March AC-5B-MD Magnetic Drive Pump 115V

March AC-5B-MD Magnetic Drive Pump 115V

The AC-5B-MD is March magnetic drive construction in stainless steel wet end with an air cooled motor. 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 AC-5B-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 AC-5B-MD sealless magnetic drive centrifugal pump
• Stainless steel wet end with an air cooled motor
• Supplied for 115V operation
• Beer build for hot wort and hot water, 17 GPM
• Series rating is up to 14.5 to 18 GPM with 27 to 29 ft of head
• Maximum internal pressure 50 PSI on polypropylene builds, 75 PSI on Kynar and 200 PSI on stainless, liquid temperature to 190 F on polypropylene, 200 F on Kynar and 250 F on stainless
• 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 AC-5B-MD
• Type: Sealless magnetic drive centrifugal pump
• Construction: Stainless steel wet end with an air cooled motor
• Electrical: 115V
• Configuration: Beer build for hot wort and hot water, 17 GPM
• Series Performance: up to 14.5 to 18 GPM with 27 to 29 ft of head
• Series Connections: 1 in FPT inlet with 1/2 in MPT outlet
• Maximum Internal Pressure: 50 PSI on polypropylene builds, 75 PSI on Kynar and 200 PSI on stainless
• Maximum Liquid Temperature: 190 F on polypropylene, 200 F on Kynar and 250 F on stainless
• 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.