Iwaki WMD-30RZT-220 Magnetic Drive Pump
The Iwaki WMD-30RZT-220 is a compact, seal-less centrifugal pump built for applications where reliability and cleanliness matter just as much as performance. Rather than relying on a traditional shaft seal, this pump uses magnetic coupling to drive the impeller, which means there's nothing to leak and very little to wear out over time. That design choice alone makes it a favorite for engineers and technicians who are tired of replacing mechanical seals or dealing with drips around pump housings.
Constructed from GFRPP polypropylene, the WMD-30RZT-220 stands up well to a wide range of process fluids while staying lightweight and corrosion resistant. It's paired with a 1/16 HP, 220 volt single-phase motor and finished with 3/4 inch NPT threaded ports, so it drops into existing plumbing without a lot of fuss. Inside, a hollow rotating spindle creates an internal cooling circuit that keeps bearing temperatures in check, and a twin bearing system handles thrust loads so the pump keeps running smoothly even during long duty cycles.
While it's a natural fit for marine and industrial fluid transfer, this pump shows up just as often in laboratory, medical, and precision equipment settings, think chillers, blood analyzers, laser systems, and other applications where quiet operation and consistent flow are non-negotiable. Its compact footprint and low noise output make it easy to integrate into equipment where space and sound are both at a premium.
Key Features
- Magnetically coupled, seal-less design eliminates leak points
- GFRPP polypropylene body and impeller resist corrosion
- Hollow rotating spindle with internal cooling circuit reduces bearing temperature
- Twin bearing system supports thrust loads and extends service life
- Compact, quiet, energy-efficient operation
- Few moving parts for simplified maintenance
Applications
- Chemical and process fluid transfer
- Recirculation systems
- Chiller and cooling loop circulation
- Laser system fluid handling
- Blood analyzer and medical equipment
- General industrial and laboratory fluid handling
Specifications
- Catalog number: WMD-30RZT-220
- Pump type: Magnetic drive centrifugal pump
- Body/impeller material: GFRPP polypropylene
- Motor: 1/16 HP, 220 VAC, 1 Phase
- Port size: 3/4 inch NPT threaded
- Bearing: PPS bearing with alumina ceramic thrust ring and spindle
FAQ Section
Q: Is the Iwaki WMD-30RZT-220 self-priming?
A: No, this pump is not self-priming, so the suction side of the system should be flooded before startup to avoid dry running damage.
Q: What fluids are compatible with the WMD-30RZT-220?
A: Since the pump uses magnetic coupling, it's best suited for fluids free of iron, nickel, or other magnetic particulates that could interfere with the drive magnets.
Q: Can this pump run continuously?
A: Yes, its internal cooling circuit and twin bearing design are built specifically to support continuous or long-duty-cycle operation without overheating.
Q: Does the WMD-30RZT-220 require regular seal maintenance?
A: No, because it has no mechanical shaft seal, there's no seal to replace, which significantly reduces routine maintenance needs.
Q: Is this pump only used in marine settings?
A: No, while it works well in marine and industrial systems, it's also widely used in laboratory, medical, and precision cooling equipment where quiet, leak-free operation is essential.
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