The Great Wall MP-201ZA PTFE-Lined Diaphragm Vacuum Pump

Overview

The Great Wall MP-201ZA is an oil-free, chemically resistant diaphragm vacuum pump engineered for precision and reliability in demanding laboratory environments. It operates on positive displacement principle via a flexible PTFE/FKM composite diaphragm actuated by an eccentric cam mechanism—eliminating the need for lubricating oil and preventing contamination of vacuum lines or process gases. Its ultimate vacuum performance of 8 mbar (0.0992 MPa) and stable pumping speed of 25 L/min at atmospheric pressure make it suitable for applications requiring clean, dry, and corrosion-resistant vacuum generation—including rotary evaporation, vacuum filtration, degassing, freeze drying support, and inert atmosphere purging. Unlike water-ring or rotary vane pumps, the MP-201ZA delivers consistent performance independent of ambient temperature or working fluid properties, ensuring reproducibility across variable lab conditions.

Key Features

• Chemically inert wetted parts: Pump chamber, internal tubing, and valves constructed from PTFE; ensures compatibility with aggressive solvents, acids, and bases.
• High-performance valve assembly: PEEK (polyether ether ketone) reed valves offer superior thermal stability, mechanical resilience, and chemical resistance over standard elastomeric alternatives.
• Composite diaphragm: Dual-layer construction combining PTFE surface integrity with FKM (fluoroelastomer) elasticity enables extended service life under cyclic stress and exposure to corrosive vapors.
• Integrated gas ballast (air bleed) valve: Facilitates continuous removal of condensable vapors—particularly beneficial during solvent evaporation workflows where water or low-boiling organics may accumulate in the pump head.
• Upstream particulate and moisture filtration: A replaceable sintered stainless steel or hydrophobic membrane filter protects the diaphragm and valve train from solid particulates and liquid ingress, reducing maintenance frequency and downtime.
• Compact footprint and portability: Weighing only 10 kg with dimensions of 310 × 225 × 168 mm, the unit fits seamlessly beneath fume hoods, on benchtops, or inside integrated systems without compromising ergonomics or spatial efficiency.

Sample Compatibility & Compliance

The MP-201ZA is designed for use with non-explosive, non-toxic, and non-particulate-laden gases typical in academic, pharmaceutical, and analytical chemistry laboratories. Its material selection complies with ISO 8573-1 Class 2 purity requirements for compressed air quality (adapted to vacuum service), and its oil-free architecture supports GLP-compliant documentation protocols where hydrocarbon contamination must be excluded. While not intrinsically rated for hazardous area operation, the pump meets IEC 61000-6-3 (EMC emission) and IEC 61000-6-2 (immunity) standards. Its IP20 enclosure rating indicates protection against solid objects ≥12.5 mm but no moisture resistance—therefore installation in dry, well-ventilated indoor environments within 5–35 °C ambient range is recommended per manufacturer specifications.

Software & Data Management

As a standalone analog-operated device, the MP-201ZA does not incorporate embedded firmware, digital interfaces, or data logging capabilities. It features a single-pole single-throw (SPST) mains switch and requires manual control via external relays or foot switches when integrated into automated systems. For labs operating under FDA 21 CFR Part 11 or EU Annex 11 requirements, users may implement external validation protocols—including periodic verification of ultimate vacuum using calibrated Pirani or capacitance manometers—and maintain logbooks for operational hours, filter replacement, and diaphragm inspection intervals. Documentation packages—including CE Declaration of Conformity, RoHS compliance statements, and material safety data sheets (MSDS) for PTFE, PEEK, and FKM components—are available upon request from The Great Wall’s technical support team.

Applications

• Rotary evaporation of heat-sensitive compounds under reduced pressure
• Vacuum-assisted filtration of corrosive or volatile filtrates (e.g., acidic aqueous solutions, chlorinated solvents)
• Preparation of air- or moisture-sensitive samples prior to NMR, XRD, or SEM analysis
• Support vacuum for lyophilizers, vacuum ovens, and desiccators in QC/QA labs
• Gas sampling and blanking in environmental monitoring setups where oil carryover would compromise GC-MS or FTIR detection sensitivity
• Integration into custom-built reaction manifolds for Schlenk-line alternatives in teaching and research laboratories

FAQ

Is the MP-201ZA suitable for continuous-duty operation?
Yes—designed for intermittent or extended duty cycles up to 8 hours/day, provided ambient temperature remains within 5–35 °C and relative humidity stays below 70%. Thermal cut-off protection is built into the 180 W motor.
Can this pump handle solvent vapors such as acetone or dichloromethane?
It can tolerate short-term exposure when used with the gas ballast valve open and upstream cold traps; however, prolonged operation with high vapor loads may accelerate diaphragm fatigue. Use of PTFE-lined traps and condensers is strongly advised.
What maintenance intervals are recommended?
Inspect inlet filter monthly; replace every 6 months or after 1,000 operating hours. Diaphragm and PEEK valves should be assessed annually or after 3,000 hours—replacement kits are available directly from The Great Wall.
Does the pump require calibration?
No routine calibration is required, but ultimate vacuum verification using a traceable reference gauge is recommended quarterly in regulated environments to ensure ongoing conformance with SOP-defined thresholds.
Is the MP-201ZA compliant with international export regulations?
Yes—the unit carries CE marking, complies with RoHS 2011/65/EU, and conforms to REACH SVHC screening criteria. Export documentation, including Certificate of Origin and EUR.1 forms, can be supplied for customs clearance in EU, ASEAN, and Mercosur markets.