GAST DOA-P504-BN Oil-Free Diaphragm Vacuum Pump

Overview

The GAST DOA-P504-BN is a compact, oil-free diaphragm vacuum pump engineered for precision and reliability in laboratory and light industrial applications. Utilizing a sealed, corrosion-resistant PTFE-coated diaphragm and stainless-steel valve assembly, it generates vacuum via positive displacement without lubricating oil—eliminating risk of sample contamination, oil backstreaming, or maintenance-intensive oil changes. Its dual-function design supports both vacuum generation (down to –80 kPa) and low-pressure positive air delivery (up to 4.2 bar), making it suitable for filtration, aspiration, degassing, solvent evaporation, and inert gas purging. The pump operates on a single-phase 220 V / 50 Hz AC motor with thermal overload protection, ensuring stable performance under continuous duty cycles typical in QC labs, academic research settings, and analytical instrument support systems.

Key Features

• Oil-free operation ensures clean, hydrocarbon-free vacuum—critical for sensitive applications including HPLC sample preparation, lyophilization pre-vacuum stages, and cell culture hood evacuation.
• Integrated pressure gauge and adjustable pressure regulator enable real-time monitoring and precise control of both vacuum and positive pressure output.
• Low-noise design (<50 dB[A] at 1 m) facilitates use in shared lab environments without acoustic interference; rubber isolation feet further reduce vibration transmission.
• Compact footprint (193 × 165 × 271 mm) and integrated carrying handle support benchtop mobility and integration into portable analytical platforms or field-deployable systems.
• Corrosion-resistant internal wetted parts—including PTFE diaphragm, EPDM seals, and stainless-steel valves—provide compatibility with mildly aggressive vapors (e.g., alcohols, acetone, dilute acids) when operated within specified concentration and temperature limits.
• Thermally protected 90 W induction motor delivers consistent torque across voltage fluctuations and maintains rated performance over extended runtime.

Sample Compatibility & Compliance

The DOA-P504-BN is designed for non-hazardous, non-explosive, non-particulate-laden gases and vapors. It is not intended for pumping condensable solvents at high concentrations, abrasive particulates, or gases exceeding Class II A explosion group limits per NEC/IEC 60079. All electrical components comply with UL Recognized Component standards (E115272) and carry CE marking per the EU Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU. While not certified to ISO 8573-1 for compressed air purity, its oil-free architecture inherently meets Class 0 (zero oil content) requirements for critical instrumentation air supply where ISO 8573-1:2010 Class 1–2 particulate/moisture control is implemented externally.

Software & Data Management

As a standalone electromechanical device, the DOA-P504-BN does not incorporate embedded firmware, digital interfaces, or data logging capabilities. Its operation is fully manual via front-panel power switch and external pressure regulation. For integration into automated workflows, users may interface the pump’s power circuit with programmable logic controllers (PLCs) or laboratory information management systems (LIMS) using dry-contact relay outputs (optional accessory). No software drivers, cloud connectivity, or FDA 21 CFR Part 11-compliant audit trails are provided—consistent with its classification as a Class I general-purpose utility device under GLP/GMP frameworks.

Applications

• Gravity and vacuum-assisted filtration of aqueous and organic solutions in chemistry and biology labs.
• Evacuation of desiccators and vacuum ovens prior to drying or storage of moisture-sensitive materials.
• Support vacuum source for rotary evaporators operating below 100 mbar absolute pressure.
• Positive-pressure purging of glove boxes, optical enclosures, or sensor housings with inert gases (N₂, Ar).
• Sample aspiration in microplate washers, ELISA readers, and automated liquid handlers requiring low-flow, pulse-free airflow.
• Portable vacuum supply for field-deployable environmental samplers, soil gas analyzers, and handheld FTIR accessories.

FAQ

Is the DOA-P504-BN suitable for continuous 24/7 operation?
Yes—when installed in well-ventilated environments with ambient temperatures between 5–40 °C and relative humidity ≤80% non-condensing, the pump is rated for indefinite duty cycle per GAST engineering specifications.
Can this pump handle acidic vapors such as HCl or HF?
No—while the PTFE diaphragm offers broad chemical resistance, concentrated or anhydrous acidic gases (especially HF, Cl₂, NO₂) exceed material compatibility limits and may cause rapid degradation; consult GAST Chemical Compatibility Guide before exposure.
Does the pump include vacuum hose fittings and power cord?
Standard configuration includes two 6-mm barbed vacuum/pressure ports, a molded power cord with IEC C13 inlet, and a fused mains plug; hoses and adapters are sold separately.
What is the expected service life under normal lab use?
With proper installation and avoidance of liquid ingress or particulate loading, mean time between failures (MTBF) exceeds 20,000 hours based on GAST accelerated life testing and field reliability data.
Is calibration or periodic verification required?
No formal calibration is mandated; however, users performing regulated work (e.g., pharmacopeial filtration) should verify ultimate vacuum and flow rate annually against traceable standards per internal SOPs aligned with ISO/IEC 17025 principles.