Iwaki WMD-40RLT-115 Magnetic Drive Pump
Anyone who has dealt with a leaking seal on a traditional centrifugal pump knows how much downtime and mess it can cause. The Iwaki WMD-40RLT-115 solves that problem with a fully sealless, magnetically coupled design that eliminates shaft seals entirely, so there's nothing to wear out and nothing to leak. Built from glass fiber reinforced polypropylene with PTFE bearings and an alumina ceramic spindle and thrust ring, this small but capable pump is engineered to handle demanding fluid transfer tasks quietly and efficiently, whether that's in a chemical process line, a laboratory instrument, or a piece of specialized equipment that simply can't tolerate downtime.
Powered by a 1/12 HP, 115 volt motor running at roughly 3200 to 3400 RPM, the WMD-40RLT-115 delivers dependable performance in a compact footprint with 3/4 inch NPT connections. It runs cooler and quieter than many conventional mag drive pumps thanks to an internal cooling circuit that continuously lubricates bearing surfaces and purges heat and gas from the pump chamber, extending service life even under continuous duty.
This pump is a favorite for OEM integrators and equipment builders because of how easily it fits into tight spaces without compromising reliability. From laser cooling loops and chiller recirculation systems to blood analyzers and general chemical transfer applications, the WMD-40RLT-115 offers a rare combination of durability, low maintenance, and quiet operation that keeps critical systems running smoothly.
Key Features
- Sealless magnetic drive design, no shaft seal to leak or replace
- Glass fiber reinforced polypropylene (GFRPP) casing and impeller
- PTFE bearing with alumina ceramic thrust ring and spindle
- Internal cooling circuit for reduced bearing temperature and gas purging
- Totally enclosed fan cooled (TEFC) domestic motor
- Quiet, compact, and energy efficient operation
- Rotating spindle design for standard flow performance
Applications
- Corrosive and chemical fluid transfer
- Laboratory and analytical instrumentation
- Laser and chiller cooling systems
- Blood analyzer and medical equipment
- General process recirculation and OEM machine integration
- Aquarium and aquatic system circulation
Specifications
- Model: WMD-40RLT-115
- Motor: 1/12 HP, 115V, 1 Phase, 50/60 Hz
- Speed: Approximately 3200–3400 RPM
- Port Size: 3/4" NPT
- Construction: GFRPP polypropylene
- Bearing: PTFE with alumina ceramic spindle and thrust ring
- Motor Type: TEFC (Totally Enclosed Fan Cooled)
- Priming: Not self-priming, requires flooded suction
Frequently Asked Questions
Q: Is the Iwaki WMD-40RLT-115 self-priming?
No, this pump is not self-priming. It requires a flooded suction line, meaning liquid must already be present at the inlet before startup to avoid running the pump dry, which can cause damage.
Q: What types of liquids should not be pumped with this model?
Because the pump relies on magnetic coupling to transmit power, liquids containing iron, nickel, or other magnetic particulates should be avoided, as they can interfere with the magnetic drive mechanism.
Q: Can this pump be used with corrosive chemicals?
Yes, the GFRPP construction along with PTFE and ceramic internal components makes it well suited for many corrosive or aggressive fluid applications, though compatibility should always be checked against the specific chemical involved.
Q: How is the WMD-40RLT-115 different from the standard MD series?
The WMD designation indicates the pump is paired with an American-made motor, while the standard MD series typically uses a Japanese-made motor. Performance characteristics are otherwise similar within the same pump size.
Q: What makes this pump quieter than traditional mag drive pumps?
The internal cooling circuit design reduces friction and heat buildup around the bearings, which contributes to smoother, quieter operation compared to many conventional magnetic drive pumps.
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