GAST DOA-P504-BN Oil-Free Diaphragm Vacuum Pump
| Brand | GAST |
|---|---|
| Origin | USA |
| Model | DOA-P504-BN |
| Pump Type | Oil-Free Diaphragm Pump |
| Motor | 90 W, 220 V AC, 50 Hz |
| Max Pressure | 0.42 MPa (4.2 kg/cm²) |
| Max Vacuum | –80 kPa (200 mbar abs) |
| Free-Air Flow | 27 L/min (1.6 m³/h) |
| Weight | 6.8 kg |
| Dimensions (L×W×H) | 193 × 165 × 271 mm |
| Accessories | Pressure Gauge, Regulating Valve, Carry Handle, Rubber Feet, Fittings, On/Off Switch |
Overview
The GAST DOA-P504-BN is a compact, oil-free diaphragm vacuum pump engineered for reliable, maintenance-free operation in laboratory and light industrial environments. Utilizing a precision-machined PTFE-coated diaphragm and stainless-steel valve assembly, it achieves true dry operation—eliminating oil contamination risks, vapor backstreaming, and scheduled lubrication. Its dual-function design supports both vacuum generation (down to –80 kPa absolute) and positive pressure delivery (up to 0.42 MPa), making it suitable for applications requiring reversible gas handling without hardware modification. The pump operates on a single-phase 220 V / 50 Hz supply and integrates a thermally protected 90 W induction motor optimized for continuous duty cycles under variable load conditions.
Key Features
- Oil-free diaphragm technology ensures zero hydrocarbon carryover—critical for analytical sample integrity, solvent filtration, and inert atmosphere preparation.
- Integrated pressure gauge and adjustable regulating valve enable real-time monitoring and precise output control across vacuum and pressure modes.
- Acoustically damped housing and balanced diaphragm actuation deliver <52 dB(A) sound pressure level at 1 m—ideal for shared lab spaces and noise-sensitive workflows.
- Robust construction includes corrosion-resistant aluminum alloy body, EPDM elastomer seals, and reinforced polymer end caps for long-term stability under cyclic stress.
- Portable form factor (6.8 kg, 193 × 165 × 271 mm) with ergonomic carry handle and non-slip rubber feet facilitates benchtop deployment, mobile cart integration, or field use.
- CE-compliant electrical design with IP20 ingress protection and Class B insulation meets IEC 61000-6-3 EMC requirements for laboratory electromagnetic environments.
Sample Compatibility & Compliance
The DOA-P504-BN is compatible with standard laboratory vacuum tubing (6–10 mm ID), Büchner funnels, filter flasks, desiccators, and vacuum ovens. Its dry pumping mechanism prevents cross-contamination between samples and eliminates the need for trap maintenance when handling aqueous, mildly acidic, or polar organic vapors. While not rated for explosive or highly reactive gases (e.g., chlorine, hydrogen sulfide, or silanes), optional fluoropolymer-coated variants are available for enhanced chemical resistance. The unit conforms to ISO 8573-1:2010 Class 0 air purity standards for oil-free compressed air and supports GLP-compliant documentation through traceable serial-numbered calibration records.
Software & Data Management
As a standalone mechanical pump, the DOA-P504-BN does not incorporate embedded firmware or digital interfaces. However, its analog control architecture—including hardwired on/off switching and manual pressure regulation—ensures deterministic response and immunity to software failure modes. For automated integration, users may interface the pump’s power circuit with external programmable logic controllers (PLCs) or LabVIEW-compatible relay modules. All operational parameters (voltage, frequency, flow, and pressure limits) are documented in accordance with ASTM D3924–22 (Standard Practice for Laboratory Vacuum System Performance Verification) and referenced in GAST’s certified technical datasheets (Revision E, 2023).
Applications
- Gravity-assisted and vacuum-assisted filtration of aqueous and organic solutions in QC/QA labs.
- Evaporative concentration of heat-labile compounds using rotary evaporators with low-vacuum staging.
- Sample degassing prior to HPLC injection or viscometry measurement to minimize bubble artifacts.
- Controlled atmosphere purging in glove boxes, drying ovens, and material storage enclosures.
- Actuation of pneumatic valves, vacuum chucks, and small-scale vacuum forming tools in prototyping setups.
- Field-deployable backup vacuum source for portable GC detectors or environmental air samplers.
FAQ
Is the DOA-P504-BN suitable for continuous 24/7 operation?
Yes—its thermally protected motor and sealed diaphragm assembly are rated for indefinite duty cycle under ambient temperatures ≤40 °C and relative humidity ≤80% non-condensing.
Can this pump handle corrosive gases such as HCl or SO₂?
No—the standard DOA-P504-BN is not chemically rated for aggressive acids or oxidizers. For such applications, specify the DOA-P504-BN-F model with fluoropolymer-coated wetted parts.
What is the expected service life under typical lab usage?
With proper inlet filtration and avoidance of liquid ingestion, mean time between failures (MTBF) exceeds 20,000 hours per GAST’s accelerated life testing protocol (per MIL-HDBK-217F).
Does the pump require periodic oil changes or lubrication?
No—this is a fully oil-free design; no routine lubrication, oil replenishment, or oil mist filtration is necessary.
Is the pressure gauge calibrated and traceable to NIST standards?
The integrated gauge is factory-calibrated to ±2% full scale accuracy. NIST-traceable calibration certificates are available upon request at time of order.
