Leak-Free Coupling Stainless Steel Magnetic Pump Chemical Pump

Industry: Petroleum, Chemical, Pharmaceutical, New Energy, Pesticide & Fertilizer, Food, Printing & Dyeing

Material: Stainless Steel 304, 304L, 316, 316L, etc.

Application: Ideal equipment for conveying flammable, explosive, volatile, toxic, precious, and various corrosive liquids in industries such as petroleum, chemical, pharmaceutical, electroplating, environmental protection, food, film processing, water treatment, and national defense.

Product Overview

RMD/RMI Stainless Steel Magnetic Drive Centrifugal Pump (referred to as magnetic pump) primarily features the use of a magnetic coupler. When the outer magnet rotates, magnetic lines of force pass through the gap and isolation sleeve to act on the inner magnet, synchronizing the pump shaft with the motor rotation and transmitting torque without contact. At the power input end of the pump shaft, since the liquid is enclosed within a stationary isolation sleeve without dynamic seals, it completely eliminates the unavoidable leakage, dripping, and spillage phenomena in the petrochemical industry, ensuring zero leakage. This type of pump is suitable for conveying toxic, harmful, flammable, explosive, and precious liquid media, making it an ideal choice for creating leak-free and pollution-free workshops and factories.

Application Fields

The RMD/RMI series magnetic pumps are suitable for industries such as petroleum, chemical, pharmaceutical, electroplating, environmental protection, food, film processing, water treatment, and national defense. They are ideal equipment for conveying flammable, explosive, volatile, toxic, precious, and various corrosive liquids.

Operating Environment

The RMD/RMI series magnetic pumps primarily use austenitic stainless steel for their wetted parts, but can also be lined with non-metallic materials or thermosetting plastics. These pumps, collectively referred to as metal magnetic pumps, are suitable for conveying liquids without ferromagnetic particles or fibers, with a maximum pressure of 1.6 MPa, temperature not exceeding 120°C, and viscosity not greater than 30×10⁻⁶ m²/s. For systems with medium pressure exceeding 1.6 MPa, temperature above 120°C, or requiring insulation measures, custom design and manufacturing are available.

Performance Range (Rated Point)

Inlet Diameter: 32-300 mm

Flow Rate: 3.2-1000 m³/h

Head: 8-150 m

Temperature: -20°C to +120°C (customizable up to +120°C to +350°C as needed)

Pressure: 0-1.6 MPa (customizable up to 1.6-30 MPa as needed) Rotation: Clockwise from motor direction

Power: 1.1-315 kW

These are standard parameter ranges. For requirements beyond these, please contact our company for accurate selection.

Structure Diagram

The RMD/RMI magnetic pump mainly consists of components such as the pump body, impeller, pump shaft, bearings, bearing housing, isolation sleeve, thrust ring, connection frame, and magnetic drive.

See structure diagram for details:

Structural Features

+ Single-stage, single-suction horizontal centrifugal pump.

+ Hydraulic components designed using CFD computational fluid dynamics, featuring wide flow channels, high efficiency, excellent cavitation performance, and low radial force.

+ Wetted parts use precision-cast molds for accurate dimensions, clean and smooth flow channels, and high efficiency.

+ Utilizes high-performance, high-temperature-resistant permanent magnet materials to ensure sufficient magnetic torque.

+ Low-eddy-current isolation sleeve design for higher pump efficiency.

+ Modular component design with good interchangeability.

+ Sliding bearings and pump shaft made of high-hardness, high-wear-resistant, high-corrosion-resistant pressureless sintered silicon carbide. Unique double-bearing centering and positioning structure design, combined with hydrodynamic lubrication, ensures reliable pump operation and extended bearing life.

+ Special lubrication and cooling design: Internal circulation fluid removes heat generated by eddy currents in the isolation sleeve and lubricates sliding bearings, automatically balancing axial forces to ensure safe pump operation. Rational structural design ensures all internal circulation systems have sufficient pressure and flow for stable operation.

+ Isolation sleeve capable of fully draining the medium (during shutdown maintenance) and automatic venting (during priming before startup), generally made of high-quality stainless steel using advanced processes.

+ Cooling, heating, insulation, or quick-disassembly devices can be added as per operational needs.

Model Description:

Protection Devices:

1. Load Controller: Monitors the motor's power consumption and can preset a safe operating range. In cases of low load due to cavitation, flow interruption, or magnetic drive slippage, or overload due to mechanical contact of rotating parts, it automatically cuts off power to stop the pump, preventing further damage.

2. Temperature Sensor: Indirectly monitors the temperature of the internal circulation system by detecting the temperature of the isolation sleeve. If the temperature exceeds the set range, it can trigger an alarm or send an electrical signal to cut off power, protecting the equipment.

3. Dual Isolation Sleeve Design: Allows monitoring of leakage between inner and outer isolation sleeves via leakage detection instruments, ensuring reliable operation of the magnetic pump in more demanding conditions.