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 environments. Utilizing a sealed, corrosion-resistant PTFE-coated diaphragm and dual-head configuration, it operates on positive displacement principles—achieving vacuum through cyclic expansion and contraction of the diaphragm chamber without lubricating oil contamination. This architecture ensures continuous, clean vacuum generation ideal for applications demanding chemical inertness, particulate-free operation, and compliance with ISO 8573-1 Class 0 air quality standards. Designed for integration into analytical workflows—including solid-phase extraction (SPE), solvent filtration, vacuum drying, and sample concentration—the DOA-P504-BN delivers stable performance at –81 kPa ultimate vacuum and supports pressure boosting up to 60 psi (414 kPa) for dual-mode (vacuum/pressure) utility. Its 90 W, 220 V / 50 Hz motor enables consistent operation under standard European and Asian mains conditions, while thermally protected windings and an integrated thermal cutoff safeguard against overload-induced degradation.

Key Features

• Oil-free operation eliminates risk of hydrocarbon contamination—critical for GC sample preparation, pharmaceutical filtration, and cell culture media degassing.
• PTFE-coated diaphragm and stainless-steel valve assemblies ensure long-term resistance to solvents including methanol, acetonitrile, and ethyl acetate.
• Low-noise design (<52 dBA at 1 m) enables use in shared lab spaces without acoustic interference or need for external enclosures.
• Integrated pressure regulator and analog gauge allow real-time control and monitoring of output pressure or vacuum level during method execution.
• Compact footprint (193 × 165 × 271 mm) and lightweight construction (8 kg) facilitate benchtop deployment, mobile cart integration, or OEM embedding in analytical instruments.
• Thermal protection circuitry automatically interrupts power if internal temperature exceeds safe operational limits, extending service life and reducing unplanned downtime.

Sample Compatibility & Compliance

The DOA-P504-BN is compatible with standard 1/4″–28 UNF and 3/8″ barbed fittings, enabling direct connection to SPE manifolds (e.g., Agilent, Thermo Fisher), vacuum filtration assemblies (e.g., Millipore Sterivex, Whatman Mini-UniPrep), and desiccators. Its dry-running mechanism avoids oil backstreaming—ensuring compatibility with moisture-sensitive samples and eliminating post-run cleaning protocols required by rotary vane pumps. The unit complies with CE marking requirements (2014/30/EU EMC Directive and 2014/35/EU Low Voltage Directive), meets UL 61010-1 safety standards for laboratory equipment, and supports GLP/GMP documentation workflows via traceable serial-number-based calibration records and maintenance logs.

Software & Data Management

While the DOA-P504-BN operates as a standalone analog device, its pressure/vacuum output is inherently stable and repeatable—enabling seamless integration with third-party data acquisition systems via optional analog voltage output modules (e.g., 0–5 V proportional to vacuum level). When deployed within regulated environments, users may document operating parameters (runtime, duty cycle, ambient temperature) manually or via external PLC logging—supporting 21 CFR Part 11 audit trails when paired with validated electronic lab notebooks (ELNs) such as LabArchives or Benchling. No proprietary firmware or cloud connectivity is embedded; all control remains local and deterministic—a requirement for secure, air-gapped laboratory networks.

Applications

• Solid-phase extraction (SPE) manifold evacuation for pesticide residue analysis per EPA Method 525.3 and ISO 17025-accredited labs.
• Vacuum-assisted filtration of aqueous and organic extracts using glass or polypropylene filter holders.
• Desiccation of hygroscopic reference standards prior to gravimetric analysis (ASTM E122, USP <1251>).
• Evacuation of sample vials in automated liquid handlers requiring low-level vacuum hold (e.g., 40–60 kPa range).
• Positive-pressure purging of gas chromatography inlet lines and detector housings during maintenance cycles.
• OEM integration into portable environmental samplers, medical diagnostic analyzers, and point-of-care testing platforms.

FAQ

Is the DOA-P504-BN suitable for continuous-duty operation?
Yes—it is rated for indefinite intermittent or continuous operation at ambient temperatures ≤40°C and relative humidity ≤80%, provided adequate ventilation is maintained around the motor housing.
Can this pump handle corrosive vapors such as HCl or Cl₂?
No. While the diaphragm and valves resist common organic solvents, it is not rated for aggressive inorganic acids or oxidizing gases. For such applications, consult GAST’s chemically resistant DOA-V series with EPDM or Viton® elastomers.
Does the pump require periodic oil changes or lubrication?
No. As an oil-free diaphragm design, it contains no lubricants—eliminating scheduled oil maintenance, disposal concerns, and associated regulatory reporting (e.g., EPA RCRA waste classification).
What is the expected service life under typical lab usage?
With proper inlet filtration and avoidance of liquid ingress, mean time between failures (MTBF) exceeds 20,000 hours based on GAST’s accelerated life testing per ISO 5218 and internal reliability modeling.
Is a calibration certificate included with shipment?
A factory test report verifying vacuum performance (–81 kPa at 25°C, 50% RH) and pressure output (60 psi) is supplied. NIST-traceable calibration certification is available upon request at additional cost.