Iwaki L-MD-55FZ Magnetic Drive Pump Liquid End
If your Iwaki MD-55FZ series pump has started losing pressure, running rough, or showing signs of wear around the wet end, the L-MD-55FZ liquid end is the exact replacement part built to bring it back to full working order. This is the front-facing section of the pump, the part that actually touches the fluid, and it's molded from carbon-fiber reinforced ETFE for excellent chemical resistance and long service life even in demanding transfer or process applications. Because it pairs with a magnetic drive design, there's no mechanical shaft seal to wear out or leak, which is a big part of why these pumps are trusted in labs, industrial process lines, and recirculation systems that can't afford downtime.
Swapping in a genuine liquid end rather than replacing the whole pump is usually the smarter move, both for your budget and for keeping the rest of the system's calibration and plumbing untouched. The silicon carbide bearing and thrust components inside are engineered to handle continuous duty with minimal friction, so once installed, this part should hold up under the same demanding conditions the original was built for. It's a straightforward fit for anyone already familiar with Iwaki's MD-F series pump family, and it keeps your existing motor and mounting hardware in service instead of starting from scratch.
Whether you're maintaining a chemical dosing system, a chiller loop, or a general fluid transfer setup, this liquid end restores the pump's sealless, low-noise operation without compromising on durability. It's a practical, cost-effective repair part for anyone who wants their Iwaki mag-drive pump running like new.
Key Features:
- Sealless magnetic drive design eliminates mechanical shaft seals, reducing leak risk
- Casing constructed from carbon-fiber reinforced ETFE (CFR-ETFE) for strong chemical resistance
- Silicon carbide bearing and thrust ring for smooth, low-friction, long-duty operation
- Direct-fit replacement part for Iwaki MD-55FZ and compatible MD-F series pumps
- Compact, quiet design suited for continuous industrial or laboratory use
Applications:
- Chemical dosing and metering systems
- Fluid transfer and recirculation loops
- Laboratory and process equipment requiring high-purity handling
- Chiller and temperature control systems
- General industrial and OEM pump maintenance
Specifications:
- Part Number: L-MD-55FZ
- Port Size: 1" NPT
- Casing Material: CFR-ETFE (carbon-fiber reinforced ETFE)
- Bearing Material: Silicon carbide
- Thrust Ring/Spindle Material: Silicon carbide
- Drive Type: Magnetic (sealless)
- Compatible Series: Iwaki MD-F Series Mag-Drive Pumps
- Liquid Temperature Range: 32°F–176°F (0°C–80°C)
Frequently Asked Questions
Q: Is the L-MD-55FZ liquid end compatible with all Iwaki MD series pumps?
A: It's designed as a direct-fit replacement for the Iwaki MD-55FZ and other MD-F series pumps that share the same housing and mounting configuration. Always confirm your existing model number before ordering to ensure a proper match.
Q: Can this liquid end be used with corrosive or aggressive chemicals?
A: Yes, the CFR-ETFE casing offers strong chemical resistance, making it suitable for many corrosive fluid transfer and dosing applications. For highly aggressive or unusual chemistries, it's still worth checking compatibility against your specific fluid.
Q: Does replacing the liquid end require replacing the motor too?
A: No, the liquid end is a separate wet-end assembly that installs onto your existing Iwaki mag-drive motor housing, so there's no need to replace the motor.
Q: What causes a liquid end to need replacement?
A: Wear typically shows up as reduced flow, increased noise, vibration, or visible erosion inside the casing after extended use or exposure to abrasive or aggressive fluids.
Q: Is any special tooling needed to install the L-MD-55FZ liquid end?
A: Installation generally only requires basic hand tools, and the process mirrors standard Iwaki MD-F series maintenance procedures outlined in the pump's service manual.
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