JINTENG GM-0.5B Diaphragm Vacuum Pump

Overview

The JINTENG GM-0.5B Diaphragm Vacuum Pump is a dry, oil-free vacuum source engineered for precision laboratory applications requiring clean, contamination-free negative pressure. Unlike rotary vane or piston pumps, it operates on a positive displacement principle using elastomeric diaphragms actuated by an eccentric cam mechanism—eliminating lubricants, hydrocarbon vapors, and particulate carryover. This makes it especially suitable for coupling with sensitive analytical instrumentation such as gas chromatographs (GC), liquid chromatography systems (LC), mass spectrometers (MS), and vacuum-assisted filtration setups where sample integrity and system cleanliness are critical. Its dual-head configuration enhances volumetric efficiency and provides stable vacuum delivery across variable load conditions, while the die-cast aluminum housing ensures structural rigidity, thermal dissipation, and long-term dimensional stability under repeated thermal cycling.

Key Features

• Oil-free operation: No lubricating oil required—prevents cross-contamination of samples, vacuum lines, and connected instruments; compliant with ISO 8573-1 Class 0 air purity requirements for critical vacuum paths.
• Dual-head diaphragm architecture: Delivers consistent 30 L/min free-air displacement with reduced pulsation and improved flow stability compared to single-head equivalents.
• Self-cooled continuous-duty design: Integrated passive airflow management enables uninterrupted 24/7 operation without external cooling or duty-cycle limitations.
• Adjustable vacuum regulation: Built-in pressure control allows fine-tuning of ultimate vacuum level (down to ≥0.095 MPa / ≥50 mbar) to match application-specific requirements—e.g., gentle solvent removal in HPLC sample prep or controlled degassing in pharmaceutical formulation.
• Low-noise performance: Acoustic emission <50 dB(A) at 1 m distance—meets ISO 3744 standards for laboratory-grade equipment and supports quiet operation in shared lab environments.
• Robust mechanical construction: Precision die-cast aluminum body resists corrosion, minimizes vibration transmission, and maintains alignment tolerance over extended service life.

Sample Compatibility & Compliance

The GM-0.5B is compatible with standard Ø6 mm vacuum tubing (e.g., silicone, Viton®, or PTFE-lined hose) and integrates seamlessly with Büchner funnels, vacuum ovens, desiccators, and GC autosampler purge systems. It meets general-purpose safety and electromagnetic compatibility requirements per IEC 61000-6-3 (emission) and IEC 61000-6-2 (immunity). While not certified to specific FDA 21 CFR Part 11 or EU Annex 11 requirements as a standalone device, its oil-free operation supports GLP/GMP-aligned workflows where documentation of vacuum source purity and maintenance history is essential. It is routinely deployed in laboratories adhering to ASTM D1298 (crude oil density), USP (chromatography system suitability), and ISO 17025-accredited testing protocols.

Software & Data Management

The GM-0.5B is a manually operated, analog vacuum pump with no embedded firmware, digital interface, or data logging capability. All operational parameters—including inlet pressure, flow rate, and motor status—are monitored externally via connected gauges, flow meters, or process controllers. For integration into automated workflows, optional analog (0–10 VDC or 4–20 mA) vacuum feedback modules may be installed downstream. No proprietary software or driver installation is required. Maintenance logs, calibration records, and usage hours should be tracked manually per institutional SOPs to support audit readiness under ISO/IEC 17025 or CAP accreditation frameworks.

Applications

• Vacuum-assisted filtration in pharmaceutical QC labs (e.g., membrane filtration of sterile injectables per USP )
• Gas chromatography carrier gas supply and detector exhaust management
• Concentration and solvent removal in preparative LC and solid-phase extraction (SPE)
• Lyophilization pre-vacuum stages and cold trap evacuation
• Forensic toxicology sample preparation, including vacuum drying of seized evidence extracts
• Food safety testing workflows involving vacuum distillation (AOAC 971.23) and fat extraction (Soxhlet variants)
• Biochemical assay development requiring inert, hydrocarbon-free vacuum environments

FAQ

Is the GM-0.5B suitable for use with mass spectrometry vacuum manifolds?
Yes—its oil-free operation prevents hydrocarbon backstreaming, making it appropriate for roughing pumps in hybrid vacuum systems when paired with turbomolecular or diffusion pumps.
What is the expected service life under continuous operation?
With proper ambient temperature control (<40 °C) and periodic diaphragm inspection (recommended every 6,000 operating hours), typical service life exceeds 15,000 hours.
Can the pump handle condensable vapors such as water or ethanol?
It is not designed for high-volume condensable vapor loads; use of an inline cold trap or chemical trap is strongly recommended when evacuating solvents.
Does the GM-0.5B comply with RoHS or REACH directives?
As manufactured in Tianjin, the unit conforms to China’s GB/T 26572-2011 standard for hazardous substance restrictions, aligned with RoHS 2 (2011/65/EU) material declarations.
Is there a CE or UL certification mark on this model?
No—this model carries no third-party safety certification; users must verify local regulatory acceptance prior to installation in regulated facilities.