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Product Dewspiption
The Meibao MQ50 Series Stainless Steel Air Operated Diaphragm Pump is a high-flow, heavy-duty fluid transfer solution engineered for the most demanding industrial applications requiring superior corrosion resistance, sanitation, and durability. Constructed from high-quality stainless steel 304, 316, or 316L, this pump offers exceptional resistance to aggressive chemicals, high temperatures, and corrosive environments. Powered entirely by compressed air without electrical components, it is intrinsically safe for handling flammable, explosive, or hazardous media. Featuring a no-shaft-seal design, self-priming capability up to 8m (wet), and the ability to run dry without damage, the MQ50 series ensures reliable, leak-free, and maintenance-friendly operation for chemical processing, mining, wastewater treatment, and heavy industrial fluid transfer applications.
Superior Corrosion Resistance & Durability
Constructed from high-quality stainless steel 304, 316, or 316L with high-temperature wax precision casting, providing excellent corrosion resistance, high strength, and a smooth, sanitary surface .
Explosion-Proof & Safe Operation Powered entirely by compressed air, eliminating the risk of sparks and ensuring safe operation in flammable, explosive, or hazardous environments without electrical components .
Versatile Fluid Handling
Capable of handling fluids with high viscosity, high specific gravity, and containing solid particles up to 2.5mm diameter. Flow and head can be adjusted by changing the intake air volume and pressure .
Superior Self-Priming Performance
Dry self-priming head up to 4m, wet self-priming head up to 7.6m, enabling efficient fluid transfer without manual priming .
Long Service Life & Low Maintenance
Advanced diaphragm design with increased arch height reduces edge stress, and precision-machined valve balls ensure excellent sealing. Wear parts typically require replacement only once a year under normal conditions .
Typical Applications
Chemical Processing: Transfer of acids, alkalis, solvents, and aggressive chemicals .
Wastewater Treatment: Chemical dosing and sludge transfer.
Electroplating & Surface Treatment: Plating solution and chemical bath transfer.
PCB Manufacturing: Etching and developing solution transfer.
Max Flow
35.22
m³/h
Max Head
84
m
Power Range
-
kW
Certification
CE
ATEX Optional
Technical Specifications
Model Range
MQ50
Pump Type
Air-Operated Double Diaphragm Pump
Materials
PP/PVDF
Connection
Threaded (NPT, BSPP)
Max Temperature
-
Max Pressure
-
Voltage
220V / 380V, 3Φ
Warranty
-
Model Coding System
MQ50PPPPEP
MQ50= Series
PP= Pump Body Material
PP= Intermediate Material
EP= Diaphragm Material
Material Options
PP
PP
General chemicals, max-°C
PVDF PVDF
High purity, max-°C
EPDM
EPDM
High temp, max-°C
What is the maximum viscosity the MB pump can handle?
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The MB magnetic drive pump is optimized for low-to-medium viscosity liquids (up to ~200 cPs at operating temperature). For high-viscosity media above 200 cPs, please contact our engineering team — we may recommend a reduced speed operation or a gear pump alternative.
Can the MB pump handle HF acid?
+
Yes. The MB pump with PTFE or PVDF wet-end is fully compatible with hydrofluoric acid at concentrations up to 50% and temperatures up to 80°C. PTFE offers the best HF resistance. For semiconductor-grade HF applications, we recommend our dedicated HF Series with ultra-pure material specifications.
What is the pump's NPSH requirement?
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NPSH requirements vary by model and operating point. Typically, the MB series requires 2-3m NPSHa. We recommend ensuring the available NPSH (NPSHa) from your installation is at least 1m higher than the pump's required NPSHr. Full NPSH curves are available in the product datasheet.
Do you offer ATEX / explosion-proof versions?
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Yes. ATEX Zone 1 and Zone 2 certified models are available for environments where flammable gases or vapors may be present. Please specify the ATEX zone and gas group (IIA, IIB, or IIC) when requesting a quote.
Can I get spare parts for this pump?
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Yes. We stock a comprehensive range of spare parts for the MB series including magnet assemblies, impellers, shaft sleeves, and containment shells. Parts can be shipped within 5-10 working days to most destinations. We recommend ordering a spare parts kit with your initial order for critical applications.
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