Great Wall MP-201Z Diaphragm Vacuum Pump

Overview

The Great Wall MP-201Z Diaphragm Vacuum Pump is an oil-free, chemically resistant laboratory vacuum source engineered for precision and reliability in demanding analytical and preparative workflows. Based on positive displacement via a PTFE-diaphragm actuation mechanism, it generates vacuum through reciprocating motion driven by a low-thermal-rise induction motor — eliminating reliance on lubricating oils and avoiding hydrocarbon contamination of sensitive samples or vacuum lines. Its ultimate vacuum of 8 mbar and stable pumping speed of 25 L/min support a broad range of pressure-dependent unit operations including rotary evaporation, fractional distillation, vacuum drying, freeze-drying pre-evacuation, crystallization under reduced pressure, sublimation, and vacuum-assisted filtration. Designed for compatibility with aggressive chemical environments, the MP-201Z is particularly suited for laboratories handling corrosive, toxic, pyrophoric, or moisture-sensitive compounds where inert gas-wetted surfaces and zero oil carryover are non-negotiable requirements.

Key Features

• Oil-free operation ensures zero hydrocarbon contamination — critical for GC sample introduction, mass spectrometry interfaces, and high-purity synthesis setups.
• PTFE-wetted path (diaphragm, valves, chamber interior) provides exceptional resistance to strong acids (e.g., HNO₃, H₂SO₄), alkalis (e.g., NaOH, KOH), halogenated solvents, and oxidizing agents — compliant with ISO 8573-1 Class 0 air purity requirements for process gases.
• Thermally optimized 180 W motor operates at significantly lower surface temperature than conventional diaphragm pumps, reducing thermal stress on adjacent equipment and enhancing long-term bearing and diaphragm life.
• Rigorously validated for >1500 hours of continuous operation under nominal load — supporting GLP-compliant routine use in QC labs and multi-shift research facilities.
• Compact footprint (300 × 230 × 170 mm) and lightweight construction (10 kg) enable flexible benchtop integration, including placement inside fume hoods or gloveboxes.
• Direct replacement for water aspirators and rotary vane pumps — eliminates water consumption, wastewater disposal, and oil maintenance while maintaining comparable vacuum performance across typical lab pressure ranges (10–1000 mbar).

Sample Compatibility & Compliance

The MP-201Z is compatible with vapors and non-particulate gases generated during solvent removal, acid digestion off-gassing, and low-volatility compound handling. It is not intended for particulate-laden, viscous, or condensable vapor streams without upstream cold traps or particulate filters. All gas-contact surfaces conform to USP and ASTM D4295 specifications for fluoropolymer integrity. The pump meets CE marking requirements per EU Machinery Directive 2006/42/EC and Electromagnetic Compatibility Directive 2014/30/EU. While not certified to ATEX or IECEx standards for Zone 1 hazardous areas, its spark-free motor and static-dissipative housing make it suitable for use in general laboratory environments handling Class I flammable vapors when installed with appropriate ventilation and grounding per NFPA 45.

Software & Data Management

The MP-201Z operates as a standalone analog device with no embedded microcontroller or digital interface. It requires no firmware updates, driver installation, or software licensing — ensuring deterministic behavior and audit-trail simplicity for regulated environments. Its passive architecture supports seamless integration into validated systems governed by FDA 21 CFR Part 11, EU Annex 11, and ISO/IEC 17025, where electronic record integrity depends on minimal firmware dependencies. For automated vacuum control, external pressure transducers (e.g., capacitance manometers) and programmable logic controllers (PLCs) may be interfaced via standard 0–10 V or 4–20 mA analog signals — enabling closed-loop setpoint regulation in GMP-compliant evaporation platforms.

Applications

• Routine rotary evaporation of organic solvents (e.g., ethyl acetate, dichloromethane, THF) under controlled vacuum profiles.
• Vacuum drying of hygroscopic APIs and catalysts in stainless-steel ovens per USP <1211> residual solvent protocols.
• Pre-evacuation of lyophilizer chambers prior to primary drying cycles.
• Reduced-pressure crystallization of thermally labile intermediates in pharmaceutical process development.
• Gas scavenging in Schlenk-line setups using inert purge/vacuum cycles.
• Supporting vacuum filtration of aggressive reagents (e.g., CrO₃/H₂SO₄ mixtures, HF-based etchants) in materials science cleanrooms.

FAQ

Is the MP-201Z certified for use in explosive atmospheres?

No — it is not ATEX- or IECEx-certified. Use only in well-ventilated general laboratory spaces meeting local electrical safety codes.
Can this pump handle solvent vapors without condensation protection?

Not recommended. Condensable vapors (e.g., acetone, methanol, DMF) must be trapped upstream using a dry ice/acetone or liquid nitrogen cold trap to prevent diaphragm swelling and valve clogging.
What maintenance intervals are recommended for routine operation?

Diaphragm and valve kits should be inspected every 1,000 operating hours; replacement is advised at 2,000 hours or sooner if pumping speed degradation exceeds 15% or vacuum stability falls outside ±0.5 mbar of baseline.
Does the pump include an integrated vacuum gauge?

No — vacuum monitoring requires an external calibrated gauge (e.g., Pirani or capacitance manometer) connected to the inlet port via a T-fitting.
Is the MP-201Z compatible with vacuum controllers from third-party evaporator manufacturers?

Yes — its analog input/output capability (0–10 V) allows integration with major OEM vacuum control modules, including those from Buchi, IKA, and Yamato, provided signal scaling is configured per manufacturer documentation.