Iwaki MD-70RL-115 Magnetic Drive Pump
The Iwaki MD-70RL-115 is a compact, sealless magnetic drive pump built for anyone who needs dependable fluid transfer without the headaches of a mechanical shaft seal. Because the impeller is driven magnetically rather than by a direct shaft connection, there's nothing to leak and nothing to wear out at the seal interface. That makes this pump a smart choice for labs, plating lines, water treatment setups, chillers, and any process where a stray drip simply isn't an option. The GFRPP construction stands up to a wide range of corrosive and aggressive fluids, so it earns its keep in demanding industrial and laboratory environments alike.
Running on a 1/4 HP, 115-volt single-phase motor, this pump is sized for smaller-scale transfer jobs where consistent, quiet performance matters more than raw horsepower. Its 1-inch hose barbed ports make plumbing straightforward, while the rotating ceramic spindle and PTFE bearing keep things running smoothly even under continuous duty. The TEFC motor design also means it's protected from dust and light moisture exposure, which is a nice bit of peace of mind if it's tucked into a tight equipment cabinet or process skid.
What really sets the MD-70RL-115 apart is its balance of simplicity and durability. There are no packing glands to adjust, no seals to replace, and the whole unit is engineered to be low-maintenance from day one. Whether it's circulating coolant, moving process chemicals, or handling general transfer duties, this pump delivers steady, reliable service without asking much in return.
Key Features
- Sealless magnetic drive design eliminates leak-prone mechanical shaft seals
- GFRPP (glass-fiber reinforced polypropylene) casing for strong chemical resistance
- Rotating ceramic spindle with PTFE bearing for smooth, low-friction operation
- TEFC (totally enclosed fan cooled) motor for added protection in industrial settings
- Built-in thermal protector automatically halts operation if the motor overheats
- Compact, lightweight footprint suited for tight installation spaces
Applications
- Chemical and corrosive fluid transfer
- Laboratory and process fluid circulation
- Water treatment and filtration systems
- Chiller and cooling loop circulation
- Plating, etching, and general industrial process lines
- OEM equipment requiring a compact, leak-free pump
Specifications
- Model/Part Number: MD-70RL-115
- Pump Type: Magnetic drive, sealless centrifugal pump
- Port Size: 1" hose barb (inlet and outlet)
- Motor: 1/4 HP, 115V, single phase, 50/60 Hz, TEFC
- Motor Speed: 3400 RPM
- Amperage: 2.8 A
- Max Flow Rate: 25.6 GPM
- Max Head: 31.8 ft
- Max System Pressure: 21.3 PSI
- Specific Gravity Limit: 1.0
- Casing Material: GFRPP
- Spindle Material: Ceramic
- Bearing Material: PTFE
- Permissible Liquid Temperature: 32°F to 176°F (0°C to 80°C)
Frequently Asked Questions
Q: Can the Iwaki MD-70RL-115 run dry without damage?
Running this pump dry, even briefly, can cause serious internal damage since the bearing and spindle rely on the pumped fluid for lubrication. It should always be primed with liquid before startup.
Q: What kinds of fluids is this pump safe to use with?
It's well suited to water and mildly to moderately corrosive chemicals compatible with GFRPP and ceramic components, with a specific gravity limit of 1.0. Always check chemical compatibility charts for specific fluids before use.
Q: Does this pump require routine maintenance?
Its sealless design significantly reduces maintenance needs since there's no packing or mechanical seal to service. Periodic inspection of the bearing and spindle for wear is still recommended for long-term reliability.
Q: Can the MD-70RL-115 be mounted in any orientation?
Iwaki generally recommends horizontal mounting with the motor shaft level to ensure proper bearing lubrication and consistent performance, though specific orientation guidance should follow the installation manual.
Q: What's the difference between the MD-70RL-115 and the MD-70RLZ-115?
The "RL" designation is the standard flow version, while the "RLZ" is the high-head variant with a different impeller design for applications needing greater pressure at lower flow rates.
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