AMT 4230-97 Bronze Coolant Recirculating Pump – 1/25 HP, 115V
If you're looking for a small, dependable pump that can handle liquids other than clean water, the AMT 4230-97 is built with exactly that job in mind. Its cast bronze casing, column, and base resist corrosion, while the bronze self-cleaning, semi-open impeller keeps performance steady even with erosive or slightly abrasive fluids. Because there's no bottom bearing to wear out or clog, this pump tends to hold up well in environments where lesser pumps would fail early — think coolant tanks, chemical etching baths, and other settings where the liquid isn't always forgiving.
Power comes from a compact 1/25 HP, 115V, single-phase TEFC (totally enclosed, fan-cooled) motor rated at 1.5 amps and 1590 RPM, paired with a 36-inch three-conductor cord for easy setup. The 3/8" NPT female discharge port makes plumbing straightforward, and the pump is rated to move liquids up to 900 SSU in viscosity and temperatures between roughly 40°F and 200°F. It's not designed to be submerged — the motor should sit at least two inches above the liquid surface — which keeps the electrical components protected while the wetted parts do the work.
This is the kind of pump that shows up in laboratories, evaporative coolers, small fountains, bilge systems, and general industrial or commercial recirculating setups where a compact, corrosion-resistant unit is more practical than a larger centrifugal pump. It's not exclusively a marine product — it's just as at home on a workbench or in a machine shop coolant tank as it is on a boat.
Key Features
- Cast bronze casing, column, and base for corrosion resistance
- Bronze, self-cleaning, semi-open impeller resists clogging
- No bottom bearing, ideal for erosive or particulate-laden liquids
- Brass column and impeller shaft
- Fiber gasket shaft seal
- 1/25 HP, 115V, single-phase TEFC motor with automatic thermal protection
- 36-inch three-conductor power cord included
Applications
- Industrial and commercial coolant recirculation
- Chemical etching processes
- Evaporative coolers
- Laboratory fluid circulation
- Decorative fountains
- Bilge pumping
- General non-flammable liquid recirculation
Specifications
- Model/Part Number: 4230-97
- Motor: 1/25 HP, 115V, 1 Phase, TEFC
- Amperage: 1.5 amps
- Speed: 1590 RPM
- Discharge Port Size: 3/8" NPT female
- Maximum Flow Rate: up to 8 GPM
- Maximum Head: approximately 10 ft
- Liquid Viscosity Range: up to 900 SSU
- Operating Temperature Range: 40°F to 200°F (4°C to 93°C)
- Construction: Bronze impeller, casing, column, and base; fiber gasket seal
- Bearing Configuration: No bottom bearing
- Cord Length: 36 inches, three-conductor
FAQ
Q: Can the AMT 4230-97 be submerged in liquid?
A: No. The motor is not designed to be submersible. It should be positioned at least two inches above the liquid level, with the liquid depth kept to a maximum of about six inches.
Q: What kinds of liquids can this pump handle?
A: It's built for non-flammable liquids compatible with its bronze and brass components, including coolants and mildly erosive fluids with viscosities up to 900 SSU.
Q: Does the AMT 4230-97 require three-phase power?
A: No. It runs on standard 115V single-phase power, making it easy to install in most shop, lab, or commercial settings without special wiring.
Q: What is the benefit of a pump with no bottom bearing?
A: Without a bottom bearing, there's less to wear out or seize when handling gritty or erosive liquids, which extends service life in demanding recirculating applications.
Q: Is this pump only used for marine purposes?
A: No. While it can be used for bilge pumping, the AMT 4230-97 is equally common in industrial coolant systems, laboratories, evaporative coolers, and fountains.
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