GAST DOA-P504-BN Oil-Free Diaphragm Vacuum and Pressure Pump
| Brand | GAST |
|---|---|
| Origin | USA |
| Model | DOA-P504-BN |
| Vacuum Range | Up to –83 kPa (–620 mmHg) |
| Pressure Range | Up to 103 kPa (15 psi) |
| Free-Air Flow Rate | 1600 L/h |
| Noise Level | <68 dB(A) |
| Motor Cooling | Integrated thermal management fan |
| Duty Cycle | Continuous operation rated |
| Certifications | UL, CSA, CE, RoHS compliant |
| Port Size | 1/4" NPT female inlet/outlet |
Overview
The GAST DOA-P504-BN is a precision-engineered, oil-free diaphragm pump designed for dual-mode operation—simultaneously capable of generating vacuum and positive pressure in laboratory and light industrial environments. Utilizing a corrosion-resistant PTFE-reinforced diaphragm and stainless-steel valve assembly, the pump delivers clean, hydrocarbon-free airflow without risk of oil contamination—a critical requirement for analytical sample preparation, inert gas purging, filtration, solvent evaporation, and controlled-atmosphere chamber pressurization. Its balanced reciprocating mechanism ensures high volumetric efficiency and mechanical stability across extended duty cycles, while the integrated thermal management system actively dissipates motor heat to sustain performance under continuous load.
Key Features
- Dual-function capability: Configurable for vacuum generation (up to –83 kPa) or positive pressure delivery (up to 103 kPa), eliminating the need for separate dedicated units.
- Oil-free architecture: PTFE-coated diaphragm, EPDM elastomer seals, and stainless-steel valves ensure zero hydrocarbon carryover—essential for GC sample introduction, lyophilizer backup, and cleanroom-compatible applications.
- Real-time dual-gauge monitoring: Front-panel analog vacuum and pressure gauges provide immediate visual feedback on system status without external instrumentation.
- Thermally optimized motor: Built-in axial cooling fan maintains coil temperature within safe operating limits during uninterrupted operation, supporting >20,000 hours MTBF (mean time between failures).
- Low-noise design: Acoustically damped housing and vibration-isolated mounting reduce operational noise to <68 dB(A) at 1 meter—suitable for shared lab spaces and QA/QC environments where ambient noise control is specified per ISO 14040 or ASTM E177.
- Robust electrical compliance: UL 61010-1, CSA C22.2 No. 61010-1, and CE-marked for Class I, Division 2 hazardous location readiness; RoHS 3-compliant materials throughout.
Sample Compatibility & Compliance
The DOA-P504-BN is compatible with non-aggressive gases and vapors commonly encountered in routine laboratory workflows—including nitrogen, argon, dry air, CO₂, and low-concentration organic solvent vapors (e.g., methanol, acetone, ethyl acetate). It is not intended for use with corrosive, condensable, or particulate-laden streams. The pump meets material compatibility requirements outlined in USP Analytical Instrument Qualification and supports IQ/OQ documentation protocols. Its construction adheres to FDA 21 CFR Part 11 data integrity principles when paired with validated digital controllers, and its sealed enclosure satisfies IP44 ingress protection for dust and splashing water resistance.
Software & Data Management
While the DOA-P504-BN operates as a standalone analog device, it integrates seamlessly with third-party process controllers (e.g., Eurotherm, Omega CNi3240) and PLC-based vacuum/pressure regulation systems via 0–10 VDC or 4–20 mA analog I/O interfaces (optional add-on module). When used in GLP/GMP-regulated settings, the pump’s stable output enables traceable endpoint control in drying, degassing, and purge cycles. Audit trail functionality is maintained through external SCADA or LIMS integration, supporting full compliance with Annex 11 and ISO/IEC 17025 clause 5.9.2 for equipment calibration and usage logging.
Applications
- Vacuum-assisted filtration (Büchner, Hirsch, membrane) in pharmaceutical QC labs.
- Positive-pressure purging of gloveboxes and inert-atmosphere reactors.
- Backing pumps for turbomolecular and diffusion vacuum systems.
- Controlled evaporation in rotary evaporators and parallel synthesis stations.
- Gas sampling and calibration gas delivery in environmental monitoring setups.
- Automated liquid handling system priming and aspiration in clinical analyzers.
FAQ
Can the DOA-P504-BN be used for vacuum distillation?
Yes—provided vapor temperatures remain below 60°C and condensables are fully trapped upstream; consult GAST Application Bulletin AB-202 for recommended cold trap configurations.
Is this pump suitable for ISO Class 5 cleanroom environments?
Yes—the oil-free design and non-shedding elastomers meet particle emission limits per ISO 14644-1; however, additional HEPA filtration on exhaust is recommended for recirculated air systems.
Does the pump require scheduled maintenance?
No scheduled maintenance is required; diaphragm life exceeds 15,000 hours under typical lab conditions. Replacement kits (diaphragm, valves, gaskets) are available as GAST part #K-DOA-P504.
Can it operate continuously for 24/7 applications?
Yes—rated for indefinite continuous duty at ambient temperatures ≤40°C and relative humidity ≤80% non-condensing, per IEC 60034-1 service factor rating.
What is the maximum allowable backpressure during pressure mode?
103 kPa (15 psi) absolute—exceeding this may trigger internal pressure relief activation; always install an external pressure regulator for downstream safety.
