We supply high-performance magnetic drive pumps designed for zero-leakage fluid transfer. Our sealless magnetic drive pumps utilize fluoroplastic alloy and stainless steel construction to handle highly corrosive, toxic, and volatile chemicals safely and economically.
| Model Series | Material Configuration | Flow Rate (m³/h) | Head (m) | Operating Temp (°C) | Design Pressure |
|---|---|---|---|---|---|
| CQB Series Fluoroplastic Magnetic Pump | Cast Iron Housing + F46/FEP Lining | 0.6 - 100 | 2 - 80 | -20 to 100 | 1.6 MPa |
| ZMD Series Self-Priming Magnetic Pump | Cast Iron Housing + F46/FEP Lining | 3 - 60 | 20 - 48 | -20 to 80 | 1.6 MPa |
| CQL Series Stainless Steel Magnetic Pump | Stainless Steel (304 / 316L) | 3.2 - 100 | 20 - 80 | -30 to 180 | 1.6 MPa |
Note: Above figures represent standard operations at 2900 r/min. Please contact our technical team for custom configurations, exact efficiency curves, and high-temperature magnet assembly options.
Pump selection starts with the fluid. Whether you are handling highly concentrated sulfuric acid, volatile solvents, or precious liquids, our engineering team maps your flow, head, and medium requirements directly against our chemical resistance databases. Below are typical applications where our magnetic drive pumps maintain continuous operation.
Pumping of acids, alkalis, and solvents classified as toxic, flammable, or environmentally restricted, where any leakage is unacceptable.
Precise dosing and circulation of corrosive reactants in pharmaceutical and agrochemical synthesis, ensuring absolute containment.
Plating-solution circulation, chemical cleaning, and rinse-water transfer in electroplating and anodising lines using sealless magnetic drive pumps.
Transfer of volatile, precious, or easily-contaminated liquids in specialty chemical and photoresist processes, eliminating contamination risks.
With over 20 years specializing in fluoroplastic and stainless steel corrosion-resistant pumps, our in-house sintering, lining, and machining lines ensure consistent quality from cast to the finished magnetic pump.
YFTEL manufactures corrosion-resistant pumps, valves and piping at a 26,000 m² production base in Anhui, with international trade operations headquartered in Hangzhou. The factory runs 200 sets of production equipment, employs 200+ staff including 30+ fluid engineers, and ships over 32,000 pump and valve units per year across 10 series and 300+ models. Production is ISO9001 certified, products carry CE marking, and exports currently reach customers in 30+ countries.
About Us ENGINEERING CASES SolutionsThe motor drives an outer magnet ring; torque passes through a non-magnetic isolation sleeve to an inner magnet ring attached to the impeller. Because the shaft does not penetrate the pump chamber, there is no dynamic seal to leak—only static O-ring seals remain.
Dry running must be avoided. Without liquid, the internal bushing and sleeve lose lubrication and cooling, leading to rapid wear. We recommend a flow/no-flow sensor and the use of silicon-carbide bearings for marginal-lubrication robustness.
The standard CQB magnetic water pump uses an engineering-grade or metal isolation sleeve. For maximum efficiency and to eliminate eddy currents, we offer an all-fluoroplastic sleeve option. Please tell us your medium and pressure for proper selection.
Standard F46 construction is rated to about 100°C. For higher temperatures, we can configure PFA wetted parts and a high-temperature magnet assembly. Please specify your operating temperature when requesting a quote.
In chemical processing, metallurgy, and pharmaceutical manufacturing, fluid containment is a critical safety and environmental priority. Conventional dynamic shaft seals, even when well-maintained, are susceptible to eventual wear and fugitive emissions. To address this, the magnetic drive pump was developed. By utilizing a static containment shell instead of a dynamic mechanical seal, these sealless magnetic drive pumps provide a true zero-leakage solution for hazardous, toxic, and highly valuable liquids.
A magnetic pump operates on the same basic hydraulic principles as a standard centrifugal pump but differs fundamentally in its power transmission. Instead of a direct mechanical connection between the motor shaft and the pump impeller, a magnetic coupling is employed. An outer magnetic rotor is attached to the motor shaft, while an inner magnetic rotor is embedded within the impeller assembly. A stationary isolation sleeve separates the two rotors. As the motor turns the outer magnet, the magnetic flux transmits torque through the isolation sleeve, causing the inner magnet and impeller to rotate simultaneously. This design entirely removes the need for a shaft penetration through the pump casing.
The primary advantage of a mag drive centrifugal pump is absolute fluid containment. This is essential when handling liquids that crystallize on contact with air, highly toxic compounds, or explosive solvents where any vapor release poses a severe safety hazard.
To withstand aggressive chemical attack, the wetted components of a magnetic drive pump must be carefully selected. While stainless steel is suitable for mild chemicals, severe applications require non-metallic solutions.
Fluoroplastic alloy (such as F46 or FEP) is heavily utilized in high-performance magnetic pumps. The pump body is typically constructed from a robust cast iron or steel armor, lined with the fluoroplastic material. This combination provides the mechanical strength of metal and the near-universal chemical inertness of fluoropolymers. Such pumps can reliably transfer any concentration of sulfuric acid, hydrochloric acid, nitric acid, and strong oxidizers, often providing corrosion resistance comparable to exotic metals like Hastelloy or titanium at a much lower capital cost.
Two components define the reliability of a magnetic drive pump: the isolation sleeve (containment shell) and the internal bearing system.
Isolation Sleeve: The sleeve must withstand the system pressure while allowing magnetic flux to pass through. Metallic sleeves are highly durable but generate eddy currents due to the rotating magnetic field, which creates heat and reduces overall efficiency. For temperature-sensitive fluids or maximum efficiency, non-metallic sleeves (such as carbon-fiber-reinforced fluoroplastics) are used to completely eliminate eddy current losses.
Internal Bearings: Because the pump shaft does not extend outside the casing, the internal rotor must be supported by bearings submerged in the pumped fluid. Silicon carbide (SiC) is the industry standard due to its exceptional hardness and chemical resistance. However, SiC bearings rely on the pumped fluid for lubrication and cooling. Therefore, dry running is the most common cause of failure in magnetic pumps and must be strictly avoided through proper system design and monitoring.
Operating a magnetic water pump or chemical pump requires adherence to specific guidelines to ensure longevity:
Dry Run Protection: Always ensure the pump is fully primed before starting. Installing a flow switch or a motor power monitor can automatically shut down the pump if flow is lost, protecting the internal silicon carbide bearings from thermal shock and shattering.
Solids Handling: Standard magnetic drive pumps are designed for clean liquids. Solid particles can easily become trapped in the tight clearances between the inner magnetic rotor and the isolation sleeve, or damage the plain bearings. If the medium contains solids, it is crucial to use an upstream strainer or consult the manufacturer for specialized slurry configurations.
Decoupling: If the pump experiences a sudden jam or excessive load (such as a high-density fluid exceeding the design specifications), the magnetic coupling may "slip" or decouple. While this protects the motor from overloading, the pump must be stopped immediately to allow the magnets to resynchronize and prevent overheating.
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