AMT 3890-012-98 Stainless Steel Impeller Subgroup, 1.90 HP
The AMT 3890-012-98 is the genuine stainless steel impeller subgroup for AMT’s 1.90 HP three-phase build. Being supplied as a subgroup rather than a bare impeller is the useful distinction here — AMT groups the impeller with the small components that belong with it, so you are not assembling the new part from a mix of new and used pieces.
That matters because the things that fail around an impeller tend to fail with it. Hardware that has been torqued and untorqued several times loses its clamping reliability, and the small seals and washers in the impeller area take a permanent set. Fit a new impeller on tired hardware and the classic result is an impeller that works loose in service — fretting the shaft end, chewing the drive key, running out of balance and destroying the mechanical seal behind it.
Stainless steel gives the impeller corrosion resistance in salt water, washdown chemistry and aggressive process liquid, and it holds a sharper vane edge in abrasive flow than bronze or iron. At 1.90 HP this is one of the larger impellers in the range, where balance matters especially: an impeller that has lost material unevenly to erosion puts that imbalance straight through the seal and bearings every revolution. Match the horsepower and phase on your nameplate to the parts breakdown before ordering.
Key Features
- Genuine AMT (Gorman-Rupp) impeller subgroup — the impeller with the parts that belong with it
- Stainless steel for corrosion resistance and lasting vane edge sharpness
- Matched to the 1.90 HP three-phase build
- Factory-balanced, so it will not vibrate the mechanical seal and bearings
- Avoids refitting a new impeller onto tired hardware
Applications
- AMT pumps built on the 1.90 HP three-phase specification
- Replacing an eroded or unbalanced impeller causing repeat seal failures
- Restoring lost head, flow and efficiency
- Salt water, washdown and aggressive process liquid service
- Marine, dockside, dewatering and general water transfer equipment
Specifications
- Brand: AMT (Gorman-Rupp)
- Manufacturer Part Number: 3890-012-98
- Part Type: Impeller subgroup
- Material: Stainless steel
- Rated For: 1.90 HP, three-phase
- Quantity Used Per Pump: 1
- Condition: New
Not sure this is the right part? Send us a Picture of the pump plate on your pump and the CLR Marine team will confirm the correct impeller subgroup before you order.
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