The Great Wall MP-201ZA Oil-Free Diaphragm Vacuum Pump
| Brand | The Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Direct Manufacturer |
| Product Type | Oil-Free Diaphragm Pump |
| Model | MP-201ZA |
| Power | 180 W |
| Voltage/Frequency | 220–240 V~, 50 Hz |
| Ultimate Vacuum | 0.0992 MPa (≈ 8 mbar) |
| Maximum Pumping Speed | 25 L/min |
| Inlet/Outlet Port Diameter | Ø10 mm |
| Operating Temperature Range | 5–35 °C |
| Relative Humidity Limit | ≤70% RH |
| IP Rating | IP20 |
| Pollution Degree | 2 |
| Dimensions (W×D×H) | 310 × 225 × 168 mm |
| Weight | 10 kg |
| Recommended Tubing | Silicone Rubber Hose, Ø12 × Ø6 mm |
Overview
The Great Wall MP-201ZA is a compact, oil-free diaphragm vacuum pump engineered for reliable, contamination-free vacuum generation in analytical and preparative laboratory workflows. Utilizing a corrosion-resistant PTFE-coated diaphragm and stainless steel valve assembly, it operates on positive displacement principle—where reciprocating motion of the diaphragm creates cyclic expansion and compression of the gas chamber to evacuate air or vapor without lubricant contact. This architecture eliminates hydrocarbon backstreaming, making it ideal for applications demanding high-purity vacuum environments, such as solvent removal under reduced pressure, rotary evaporation, vacuum filtration, and degassing of sensitive liquid samples. Its sealed motor and thermally protected design ensure stable operation across extended duty cycles within ambient lab conditions (5–35 °C, ≤70% RH), conforming to IEC 61000-6-3 (EMC emission) and IEC 60335-1 (safety) requirements for laboratory equipment.
Key Features
- Oil-free operation ensures zero hydrocarbon contamination—critical for GC sample preparation, pharmaceutical intermediate handling, and analytical chemistry workflows where residual oil could compromise detector sensitivity or column integrity.
- PTFE-coated diaphragm and chemically resistant valve materials provide compatibility with mild organic solvents (e.g., acetone, ethanol, ethyl acetate) and aqueous solutions, extending service life under routine use.
- Compact footprint (310 × 225 × 168 mm) and lightweight construction (10 kg) facilitate benchtop integration, mobile cart mounting, or placement beneath fume hoods without structural reinforcement.
- Thermal overload protection and automatic shutdown prevent motor damage during sustained load or elevated ambient temperatures.
- IP20-rated enclosure offers basic protection against solid ingress—suitable for controlled indoor laboratory environments per IEC 60529; pollution degree 2 classification aligns with typical lab particulate and condensate exposure levels.
- Standard Ø10 mm push-fit inlet/outlet ports enable rapid connection to common vacuum tubing (e.g., silicone rubber Ø12 × Ø6 mm) without adapters or sealing compounds.
Sample Compatibility & Compliance
The MP-201ZA is validated for continuous operation with non-corrosive, non-explosive gases and vapors generated during standard lab procedures—including water, methanol, dichloromethane, and toluene vapors at partial pressures below their saturation points. It is not rated for use with strong oxidizers (e.g., nitric acid fumes), halogenated solvents above 10% concentration, or acidic gases (e.g., HCl, SO₂) without optional chemical-resistant upgrades. As a Class II electrical device per IEC 61010-1, it supports GLP-compliant documentation when paired with calibrated vacuum gauges and loggers. While not intrinsically safe, its design meets general-purpose safety standards for non-hazardous area deployment in academic, QC, and R&D laboratories.
Software & Data Management
The MP-201ZA operates as a standalone analog device with no embedded microcontroller or digital interface. Vacuum level monitoring requires external instrumentation—such as analog Bourdon-tube gauges, capacitance manometers (e.g., MKS Baratron series), or digital vacuum controllers (e.g., Leybold DigiLine). For audit-trail compliance in regulated environments (e.g., FDA 21 CFR Part 11), users may integrate it into programmable vacuum systems via relay-based start/stop control signals, enabling time-stamped operational logs when used with SCADA or LabVIEW-compatible DAQ hardware.
Applications
- Rotary evaporation support: Provides stable vacuum down to 8 mbar for efficient low-temperature solvent recovery from heat-sensitive compounds.
- Vacuum filtration: Enables rapid separation of precipitates or cell pellets using Buchner funnels or membrane filter holders.
- Desiccator evacuation: Maintains sub-atmospheric conditions for moisture-sensitive material storage or crystallization studies.
- Gas sampling preparation: Assists in drawing representative headspace samples for GC-FID or GC-MS analysis.
- Thin-film deposition pre-evacuation: Supports initial chamber conditioning prior to sputtering or thermal evaporation processes.
FAQ
What is the ultimate vacuum level achievable with the MP-201ZA?
The pump achieves an ultimate pressure of 0.0992 MPa absolute (approximately 8 mbar), measured at sea level under ISO 21360-1 test conditions with clean, dry air.
Can this pump handle corrosive vapors such as HCl or HF?
No—standard configuration lacks chemical resistance to strong acids or halogens. Optional fluoropolymer-coated internal components are required for such applications.
Is the MP-201ZA suitable for continuous 24/7 operation?
It is rated for intermittent duty (duty cycle ≤ 70%); continuous operation beyond 8 hours/day requires active cooling and periodic maintenance per the manufacturer’s service schedule.
Does the pump include vacuum gauge or pressure regulation?
No—vacuum measurement and control must be implemented externally using compatible analog or digital instrumentation.
What maintenance intervals are recommended?
Diaphragm and valve kit replacement is advised every 6,000 operating hours or annually—whichever occurs first—under typical laboratory usage profiles.
