**Features and Applications of Fluoroplastic Magnetic Drive Pumps**
1. These pumps replace dynamic seals with static seals, keeping the flow-path components completely enclosed. This effectively eliminates issues such as spraying, leaking, and dripping that are unavoidable with the mechanical seals found in other pumps.
2. The wetted parts (flow-path components) are made from materials such as fluoroplastics, ceramics, and fluoroelastomers. Consequently, the pumps offer a wide application range, excellent corrosion resistance, high mechanical strength, resistance to aging, and no toxic decomposition.
3. They feature a compact structure, attractive appearance, and small footprint. They operate smoothly and reliably with low noise and are easy to use and maintain. The pump casing is made of metal, allowing the pump body to withstand pipeline loads and mechanical impacts.
4. They are used in sectors such as chemicals, petrochemical refining, electroplating, hydrometallurgy, film processing, pharmaceuticals, fertilizers, and the military industry. They handle fluids including strong acids, strong alkalis, rare/precious metals, toxic substances, and flammable/explosive liquids, and serve as components for circulating water treatment equipment and filtration systems.
Fluoroplastic magnetic drive pumps consist of three main parts: the pump head, the magnetic drive unit, and other components. The pump head assembly comprises the impeller, pump body (volute/discharge chamber), bearings, shaft sleeves, pump cover, and pump shaft. Key operational precautions include:
1. If the pumped medium contains solid particles, a filter screen must be installed at the pump inlet; if ferromagnetic particles are present, a magnetic filter is required.
2. If the pumped liquid is prone to sedimentation or crystallization, the pump should be cleaned promptly after use, and any residual liquid drained from the pump. 3. The bearings of fluoroplastic magnetic drive pumps are cooled and lubricated by the pumped medium; therefore, dry running is strictly prohibited. Care must also be taken to avoid no-load operation when restarting the pump following a power outage during use.
4. The pumped medium and its temperature must fall within the limits specified for the pump materials. Operating temperatures are <60°C for engineering plastic pumps and <100°C for metal pumps. The pump is designed for liquids free of hard particles and fibers, with an inlet pressure ≤0.2 MPa, a maximum working pressure of 1.6 MPa, a density ≤1600 kg/m³, and a kinematic viscosity ≤30×10⁻⁶ m²/s. A filter screen must be installed at the pump inlet; if the medium contains ferromagnetic particles, a magnetic filter is required. Additionally, the ambient operating temperature should be below 40°C, and the motor temperature rise must not exceed 75°C.
5. After 500 hours of operation, the bearings and the dynamic face rings should be inspected for wear. If the clearance between the bearing and the shaft sleeve exceeds 0.5–1 mm, or if the axial movement of the impeller exceeds 1.5–2 mm, the bearings and dynamic rings must be replaced.
We hope you have gained some valuable insights from the information above regarding the features, applications, and operational precautions for fluoroplastic magnetic drive pumps.