Zhengzhou Great Wall MP-201Z Oil-Free Diaphragm Vacuum Pump

Overview

The Zhengzhou Great Wall MP-201Z is an oil-free diaphragm vacuum pump engineered for reliable, contamination-free vacuum generation in analytical and preparative laboratory workflows. Operating on positive displacement principle via an elastomeric diaphragm driven by an eccentric cam mechanism, the MP-201Z delivers consistent suction without internal lubricants—eliminating oil backstreaming, vapor contamination, or maintenance associated with rotary vane pumps. Its ultimate vacuum of 8 mbar (0.0992 MPa) and stable pumping speed of 25 L/min make it suitable for applications requiring moderate vacuum levels, including rotary evaporation, solvent distillation, vacuum drying ovens, freeze-drying pre-evacuation, crystallization under reduced pressure, and pressure-sensitive filtration (e.g., Büchner or Hirsch funnels). Designed for continuous operation in ambient temperatures up to 40 °C and relative humidity ≤80%, the MP-201Z meets fundamental safety and performance expectations for Class II laboratory vacuum sources per IEC 61010-1.

Key Features

• Oil-free operation ensures zero hydrocarbon contamination—critical for GC sample preparation, pharmaceutical residue analysis, and moisture-sensitive synthesis.
• Chemically resistant PTFE-coated diaphragm and EPDM valves provide compatibility with mildly corrosive vapors, including diluted acids (e.g., HCl, HNO₃), bases (e.g., NaOH), and common organic solvents (e.g., acetone, ethanol, ethyl acetate).
• Integrated thermal overload protection automatically interrupts power if motor temperature exceeds safe operating limits, extending service life and supporting unattended overnight operation.
• Low-vibration, brushless AC motor (180 W, 1300 rpm) minimizes mechanical resonance—essential when mounted adjacent to analytical balances or optical instruments.
• Compact footprint (300 × 230 × 170 mm) and lightweight design (10 kg) enable flexible benchtop integration, mobile cart mounting, or placement inside fume hoods with minimal spatial impact.
• Standard Ø6 mm inlet port accepts standard silicone or Viton tubing; optional vacuum gauge port (M10×1 thread) supports analog or digital pressure monitoring upgrades.

Sample Compatibility & Compliance

The MP-201Z is validated for use with non-explosive, non-particulate-laden gas streams. It is not rated for Class I, Division 1 hazardous locations per NEC/ATEX; however, its oil-free architecture inherently reduces ignition risk compared to oil-sealed alternatives. While not certified to ISO 8573-1 for compressed air purity, its exhaust stream contains no lubricant aerosols—making it appropriate for venting into well-ventilated lab spaces or through activated carbon scrubbers for acidic or volatile organic compound (VOC) abatement. The unit complies with CE marking requirements (EMC Directive 2014/30/EU and Low Voltage Directive 2014/35/EU) and conforms to RoHS 2011/65/EU restrictions on hazardous substances. For GLP-compliant environments, routine verification of ultimate vacuum and flow rate using calibrated reference gauges is recommended per internal SOPs.

Software & Data Management

The MP-201Z operates as a standalone analog device without embedded firmware, network interface, or digital control bus. No proprietary software, drivers, or cloud connectivity are required or supported. This architecture eliminates cybersecurity exposure, firmware update dependencies, and interoperability constraints—aligning with institutional IT policies that restrict networked lab peripherals. All operational parameters (voltage, frequency, motor speed, vacuum level, flow rate) are fixed at factory calibration and require no user configuration. For labs implementing electronic lab notebooks (ELN) or LIMS, vacuum status may be logged manually or via external pressure transducers connected to data acquisition systems (e.g., LabVIEW, MATLAB, or Python-based DAQ platforms).

Applications

• Rotary evaporation of heat-labile compounds where oil contamination would compromise product purity or downstream NMR analysis.
• Reduced-pressure crystallization of APIs to control crystal habit and polymorphic form without solvent residue from pump oils.
• Vacuum-assisted filtration of corrosive filtrates in inorganic synthesis, avoiding seal degradation common in wet vacuum pumps.
• Pre-evacuation of lyophilizer chambers prior to primary drying—compatible with water vapor loads typical of small-scale freeze-drying cycles.
• Gas sampling manifolds in environmental testing labs where cross-sample carryover must be eliminated between VOC or halogenated hydrocarbon analyses.
• Educational laboratories performing physical chemistry experiments (e.g., vapor pressure determination, Trouton’s rule validation) requiring repeatable, low-maintenance vacuum sources.

FAQ

Can the MP-201Z handle hydrogen chloride (HCl) gas continuously?
Yes—when equipped with optional PTFE diaphragm and EPDM valve kits, the pump tolerates intermittent exposure to <5% aqueous HCl vapor; continuous duty requires inline condensation traps and neutralization scrubbers.
Is this pump suitable for vacuum oven applications?
Yes—its 8 mbar ultimate vacuum meets ASTM D2879-18 requirements for vacuum drying of polymers and coatings; ensure oven chamber volume does not exceed 5× the pump’s free-air capacity (i.e., ≤125 L) for efficient evacuation.
Does the MP-201Z comply with FDA 21 CFR Part 11?
No—it lacks audit trail, electronic signature, or user access controls; however, its analog operation simplifies validation in regulated environments where manual log entries suffice.
What is the expected service life under daily 8-hour operation?
With proper inlet filtration and ambient temperature control, diaphragm and valve assemblies typically last 8,000–10,000 operating hours before replacement.
Can multiple MP-201Z units be manifolded to increase total flow rate?
Yes—parallel connection via equal-length, low-resistance tubing preserves individual pump performance; avoid series configurations, which degrade ultimate vacuum and accelerate diaphragm fatigue.