Great Wall MP-401C Diaphragm Vacuum Pump
| Brand | Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | MP-401C |
| Pump Type | Diaphragm Vacuum Pump |
| Oil-Free Design | Yes |
| Ultimate Vacuum | 0.098 MPa (absolute) |
| Pumping Speed | 45 L/min |
| External Dimensions | 195 W × 440 D × 310 H mm |
| Net Weight | 23 kg |
| Motor Power | 300 W |
Overview
The Great Wall MP-401C Diaphragm Vacuum Pump is an oil-free, laboratory-grade vacuum source engineered for reliable, low-maintenance operation in chemical synthesis, solvent removal, rotary evaporation, and fractional distillation workflows. Utilizing a precision-engineered PTFE-coated diaphragm and corrosion-resistant stainless steel valves, the MP-401C generates stable vacuum levels up to 0.098 MPa (absolute), equivalent to ~20 mbar residual pressure—sufficient for most standard evaporation and degassing applications under ambient conditions. Its sealed, dry-running architecture eliminates oil contamination risks, making it ideal for applications requiring clean vacuum environments, including pharmaceutical R&D, analytical sample preparation, and GLP-compliant laboratories where hydrocarbon residue must be avoided.
Key Features
- Oil-free diaphragm design ensures zero hydrocarbon backstreaming and eliminates routine oil changes or disposal concerns.
- Chemically resistant wetted parts—including PTFE diaphragm, EPDM valves, and stainless steel pump head—enable safe handling of mildly aggressive solvents such as acetone, ethanol, ethyl acetate, and dichloromethane.
- Compact footprint (195 × 440 × 310 mm) and lightweight construction (23 kg) support benchtop integration and mobility across shared lab spaces.
- Thermally protected 300 W induction motor delivers consistent pumping speed of 45 L/min at inlet, with low noise emission (<62 dB(A)) suitable for open-lab environments.
- Integrated pressure relief valve and thermal cut-off switch enhance operational safety during extended duty cycles or accidental system blockage.
Sample Compatibility & Compliance
The MP-401C is compatible with standard laboratory vacuum interfaces (e.g., 1/4″–3/8″ hose barbs, ISO-KF 16/25 adapters via optional fittings) and integrates seamlessly with rotary evaporators (e.g., Buchi, IKA, Yamato), vacuum ovens, filtration manifolds, and cold traps. While not certified to UL/CE for standalone industrial use, its construction adheres to general electrical safety principles aligned with IEC 61010-1 for laboratory equipment. For regulated environments, the pump supports documentation of maintenance logs and performance verification per internal SOPs—though it does not include built-in audit trail or 21 CFR Part 11 compliance features, as typical for non-data-logging benchtop vacuum sources.
Software & Data Management
The MP-401C operates as a manually controlled, analog vacuum source with no embedded microprocessor, digital display, or communication interface (e.g., RS-232, USB, or Ethernet). Vacuum level is monitored externally using a connected analog or digital vacuum gauge. Users may log operating time, maintenance intervals (e.g., diaphragm replacement every 5,000–8,000 hours depending on duty cycle and chemical exposure), and observed performance trends in laboratory notebooks or LIMS-compatible spreadsheets. No proprietary software or driver installation is required.
Applications
- Rotary evaporation of heat-sensitive compounds under reduced pressure
- Vacuum filtration of crystalline precipitates or fine particulates
- Deaeration of polymer solutions and resin mixtures prior to casting or curing
- Concentration of aqueous and organic extracts in natural product isolation
- Evacuation of Schlenk lines during inert-atmosphere reaction setup (when paired with appropriate gas manifold)
- Supporting vacuum drying in desiccators and low-temperature lyophilization pre-chilling stages
FAQ
What is the ultimate vacuum level achievable with the MP-401C?
The MP-401C achieves an ultimate absolute pressure of 0.098 MPa (~20 mbar), measured at the inlet under standard laboratory conditions (23°C, dry air). Actual performance may vary slightly with ambient temperature, altitude, and system conductance.
Can this pump handle corrosive vapors from HCl or HF?
No. While the PTFE diaphragm and EPDM valves offer resistance to common organic solvents and mild acids, the MP-401C is not rated for continuous exposure to strong mineral acids (e.g., HCl, HF, HNO₃) or halogenated solvents beyond short-term incidental contact. For such applications, chemically resistant pumps with Hastelloy components or fluoropolymer-coated motors are recommended.
Is the MP-401C suitable for continuous 24/7 operation?
It is designed for intermittent to medium-duty use (up to 8–10 hours/day). Continuous unattended operation is not advised without external thermal monitoring and periodic inspection of diaphragm integrity and valve seating.
Does the pump require regular lubrication?
No. As an oil-free diaphragm pump, it contains no internal lubricants. Maintenance is limited to periodic inspection of the diaphragm, valves, and inlet filter—typically every 6–12 months depending on usage intensity and vapor load.
What vacuum gauge is recommended for accurate pressure readout?
A calibrated capacitance manometer (e.g., MKS Baratron series) or a digital Pirani gauge with temperature compensation is recommended for precise measurement within the 1–100 mbar range. Analog Bourdon gauges are insufficient for reproducible low-pressure quantification.
