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 reliable, low-maintenance operation in laboratory, analytical, and light industrial environments. Utilizing a precision-machined PTFE-reinforced diaphragm and dual-spring valve system, it generates vacuum via positive displacement without lubricating oil—eliminating risk of sample contamination, hydrocarbon backstreaming, or oil vapor carryover. Its robust cast-aluminum housing and corrosion-resistant internal components ensure long-term stability under intermittent or continuous duty cycles. Designed to meet the stringent requirements of ISO 8573-1 Class 0 air quality standards for oil-free operation, the DOA-P504-BN delivers consistent performance across diverse applications including vacuum filtration, solvent evaporation, gas sampling, vacuum drying ovens, and interfacing with mass spectrometers or gas chromatographs where clean, dry vacuum is critical.

Key Features

• Oil-free diaphragm architecture ensures zero hydrocarbon contamination—ideal for sensitive analytical workflows requiring ultra-clean vacuum environments.
• Integrated pressure regulator valve and analog pressure gauge enable precise control and real-time monitoring of output pressure (0–60 psi) and vacuum level (down to –81 kPa).
• Thermally protected 90 W AC motor (220 V, 50 Hz) provides stable operation with automatic thermal shutdown to prevent coil overheating during extended use.
• Low-noise design (<52 dBA at 1 m) supports quiet operation in shared lab spaces, teaching laboratories, and QA/QC suites where acoustic interference must be minimized.
• Compact footprint (193 × 165 × 271 mm) and integrated ergonomic carry handle facilitate benchtop integration and portable deployment between instruments or workstations.
• UL-recognized electrical components and CE/RoHS compliance confirm adherence to international safety and environmental directives applicable to laboratory equipment.

Sample Compatibility & Compliance

The DOA-P504-BN is compatible with non-aggressive, non-condensable gases and dry air streams. It is not rated for explosive, highly corrosive (e.g., HF, Cl₂), or solvent-saturated vapors unless equipped with optional corrosion-resistant coatings (e.g., EPDM or Viton® valve seals). As a general-purpose vacuum source, it meets mechanical and electrical safety benchmarks per IEC 61000-6-3 (EMC emission limits) and IEC 61000-6-2 (immunity). While not certified for medical device use under ISO 13485, its construction and traceable component sourcing support GLP-compliant documentation practices. Users deploying this pump in regulated environments (e.g., pharmaceutical QC labs) should validate its performance against application-specific acceptance criteria per ASTM D3924 or USP Analytical Instrument Qualification protocols.

Software & Data Management

The DOA-P504-BN operates as a standalone analog device with no embedded firmware, digital interface, or data logging capability. Its simplicity ensures high reliability and eliminates cybersecurity concerns associated with networked instrumentation. For integration into automated systems, external pressure transducers (e.g., 4–20 mA or 0–10 V output) may be installed downstream and connected to PLCs, SCADA platforms, or LabVIEW-based DAQ systems. Audit trails for maintenance history, calibration records, and usage logs must be maintained manually per institutional SOPs—consistent with FDA 21 CFR Part 11 principles when used in GxP-regulated settings.

Applications

• Vacuum-assisted filtration using Büchner or Hirsch funnels in chemistry and environmental sample preparation.
• Rotary evaporation support for low-boiling-point solvent removal in organic synthesis and natural product isolation.
• Gas purging and inert atmosphere generation for glovebox pre-evacuation or reactor blanking procedures.
• Sample degassing prior to XRD, SEM, or TGA analysis to eliminate trapped moisture or volatile residues.
• Driving vacuum manifolds for multi-port parallel extraction systems (e.g., solid-phase extraction cartridges).
• Actuating pneumatic valves or vacuum grippers in custom-built lab automation fixtures.

FAQ

Is the DOA-P504-BN suitable for continuous-duty operation?
Yes—when ambient temperature remains below 40 °C and inlet gas is dry and particle-free, the pump supports indefinite duty cycles with periodic inspection of diaphragm integrity every 6–12 months depending on usage intensity.
Can this pump handle corrosive gases?
Not in standard configuration. Optional models with EPDM or Viton® elastomers and stainless-steel wetted parts are available for limited exposure to mildly corrosive vapors; consult GAST’s chemical compatibility guide before deployment.
Does it require routine oil changes or lubrication?
No—this is an inherently oil-free design. The only scheduled maintenance involves visual inspection of the diaphragm and inlet filter, and replacement of the filter element every 3–6 months in dusty environments.
What is the expected service life under typical lab conditions?
With proper ventilation and load management, mean time between failures (MTBF) exceeds 20,000 hours based on GAST’s accelerated life testing per ISO 5211 Annex B.
Is the pressure regulator adjustable while the pump is running?
Yes—the integrated needle-type regulator allows real-time adjustment of outlet pressure without interrupting operation, enabling dynamic process control during vacuum hold or pressure ramping sequences.