JINTENG GM-0.20 Diaphragm Vacuum Pump

Overview

The JINTENG GM-0.20 Diaphragm Vacuum Pump is an oil-free, corrosion-resistant laboratory vacuum source engineered for precision and reliability in low-to-medium vacuum applications. Utilizing a reciprocating diaphragm mechanism driven by a brushless AC motor, it generates vacuum through positive displacement without lubricating oil—eliminating risk of sample contamination, hydrocarbon backstreaming, or maintenance-intensive oil changes. Its ultimate vacuum capability of 300 mbar (abs) and stable pumping speed of 12 L/min at atmospheric inlet conditions make it suitable for continuous-duty operation in analytical instrumentation support, including HPLC degassing, rotary evaporation auxiliary vacuum, vacuum filtration, and sample preparation workflows. Designed with thermal overload protection and a robust aluminum alloy housing coated with epoxy-polyester anti-corrosion finish, the GM-0.20 maintains mechanical integrity across ambient temperatures from 7 °C to 40 °C—ensuring consistent performance in standard laboratory environments.

Key Features

• Oil-free operation ensures zero hydrocarbon contamination—critical for GC, HPLC, and mass spectrometry sample preparation.
• Nylon 66 pump head and nitrile rubber (NBR) diaphragm provide high chemical resistance against common solvents (e.g., acetone, methanol, ethyl acetate) and mild acids/bases.
• Compact footprint (195 × 198 × 156 mm) and lightweight construction (4 kg) enable seamless integration onto lab benches, fume hoods, or mobile carts.
• Low-noise design (<50 dB[A] at 1 m) minimizes acoustic interference in shared analytical labs and QC facilities.
• Integrated thermal cut-off switch prevents motor damage during extended operation or elevated ambient temperatures.
• Standard Φ6 mm inlet port accepts common vacuum tubing (supplied: one 800 mm length of Φ7/Φ12 mm dual-bore silicone hose).

Sample Compatibility & Compliance

The GM-0.20 is compatible with aqueous, organic, and mildly aggressive liquid and gaseous samples encountered in pharmaceutical QA/QC, environmental testing, food safety analysis, and forensic chemistry laboratories. It meets CE marking requirements for electromagnetic compatibility (EMC Directive 2014/30/EU) and low-voltage safety (LVD Directive 2014/35/EU), and conforms to RoHS 2011/65/EU restrictions on hazardous substances. While not certified to ISO 8573-1 for compressed air purity (as it is a vacuum—not pressure—device), its oil-free architecture inherently satisfies ISO 8573-1 Class 0 equivalency for particulate and oil aerosol contamination in vacuum lines. The pump is routinely deployed as a supporting component in systems compliant with USP , ASTM D1298, and ISO 17025-accredited testing protocols where trace hydrocarbon exclusion is mandated.

Software & Data Management

As a standalone mechanical vacuum source, the GM-0.20 operates without embedded firmware, digital interfaces, or software control. It features a single-pole, single-throw (SPST) rocker switch for manual on/off actuation. No drivers, configuration utilities, or data logging capabilities are included—consistent with its role as a dedicated, maintenance-minimized utility device. For integration into automated platforms, optional external relay modules (e.g., 24 VDC solid-state relays) may be used to trigger pump activation via PLC or instrument I/O signals. Audit trails, electronic records, and 21 CFR Part 11 compliance are managed externally by the host analytical system—not the pump itself—aligning with FDA guidance for ancillary equipment in regulated environments.

Applications

• HPLC and UHPLC solvent degassing prior to column equilibration and gradient elution.
• Support vacuum for benchtop rotary evaporators processing heat-sensitive natural products or APIs.
• Vacuum-assisted filtration of biological suspensions, particulate-laden environmental water extracts, or precipitated reaction mixtures.
• Evacuation of sample vials and headspace autosampler trays in GC and GC-MS workflows.
• Creating controlled low-pressure environments for stability testing chambers or desiccator systems.
• Forensic evidence drying and preservation under inert gas blanket with vacuum-assisted purge cycles.

FAQ

Is the GM-0.20 suitable for use with aggressive solvents such as chloroform or concentrated nitric acid?
The nylon pump head and NBR diaphragm offer moderate resistance to polar organics and dilute acids, but prolonged exposure to strong oxidizers (e.g., >10% HNO₃) or halogenated solvents (e.g., CHCl₃) is not recommended. Consult the material compatibility chart before deployment.
Can this pump achieve high vacuum (e.g., <1 mbar)?
No—the GM-0.20 is rated for ultimate vacuum of 300 mbar (abs); it is not designed for high-vacuum applications requiring diffusion or turbomolecular pumping stages.
Does the pump require periodic maintenance or consumable replacement?
Yes—diaphragms and valve assemblies are wear items; JINTENG recommends inspection every 6 months under continuous operation and replacement per manufacturer’s service schedule (typically 5,000–8,000 operating hours).
Is the GM-0.20 compatible with vacuum controllers or pressure feedback loops?
It lacks analog/digital I/O ports; however, external vacuum gauges (e.g., capacitance manometers) and proportional solenoid valves can be integrated upstream using third-party PID controllers.
What safety certifications does the unit carry?
The unit carries CE marking per EU directives and complies with RoHS 2011/65/EU. It is not UL-listed or CSA-certified for North American markets unless re-evaluated by an authorized NRTL.