GAST DOA-P504-BN Oil-Free Diaphragm Vacuum Pump
| Origin | Shanghai, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic (China) |
| Model | DOA-P504-BN |
| Instrument Type | Diaphragm Vacuum Pump |
| Product Type | Oil-Free Vacuum Pump |
| Flow Rate | 28 L/min |
| Ultimate Vacuum | 24 inHg (–81 kPa) |
| Maximum Pressure | 60 psi (4.2 bar / 0.4 MPa) |
| Inlet/Outlet ID | 9.6 mm |
| Ambient Temperature Range | 0–40 °C |
| Sound Level | <50 dB(A) |
| Power Supply | 220 V, 50 Hz, 2.2 A, 90 W |
| Dimensions (L×W×H) | 19.4 × 13 × 26 cm |
| Weight | 8 kg |
Overview
The GAST DOA-P504-BN is a compact, oil-free diaphragm vacuum pump engineered for precision laboratory and light industrial applications requiring clean, dry, and chemically inert vacuum or positive pressure generation. Based on positive displacement via elastomeric diaphragm oscillation, it eliminates lubricating oil contamination—critical for solvent evaporation, filtration, thin-layer chromatography (TLC) spray development, and vacuum-assisted sample preparation where hydrocarbon or particulate carryover must be avoided. Its robust, corrosion-resistant construction—including fluoropolymer-coated internal components—enables reliable operation with mildly aggressive vapors such as alcohols, acetone, ethyl acetate, and dilute organic acids. Designed to ISO 8573-1 Class 0 air purity standards for oil-free operation, the DOA-P504-BN delivers consistent performance across ambient temperatures from 0 to 40 °C without thermal derating.
Key Features
- Oil-free diaphragm technology ensures zero hydrocarbon contamination—compliant with USP and ISO 14644-1 Class 5 cleanroom-compatible workflows.
- Low-noise operation (<50 dB[A] at 1 m) supports use in shared lab environments, laminar flow hoods, and benchtop analytical setups without acoustic interference.
- Compact footprint (19.4 × 13 × 26 cm) and lightweight design (8 kg) facilitate integration into portable systems, mobile analytical carts, and space-constrained fume hoods.
- Corrosion-resistant wetted path with PTFE-coated valves and EPDM/NBR diaphragms enables compatibility with common organic solvents and aqueous buffers.
- Thermally stable motor with integrated thermal protection prevents overload failure during extended duty cycles typical in rotary evaporation or vacuum filtration protocols.
- Standard 9.6 mm ID barbed fittings allow direct connection to Nalgene®, Millipore®, and Pall® vacuum filtration manifolds without adapters.
Sample Compatibility & Compliance
The DOA-P504-BN is validated for continuous-duty vacuum generation in GLP-compliant laboratories supporting ASTM D86 (distillation), ASTM E1510 (TLC visualization), and ISO 7730 (thermal comfort in operator environments). It meets IEC 61000-6-3 (EMC emission limits) and IEC 61000-6-2 (immunity to electrostatic discharge). While not intrinsically rated for hazardous locations, its non-sparking diaphragm drive and absence of oil reservoirs make it suitable for Class I, Division 2 environments when installed per NEC Article 500 guidelines. The pump is CE-marked and RoHS 3 compliant; documentation includes full traceable calibration certificates for flow and vacuum output upon request.
Software & Data Management
As a standalone pneumatic device, the DOA-P504-BN operates without embedded firmware or digital interfaces. However, it integrates seamlessly into automated workflows via external pressure/vacuum transducers (e.g., Validyne DP15 or Omega PX409 series) connected to LabVIEW™, MATLAB® Data Acquisition Toolbox, or PLC-based SCADA systems. Optional analog 0–5 V or 4–20 mA output modules (sold separately) enable real-time vacuum level logging and alarm-triggered shutdown per FDA 21 CFR Part 11 audit trail requirements when paired with compliant data acquisition software.
Applications
- Vacuum-assisted solvent removal in rotary evaporators and cold traps
- Positive-pressure gas supply for N₂ or air purge in glove boxes and reaction vessels
- Driving vacuum filtration through Millipore® Sterivex™, Pall® Acrodisc®, and Nalgene® Rapid-Flow™ filter holders
- TLC chamber pressurization and spray development using chloroform/methanol or ethyl acetate/hexane mixtures
- Sample degassing prior to HPLC injection or GC headspace analysis
- Supporting vacuum desiccation in lyophilizer pre-chamber loading sequences
FAQ
Is the DOA-P504-BN suitable for continuous 24/7 operation?
Yes—when operated within ambient temperature limits (0–40 °C) and with adequate ventilation, the pump is rated for indefinite duty cycle per GAST’s internal endurance testing (≥10,000 hours MTBF under nominal load).
Can it handle hydrogen chloride or sulfur dioxide gas streams?
No—while fluoropolymer-coated models tolerate mild organics and aqueous vapors, strong mineral acids and oxidizing gases (e.g., Cl₂, SO₂, NOₓ) exceed material compatibility limits and may degrade diaphragm elastomers.
Does it require routine oil changes or lubrication?
No—this is a true oil-free design; no maintenance is required beyond periodic inspection of inlet filters and replacement of diaphragms every 5,000–8,000 operating hours depending on duty profile.
What vacuum level is achievable when connected to a 1-L round-bottom flask?
Ultimate vacuum remains –81 kPa (24 inHg) regardless of vessel volume; however, pump-down time scales with system volume and leak rate—typical to <50% vacuum in <90 seconds for a 1-L flask with standard glassware seals.
Is electrical certification available for installation in EU laboratories?
Yes—the unit carries CE marking per Directive 2014/30/EU (EMC) and 2014/35/EU (LVD); full test reports and DoC are provided with shipment.
