), sterility testing per USP , and membrane filtration of pharmaceuticals, biologics, and environmental samples—the ZW-50 maintains stable flow and pressure control across extended duty cycles. Its sealed, oil-free architecture ensures compliance with GLP and GMP documentation requirements where traceability of vacuum source integrity is critical.

Key Features

• Full stainless steel housing and wetted parts (304 SS) resist corrosion from aggressive solvents, acids, and biological residues—extending service life and preventing particulate shedding into vacuum lines.
• High-efficiency brushless DC motor (100 W nominal power) delivers rated 50 L/min free-air flow at inlet while minimizing thermal drift and enabling continuous operation up to 8 hours without overheating.
• Reinforced nitrile-butadiene rubber (NBR) diaphragm with fatigue-resistant formulation withstands >5 million stroke cycles under load—validated per ISO 8573-1 Class 0 air purity standards for oil-free operation.
• Integrated pressure regulation port supports optional external vacuum controllers or analog pressure switches (0–10 V or 4–20 mA output compatible), enabling closed-loop vacuum setpoint maintenance in automated systems.
• Acoustically damped enclosure achieves ≤52 dB(A) at 1 m distance—meeting ISO 7779 noise emission guidelines for shared lab spaces and laminar flow hoods.

Sample Compatibility & Compliance

The ZW-50 is validated for use with standard 47 mm and 90 mm membrane filters (cellulose acetate, PVDF, PTFE, and nylon), glass fiber funnels, and stainless steel filter holders compliant with ASTM D2974 and ISO 7207-1. Its oil-free design satisfies USP requirements for sterile filtration equipment qualification and aligns with EU Annex 1 (2022) guidance on prevention of cross-contamination in aseptic processing. All electrical components meet CE marking directives (2014/30/EU EMC, 2014/35/EU LVD), and the unit is manufactured under an ISO 9001:2015–certified quality management system. Traceable calibration certificates (vacuum gauge and flow verification) are available upon request for 21 CFR Part 11–compliant audit trails.

Software & Data Management

While the ZW-50 operates as a standalone analog device, its optional pressure sensor interface (part no. ZW-PSI-KIT) enables integration with LabVantage, Thermo Fisher SampleManager, or custom SCADA platforms via Modbus RTU over RS-485. Real-time vacuum level, runtime hours, and motor temperature data can be logged with timestamped metadata for electronic batch records (EBR). Firmware updates—distributed via secure HTTPS portal—include configurable alarm thresholds (e.g., vacuum loss >5 kPa deviation for >30 s) and automatic shutdown protocols to protect connected filtration manifolds.

Applications

• Microbial enumeration and sterility testing per USP , , and using vacuum-assisted membrane filtration.
• Pre-concentration of aqueous environmental samples (e.g., EPA Method 1600) prior to ICP-MS or HPLC analysis.
• Evaporative concentration of protein solutions and cell culture supernatants in cold traps.
• Vacuum desiccation of hygroscopic reference standards in metrology labs.
• Supporting vacuum ovens, freeze dryers, and glove box purge cycles in R&D and QC laboratories.

FAQ

Is the ZW-50 suitable for solvent vapor aspiration?
Yes—its stainless steel and fluoropolymer-wetted materials resist common organic solvents (e.g., ethanol, acetone, ethyl acetate) when used with appropriate cold traps and exhaust ventilation per OSHA 1910.1200.
Does it require periodic oil changes or lubrication?
No—this is a true oil-free diaphragm pump; no lubricants contact the gas path. Maintenance is limited to diaphragm and valve replacement every 12–18 months under typical lab usage.
Can it be mounted vertically or in enclosed cabinets?
Yes—its convection-cooled motor and low surface temperature (<45 °C ambient +25 °C rise) permit installation in ventilated enclosures or inverted orientation without derating.
What certifications accompany shipment?
Each unit ships with CE Declaration of Conformity, RoHS compliance statement, ISO 9001 manufacturing certificate, and factory-verified performance test report (flow vs. vacuum curve, noise spectrum, leakage rate <1.2×10⁻³ mbar·L/s).