Iwaki L-MD-20RT Magnetic Drive Liquid End: Durable Replacement Wet End for MD-20RT Pumps
The Iwaki L-MD-20RT is a complete liquid end assembly built to restore performance to an existing Iwaki MD-20RT magnetic drive pump without the cost of replacing the entire unit. Because the pump housing, impeller, bearings, and o-rings all wear together over time, Iwaki packages these components into one wet end set so a technician can swap the entire fluid path in a single service visit rather than sourcing individual parts.
This liquid end is molded from glass-fiber reinforced polypropylene (GFRPP), a material chosen for its resistance to a wide range of acids, bases, and industrial fluids. Paired with FKM seals, an alumina ceramic thrust ring, and a PTFE bearing, the L-MD-20RT is built to handle demanding transfer, recirculation, and process applications where standard elastomers and metal wet ends would fail. It's equally at home supporting laboratory equipment, laser cooling loops, and light industrial process lines as it is in water-based recirculation systems.
Because the L-MD-20RT is sealless by design, there's no mechanical shaft seal to leak or wear out. The magnetic coupling between the motor's drive magnet and the impeller's driven magnet keeps the fluid completely isolated from the motor, reducing maintenance needs and extending the working life of the pump once the new liquid end is installed.
Key Features
- Sealless magnetic drive design eliminates shaft seal leaks
- GFRPP (glass-fiber reinforced polypropylene) casing for broad chemical compatibility
- FKM seal material for reliable sealing performance
- Alumina ceramic thrust ring and spindle for extended bearing life
- PTFE bearing reduces friction and heat buildup
- Dynamically balanced impeller and magnet assembly for smooth, quiet operation
- Drop-in replacement designed specifically for the Iwaki MD-20RT pump platform
Applications
- Chemical transfer and recirculation systems
- Laboratory and analytical instrument fluid loops
- Laser and chiller cooling circuits
- Light industrial process fluid handling
- Aquarium and aquaculture water circulation
- Filtration and water treatment systems
Specifications
- Compatible pump model: Iwaki MD-20RT
- Casing material: GFRPP
- Seal material: FKM
- Bearing material: PTFE
- Thrust ring/spindle material: Alumina ceramic
- Port size: 3/4" NPT
- Assembly type: Complete wet end (liquid end only, motor not included)
Frequently Asked Questions
Q: Does the L-MD-20RT include the motor?
A: No, this is a liquid end (wet end) assembly only. It replaces the fluid-handling components on an existing MD-20RT pump; the motor remains in place.
Q: What seal material does the L-MD-20RT use?
A: It uses FKM seals, which offer strong resistance to a wide range of chemicals and elevated temperatures.
Q: Can the L-MD-20RT be used with liquids other than water?
A: Yes. Its GFRPP construction supports many industrial and chemical fluids, though compatibility should be confirmed against the specific fluid being handled.
Q: How do I know if I need a full pump or just the liquid end?
A: If the motor is still running properly and only the wet end shows wear, leakage, or reduced flow, replacing just the liquid end is typically sufficient.
Q: Is installation of the L-MD-20RT straightforward?
A: Yes, it is designed as a bolt-on wet end set that fits directly onto the existing MD-20RT motor and mounting configuration without modification.
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