March 1U-MD Magnetic Drive Pump 115V

March 1U-MD Magnetic Drive Pump 115V

The 1U-MD is March magnetic drive construction in polypropylene wet end with a ceramic magnet impeller. The impeller assembly is the only moving part in the wet end, riding on a stationary shaft between thrust washers, and the drive magnet on the motor shaft turns behind a solid molded housing wall. That layout is why these pumps are specified for chemicals that would destroy a sealed pump in weeks.

The 1U-MD needs a flooded suction and a liquid that keeps flowing through it. It will not lift and it will not tolerate dry running, and a trimmed impeller is the correct answer when the liquid has a higher specific gravity or viscosity than water, or when the temperature is elevated. Beyond that it is a low maintenance pump with three wear parts and no seal to service.

Key Features

• March 1U-MD sealless magnetic drive centrifugal pump
• Polypropylene wet end with a ceramic magnet impeller
• Supplied for 115V operation
• Screen inlet and 1/4 in MPT outlet for submersible duty
• Series rating is up to 2.3 to 3.0 GPM with 4.6 ft of head
• Maximum internal pressure 50 PSI, liquid temperature to 190 F in open air and 160 F submersible
• No shaft seal, no packing and no dynamic seal anywhere in the design

Applications

• Chemical transfer, dosing and recirculation
• Plating, etching, photo processing and rinse lines
• Water treatment, filtration and laboratory circulation
• Hydronic, cooling, chilling and heat exchanger loops
• Marine and OEM equipment where a leaking seal is unacceptable

Specifications

• Brand: March Pumps (March Manufacturing Inc)
• Model: March 1U-MD
• Type: Sealless magnetic drive centrifugal pump
• Construction: Polypropylene wet end with a ceramic magnet impeller
• Electrical: 115V
• Configuration: Screen inlet and 1/4 in MPT outlet for submersible duty
• Series Performance: up to 2.3 to 3.0 GPM with 4.6 ft of head
• Series Connections: 3/8 in OD, 1/2 in OD or 1/4 in MPT depending on model
• Maximum Internal Pressure: 50 PSI
• Maximum Liquid Temperature: 190 F in open air and 160 F submersible
• Condition: New, genuine March replacement part

Frequently Asked Questions

Q: Can it run on 50 Hz?
These motors are rated for 50 and 60 Hz where the nameplate says so, but flow, head and speed are all lower on 50 Hz.

Q: Will it prime itself?
No. March magnetic drive pumps need a flooded suction and produce no suction lift, so the pump has to sit below the liquid level unless a self priming chamber is fitted.

Q: What happens if it runs dry?
The impeller bushing and shaft lose their only lubricant and wear very quickly. A few seconds is survivable, a few minutes usually is not.

Q: Which way should the motor turn?
Clockwise when you are looking into the inlet of the pump.