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-coated diaphragm and stainless-steel valve assembly, it generates vacuum via positive displacement without lubricating oil—eliminating risk of sample contamination, oil backstreaming, or periodic oil changes. Its dual-head design delivers balanced pulsation damping and stable flow characteristics, making it suitable for continuous-duty applications such as vacuum filtration, rotary evaporation support, vacuum oven evacuation, and gas sampling systems. With an ultimate vacuum level of 200 mbar (abs) and a free air delivery rate of 28 L/min at atmospheric inlet conditions, the DOA-P504-BN provides sufficient suction capacity for benchtop instrumentation requiring moderate vacuum performance and high chemical inertness.

Key Features

• Oil-free operation ensures zero hydrocarbon contamination—critical for GC sample introduction, mass spectrometry auxiliary pumping, and pharmaceutical process validation.
• Corrosion-resistant wetted materials: PTFE diaphragm, EPDM valves, and stainless-steel internal components enable compatibility with mildly aggressive vapors including HCl, SO₂, and organic solvents.
• Integrated pressure regulation system with built-in gauge and adjustable needle valve allows precise control of both vacuum and positive pressure output (up to 60 psi / 414 kPa).
• Low-noise design (<52 dBA at 1 m) supports use in shared lab spaces and ISO-classified cleanrooms where acoustic emissions must remain below operational thresholds.
• Robust 90 W induction motor with thermal overload protection ensures long service life under intermittent or extended duty cycles.
• Ergonomic carrying handle and compact footprint (193 × 165 × 271 mm) facilitate integration into mobile analytical platforms, field-deployable instruments, and OEM equipment enclosures.

Sample Compatibility & Compliance

The DOA-P504-BN is validated for use with aqueous, organic, and mildly corrosive gaseous samples. It complies with IEC 61000-6-3 (EMC emission standards) and IEC 61000-6-2 (immunity requirements), meeting essential CE marking criteria for laboratory equipment within the European Economic Area. While not intrinsically rated for hazardous locations, its non-sparking motor and absence of lubricants render it appropriate for Class I, Division 2 environments when installed per NEC Article 500 guidelines. The pump supports GLP-compliant workflows through consistent performance traceability; however, for FDA 21 CFR Part 11–regulated applications, external audit-trail-capable controllers must be employed for parameter logging and user access management.

Software & Data Management

As a standalone mechanical device, the DOA-P504-BN does not incorporate embedded firmware or digital communication interfaces (e.g., RS-232, USB, or Modbus). Operational parameters—including inlet pressure, outlet pressure, and runtime—are monitored externally via analog gauges and manual regulators. For automated integration, third-party pressure transducers (e.g., Honeywell ASDX series) and programmable logic controllers (PLCs) may be interfaced using standard 4–20 mA or 0–10 V analog signals. Data acquisition systems compliant with ASTM D3924 or ISO/IEC 17025 calibration protocols can record vacuum stability over time, supporting reproducibility assessments in method validation studies.

Applications

• Vacuum-assisted liquid handling in automated pipetting workstations and microplate washers.
• Support vacuum for benchtop rotary evaporators (e.g., Buchi R-100, IKA RV 10) processing heat-sensitive compounds.
• Gas purging and blanketing in inert-atmosphere gloveboxes and reaction vessels.
• Sample preparation for elemental analysis techniques including AAS and ICP-OES, where oil-free aspiration prevents graphite tube fouling.
• OEM integration into environmental monitoring analyzers (e.g., NOₓ, SO₂, O₃ sensors) requiring stable, pulse-dampened vacuum draw.
• Positive-pressure actuation of pneumatic valves and diaphragm-based fluidic controls in diagnostic instrumentation.

FAQ

Is the DOA-P504-BN certified for use in cleanroom environments?

Yes—the pump’s oil-free architecture and low particulate shedding meet ISO 14644-1 Class 5 requirements when operated with HEPA-filtered inlet air and housed in laminar flow cabinets.
Can this pump handle solvent vapors from rotary evaporation?

It is compatible with common solvents (e.g., acetone, ethanol, ethyl acetate) but not recommended for chlorinated or highly acidic vapors without optional corrosion-resistant coating upgrades.
What is the expected service life under continuous operation?

Rated for >10,000 hours MTBF when operated within ambient temperatures of 15–35°C and relative humidity ≤80% non-condensing.
Does GAST provide calibration documentation with shipment?

Factory test reports verifying ultimate vacuum and flow rate are included; NIST-traceable calibration certificates are available upon request at additional cost.
Is the motor compatible with variable-frequency drives (VFDs)?

No—the single-phase induction motor is not VFD-rated; speed modulation must be achieved via upstream pressure regulation or duty-cycle control.