Frame Mounted - Flows to 180 GPM - ANSI Dimensions

ETFE or PFA Teflon Wetted Parts

• 1 x 1 1/2 x 6
• 1 1/2 x 3 x 6
• 1 x 1 1/2 x 8

Materials in contact with solution are: 

• ETFE (or PFA) - casing liner and impeller
• Silicon Carbide - impeller bushings
• Kalrez - O-ring
• PTFE - gasket

The MDE series magnetic drive pumps match ANSI B73.1 dimensions and hydraulics to make change out of older mechanically sealed pumps easy, reducing installation time and cost.

MDE pumps are designed and manufactured to heavy-duty standards, which meet high levels of corrosion resistance, durability, efficiency and safety for aggressive and hazardous chemical applications. That puts them on the leading edge in quality, performance, and safety. Look at these important, value-added features:

Expanded range of liner materials – Adding to our standard ETFE material, the MDE is also available in PFA for higher temperature applications.

Higher levels of durability and safety – All fluororesin casing parts are reinforced by ductile cast iron for additional strength.

The MDE’s containment shell cover eliminates eddy currents and prevents any sparks from occurring if the drive magnet ever contacts it. This high-strength, non-metallic cover also reinforces the containment shell, providing a second level of pressure containment.

The MDE not only meets, but also exceeds the call for smart, sealless pumps. Proven monitoring options, selectable for specific applications, include containment shell leak detection, internal bearing temperature indication, drive magnet bearing wear alarm and dry run monitoring.

Simple disassembly and maintenance. Back pullout construction allows MDE internal parts to be checked or replaced without disturbing piping. Components such as bearings and thrust collars can easily be replaced on an individual basis.

1. Containment Shell Cover
2. Inner Magnet
3. Inner Bearings
4. Outer Bearing
5. Casing Cover
6. Front Casing
7. Casing Liner
8. Impeller

2) Inner Magnet – Rare earth (samarium cobalt) magnets produce high torque in all horsepower ranges and have excellent thermal stability.

3&4) The Silicon Carbide (SiC) Inner and Outer Bearings have exceptional durability due to SiC’s high resistance to abrasion, temperature and thermal shock. The inner and outer bearings can be individually replaced.

5) The MDE Casing Cover features an exclusive circulation design (patent pending) to force liquid through the containment shell, increasing the circulation rate to improve bearing cooling, lubrication, and the removal of slurry particles. A bearing temperature monitor and an external flush connection are available as options.

6) Front Casing - The casing is ductile cast iron with a Teflon lining.  Ductile iron provide outstanding strength with vibration dampening.

7) Casing Liner - The casing liner is ETFE as standard and as an option for higher temperature applications, PFA is available.

8) The Impeller features a unique internal metal inset to provide additional mechanical strength for handling high specific gravity fluids and slurries.

Leak Detection – The leak detection sensor is located at the lowest point of the frame to quickly detect if there is any leakage from the containment shell. A signal is activated that can be used to shut the pump down or trigger an alarm. Optional conductivity or fiber optic sensors are available to cover the wide range of applications for which MDE is designed.

External Flush – For slurry or low viscosity applications, an external flush connection has been designed into the casing cover to provide a continuous flow of clean liquid for the bearings. External fluid is forced through the containment shell, continuously purging the inner magnet, bearing and thrust surfaces of slurry particles.

Bearing Wear Sensor – This sensor detects the axial movement of the outer magnet assembly and measures the anti-friction bearing wear before magnet rotation can contact the containment shell cover. As bearing wear increases, the sensor detects the movement and sends a signal to the Pump Guard controller.

Bearing Temperature Monitoring – By constantly measuring the SiC bearing temperature, comparing it against a set value, and sending out a signal when the temperature monitor is able to detect starved suction or cavitation conditions.

Dry Run Monitor – The MDE features a system that monitors and detects motor current draw. This system functions to halt pump operation if motor load exceeds high or low conditions.

Note:  KTH Sales is able to provide larger pumps than are listed above -- Contact us for details.