Iwaki MD-6Z-220NL High Head Mag Drive Pump, MD6 Series
The Iwaki MD-6Z-220NL is a compact magnetic drive centrifugal pump built for applications where reliability and leak-free operation matter more than raw output. Rather than using a traditional shaft seal, this pump relies on magnetic coupling to transfer energy from the motor to the impeller, which means there's nothing to wear out or leak over time. Its GFRPP polypropylene construction gives it strong resistance to a wide range of chemicals, and the high head impeller configuration is specifically designed to push liquid against greater resistance while operating at a modest, low-flow rate.
Because this is one of Iwaki's smallest pump platforms, it's a natural fit for equipment where space is tight but performance still needs to be dependable. Engineers and OEM integrators often reach for the MD6 series when building laser cooling loops, small chillers, blood analyzers, or precision cleaning systems, since the pump's compact footprint and quiet operation let it disappear into a larger assembly without adding bulk or noise. It's worth remembering that not every application for this pump is water-based or marine — it shows up just as often in medical devices, lab equipment, and industrial process skids.
Running on 220 volts, single phase power at 1/250 horsepower, the MD-6Z-220NL is engineered for continuous duty in light industrial and OEM settings. Its fixed spindle design (rather than a rotating spindle with bearing) simplifies the internal architecture and reduces the number of wear components, which tends to translate into fewer maintenance headaches over the life of the equipment.
Key Features
- Sealless magnetic drive design eliminates shaft seals and leak points
- GFRPP (glass-fiber reinforced polypropylene) wetted construction for chemical resistance
- High head impeller for improved pressure performance at low flow
- Fixed spindle design with no bearing, reducing wear components
- Compact, lightweight footprint for space-constrained installations
- Internal cooling circuit helps manage bearing/spindle temperature
- Quiet, close-coupled motor and pump assembly
Applications
- Laser system cooling loops
- Small chiller circulation systems
- Blood analyzer and medical diagnostic equipment
- Precision cleaning systems
- Bio-diesel generator processes
- Low-flow chemical transfer and recirculation
- General OEM equipment integration
Specifications
- Model: MD-6Z-220NL
- Series: MD6 (High Head)
- Motor Output: 1/250 HP
- Voltage: 220V AC, single phase
- Motor Speed: approximately 3,100 RPM
- Wetted Material: GFRPP polypropylene
- Port Size: 35/64 inch hose barb connections
- Design Type: Sealless, magnetically coupled, fixed spindle (no bearing)
- Max Liquid Viscosity: 30 mPa·s
- Operating Temperature Range: 0–80°C
- Priming: Not self-priming; must not be run dry
Frequently Asked Questions
Q: Can the Iwaki MD-6Z-220NL run dry without damage?
A: No. This pump is not self-priming, and running it without liquid can cause damage to the internal components, so it should always be primed before startup.
Q: What kind of liquids is this pump compatible with?
A: Thanks to its GFRPP polypropylene wetted parts, it handles a range of mild chemicals and process fluids well, but liquids containing iron, nickel, or other magnetic materials should be avoided since they can interfere with the magnetic coupling.
Q: Is the MD-6Z-220NL suitable for continuous operation?
A: Yes, it's designed for continuous duty in OEM and light industrial applications, with an internal cooling circuit that helps manage heat during sustained use.
Q: What does the "high head" designation mean for this pump?
A: The high head impeller is optimized to generate greater pressure at a lower flow rate, making it well suited for applications that need to push liquid against more resistance rather than move large volumes quickly.
Q: Does this pump require regular seal replacement?
A: No. Because it uses magnetic coupling instead of a mechanical shaft seal, there's no seal to wear out or replace, which lowers long-term maintenance needs.
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