Great Wall MP-201Z Diaphragm Vacuum Pump

Overview

The Great Wall MP-201Z Diaphragm Vacuum Pump is an oil-free, corrosion-resistant laboratory vacuum source engineered for reliable operation in chemically demanding applications. It employs a precision-machined PTFE-coated diaphragm and stainless steel valve assembly to generate consistent negative pressure without lubricant contamination—eliminating the risk of oil backstreaming or sample cross-contamination. Its operating principle relies on reciprocating diaphragm motion driven by a brushed AC motor, converting rotary motion into controlled volumetric displacement within a sealed chamber. This architecture ensures stable vacuum generation across a wide range of process conditions, making it suitable for routine benchtop vacuum tasks including rotary evaporation, vacuum filtration, solvent removal, freeze-drying support, and low-pressure crystallization. Designed for continuous duty cycles under ambient laboratory conditions (15–35 °C, <80% RH), the MP-201Z delivers repeatable performance with minimal maintenance requirements.

Key Features

• Oil-free operation with chemically inert PTFE diaphragm and EPDM/PTFE composite valves—compatible with aggressive solvents, acids, bases, and moderately volatile organics
• Robust brushed AC motor (180 W, 1300 rpm) optimized for thermal stability and long service life under sustained load
• Ultimate vacuum capability of 0.0992 MPa (8 mbar), sufficient for most non-ultrahigh vacuum laboratory processes
• Stable pumping speed of 25 L/min at atmospheric inlet pressure—enabling rapid system evacuation and efficient solvent recovery
• Compact footprint (300 × 230 × 170 mm) and lightweight design (10 kg) for flexible placement on fume hoods, rotary evaporator stands, or shared lab benches
• Integrated thermal overload protection and vibration-dampening rubber feet for safe, quiet operation (<55 dB(A))
• Standard Ø6 mm inlet port with compatible hose barb fitting; optional vacuum gauge port available for real-time pressure monitoring

Sample Compatibility & Compliance

The MP-201Z is routinely deployed in applications involving corrosive, toxic, or flammable vapors—including hydrochloric acid fumes, acetone, methanol, ethyl acetate, and aqueous alkaline solutions. Its all-dry, seal-less pumping mechanism avoids internal lubricants that could degrade or react with such media. While not certified for Class I, Division 1 hazardous locations, its construction meets fundamental safety expectations for general laboratory use per IEC 61010-1:2010 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use). Materials comply with EU RoHS Directive 2011/65/EU restrictions on hazardous substances. Users performing GLP- or GMP-aligned workflows should implement documented calibration checks (e.g., using a traceable digital vacuum gauge) and maintain logbooks for pump runtime and servicing intervals.

Software & Data Management

The MP-201Z operates as a standalone analog device with no embedded firmware, touchscreen interface, or data logging capability. It features a single-pole, single-throw (SPST) power switch and requires manual integration into larger vacuum systems. For laboratories requiring audit-ready records, external pressure transducers (e.g., capacitance manometers calibrated to NIST-traceable standards) may be connected via the optional gauge port. When used in regulated environments subject to FDA 21 CFR Part 11, users must validate the entire vacuum circuit—including tubing, traps, and receivers—as part of their instrument qualification (IQ/OQ/PQ) protocol. No software drivers or USB connectivity are provided.

Applications

• Rotary evaporation of heat-sensitive compounds under reduced pressure
• Vacuum-assisted gravity filtration of precipitates from acidic or basic reaction mixtures
• Short-path distillation setups requiring moderate vacuum stability
• Desiccator evacuation for moisture-sensitive reagents and hygroscopic solids
• Support vacuum for cold traps in cryogenic condensation systems
• Pre-concentration of biological samples prior to LC-MS analysis
• Low-pressure drying of thin-film coatings and polymer films

FAQ

Is the MP-201Z suitable for pumping hydrogen sulfide or chlorine gas?
No. While chemically resistant, this pump is not rated for highly oxidizing, reducing, or pyrophoric gases. Consult material compatibility charts (e.g., Parker Hannifin’s “Chemical Resistance Guide”) before exposure to reactive gases.
Can the pump be operated continuously for 24 hours?
Yes—within ambient temperature limits (≤35 °C) and with adequate ventilation. Continuous operation beyond 8 hours warrants periodic inspection of diaphragm integrity and motor housing temperature.
Does it include a built-in vacuum regulator or pressure controller?
No. Pressure control must be achieved externally via needle valves or electronic vacuum controllers installed downstream of the pump outlet.
What maintenance is required?
Diaphragm replacement every 6–12 months under typical usage; valve inspection every 3 months; inlet filter cleaning after each use with particulate-laden vapors.
Is a vacuum trap recommended?
Yes—especially when condensable vapors (e.g., solvents) are present. A cold trap or inline desiccant/chemical trap prevents condensate ingress and extends diaphragm service life.