Iwaki L-MD-55RT Liquid End Mag-Drive Pump Head
When the pump head on your Iwaki MD-55RT or MD-55RLT wears out, you don't need to replace the whole pump and motor assembly. The Iwaki L-MD-55RT liquid end is the wet-end replacement piece, built from GFRPP polypropylene so it stands up to a wide range of chemicals, saltwater, and everyday industrial fluids without corroding or breaking down. Because it uses a magnetic coupling instead of a mechanical shaft seal, there's nothing to leak or wear out over time the way a traditional seal would, which means fewer maintenance headaches and a longer service life for anyone running the pump continuously.
This liquid end bolts directly onto the existing motor of a compatible MD-55RT or MD-55RLT unit, so swapping it out is a straightforward repair rather than a full pump replacement. It's sized with 1 inch NPT threaded ports, matching the original connections, and it's engineered to work with the same impeller and spindle assembly used across the MD-55R platform. Whether the pump is running in a lab, a chemical feed system, an aquarium loop, or a small industrial process line, this part restores the original flow and pressure performance without the cost of buying new.
For anyone maintaining an Iwaki MD-series pump, keeping a spare L-MD-55RT liquid end on hand is a smart way to minimize downtime. It's a direct-fit part, not a generic substitute, so alignment, port sizing, and magnetic coupling all match what the pump was originally designed around.
Key Features
- Seal-less magnetic-drive design eliminates shaft seal leak points
- Constructed from GFRPP (glass-filled polypropylene) for strong chemical resistance
- Direct-fit replacement liquid end for MD-55RT and MD-55RLT pump assemblies
- Compatible with original impeller, spindle, and O-ring components
- Compact design suited for tight installation spaces
- Quiet, low-vibration operation typical of Iwaki mag-drive pumps
Applications
- Chemical process and chemical feed systems
- Industrial fluid transfer and circulation
- Aquarium and aquatic system water circulation (freshwater and saltwater)
- OEM equipment requiring compact centrifugal pump heads
- Laboratory and light industrial liquid handling
- Semiconductor and process equipment fluid loops
Specifications
- Port Size: 1 inch NPT threaded inlet/outlet
- Pump Body Material: GFRPP polypropylene
- Impeller Material: GFRPP polypropylene
- Drive Type: Magnetic coupling (sealless)
- Compatible Models: MD-55RT, MD-55RLT
- Rated Motor Output (host pump): 1/8 HP
Frequently Asked Questions
Q: Does the Iwaki L-MD-55RT come with a motor?
No, this is a liquid end only, meaning it includes the wet-end pump housing and impeller assembly designed to attach to an existing MD-55RT or MD-55RLT motor.
Q: Is the L-MD-55RT compatible with both freshwater and saltwater applications?
Yes, the GFRPP polypropylene construction resists corrosion from both freshwater and saltwater, along with many industrial chemicals.
Q: What tools are needed to install the liquid end?
Installation typically only requires basic hand tools since the liquid end mounts to the motor housing using standard fasteners, without any specialized equipment.
Q: Can this part be used on other Iwaki MD-series pump sizes?
No, the L-MD-55RT is sized specifically for the MD-55RT and MD-55RLT pump platform and is not interchangeable with other MD series sizes.
Q: Why choose a magnetic drive pump head instead of a sealed pump?
A magnetic drive design removes the mechanical shaft seal entirely, which reduces the risk of leaks and lowers long-term maintenance needs, especially in continuous-duty applications.
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