Description
The AMT 81-1/2D3-X1-3P gorman-rupp self-priming pump 1-1/2" cast iron. Delivers up to 128 GPM. This line of Gorman-Rupp self-priming centrifugal pumps are coupled to an hazardous duty explosion proof motor. These pumps are designed for use in hazardous environments and/or for handling flammable liquids. 1-1/2″ and 2″ NPT port sizes available w
End-Suction Close-Coupled Design
Close-coupled design eliminates the flexible coupling and separate bearing housing of frame-mounted pumps — fewer components, smaller footprint, and lower maintenance requirements. NEMA-frame motor for direct interchangeability with standard replacements.
Dual Volute Casing — Extended Bearing and Seal Life
Dual volute design balances radial hydraulic forces on the impeller. Single-volute pumps develop a net radial force that increases bearing wear especially at off-BEP points. The dual volute significantly extends bearing and mechanical seal service life.
Multiple Construction Options
Available in cast iron, bronze, stainless steel, and thermoplastic construction — select the casing and seal materials matched to your specific fluid, temperature, and chemical compatibility requirements.
NEMA 56J Frame — Standard Motor Interchangeability
NEMA 56J motor frame is fully interchangeable with motors from any major manufacturer. Motor replacement in the field requires no special tooling, no custom parts, and no factory service — any electrician can replace the motor with a standard stocking item.
QSP Quick Ship Program
Standard configurations ship within 24 hours from AMT's Quick Ship Program. For applications where pump downtime has direct operational impact, QSP availability eliminates extended lead time on the most common configurations.
Continuous Duty Rating
TEFC motors are rated for continuous duty operation — not a duty-cycle rated motor. Designed for 24/7 operation in industrial environments without derating or forced cooling intervals.
| Model Number | 81-1/2D3-X1-3P |
| Series | Self Priming Pump Explosion Proof Hazardous Duty Motors |
| Category | Specialty Pumps |
| Max Flow Rate | 128 GPM |
| Max Head | 72 Ft. |
| Max Temperature | 160° F |
| Max Solids Handling | 3/8 |
| Max Flow Rate | 128 GPM |
| Max Head | 72 Ft. |
| Max Fluid Temperature | 160° F |
| Max Solids Handling | 3/8 |
| Fluid compatibility | For use with non-flammable, non-abrasive liquids compatible with pump component materials. Verify chemical compatibility before use. |
| Seal compatibility | Always verify seal material compatibility with your specific fluid and chemical conditions. |
| Electrical | Requires a properly sized, grounded branch circuit. Do not use an extension cord. Protect motor with a properly sized thermal overload relay. |
| Temperature limit | Maximum fluid temperature 160° F. Exceeding this limit will damage seals and motor insulation. |