Monarch ACE-300SD ACE-500SD End Suction Centrifugal Pump JM Frame & Repair Parts
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Monarch ACE-300SD & ACE-500SD End Suction Centrifugal Pumps
The Monarch ACE-300SD and ACE-500SD are industrial-grade, single-phase end suction centrifugal pumps designed for heavy-duty water transfer. Built on industry-standard JM frames, these pumps are engineered for reliability in irrigation, commercial pressure boosting, and general fluid transfer applications. Whether you require the 3 HP ACE-300SD or the high-capacity 5 HP ACE-500SD, Monarch delivers robust performance with a rugged cast iron design.
Key Features and Construction
The ACE Series is distinguished by its high-quality materials and thoughtful engineering, designed to minimize maintenance and maximize lifespan:
- Cast Iron Durability: Both the casing and the enclosed impeller are cast from thick-wall gray iron. This heavy-duty construction absorbs vibration and withstands harsh operating environments better than stamped steel or plastic.
- JM Frame Motor: These models utilize standard JM motors (Square Flange) running at 3600 RPM. The single-phase design (230V) makes them accessible for locations where three-phase power is not available.
- Superior Sealing: Equipped with a mechanical seal rated for high temperatures up to 200°F, ensuring leak-free performance even under thermal stress.
- Moisture Protection: A shaft flinger is combined with a large drain hole in the adapter bracket to actively prevent moisture from reaching and damaging the motor bearings.
- Maintenance Friendly: The casing includes dedicated ports for air bleeding during priming and drainage ports to prevent frost damage in cold climates.
Applications
The Monarch ACE-300SD and ACE-500SD are versatile pumps suitable for a wide range of tasks:
- Lawn and garden sprinkler systems.
- Agricultural irrigation.
- Sump and sewage (effluent) transfer.
- Commercial water circulation.
- Water supply pressure boosting.
Technical Specifications
Performance Chart (Total Head in Feet)
| HP | Capacities in U.S. GPM | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 20 | 30 | 40 | 50 | 60 | 70 | 80 | 100 | 120 | 140 | 160 | |
| 3 | 145 | 140 | 132 | 124 | 116 | 110 | 104 | 82 | 62 | – | – |
| 5 | 172 | 172 | 170 | 165 | 162 | 160 | 156 | 135 | 110 | 82 | 15 |
Dimensions (Measured in inches)
| Model | Suct. NPT | Disch. NPT | CP | D | E | F | L | M | N | OP | X | Y |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ACE-300 | 2″ | 2″ | 17.25 | 4.99 | 5.75 | – | 8.79 | 4.12 | 5.69 | 10.37 | 6.31 | 3.25 |
| ACE-500 | 2″ | 2″ | 19.00 | 4.05 | 7.50 | 5.50 | 8.79 | 4.12 | 5.69 | 10.37 | 6.31 | 3.25 |
ACE Series Models & Electrical Data
| ACE SERIES – ELECTRIC MOTOR DRIVEN | ||||||
|---|---|---|---|---|---|---|
| Model No. | Order No. | HP | Suct. NPT | Disch. NPT | Electrical Characteristics | Ship Wt. (lbs.) |
| ACE-300SD | 614571 | 3 | 2″ | 2″ | 1/60/230V | 83 |
| ACE-300-3SD | 614567 | 3 | 2″ | 2″ | 3/60/208-230/460V | 83 |
| ACE-500SD | 614569 | 5 | 2″ | 2″ | 1/60/230V | 134 |
| ACE-500-3SD | 614570 | 5 | 2″ | 2″ | 3/60/208-230/460V | 129 |
Repair Parts
Maintain peak efficiency with genuine replacement parts.
Model Reference Key:
A: ACE-300SD (Single Phase)
B: ACE-300B-5SD
C: ACE-300B-3SD
D: ACE-500SD (Single Phase)
E: ACE-500-3SD
| Ref. # | Code # | A | B | C | D | E | Description |
|---|---|---|---|---|---|---|---|
| 2 | 218705 | 1 | Motor, 5HP Single Ph., 230V (Note: Model A is 3HP in spec sheet; verify nameplate). | ||||
| 2 | 218707 | 1 | Motor, 5HP 3 Ph., 208-230/460V | ||||
| 2 | 218700 | 1 | Motor, 3HP Single Ph., 115/230V | ||||
| 2 | 218702 | 1 | Motor, 3HP 3 Ph., 208-230/460V | ||||
| 2 | 218704 | 1 | Motor, 3HP 3 Ph., 575V | ||||
| 4 | 437841 | 1 | 1 | 1 | 1 | 1 | Adapter |
| 5** | 437839 | 1 | 1 | 1 | 1 | 1 | Casing |
| 6 | 433158 | 1 | 1 | Impeller | |||
| 6 | 433129 | 1 | 1 | Impeller | |||
| 7* | 240070 | 1 | 1 | 1 | 1 | 1 | Seal MS-7 |
| 8* | 240071 | 1 | 1 | 1 | 1 | 1 | Spring Holder |
| 9* | 198995 | 1 | 1 | 1 | 1 | 1 | ‘O’ Ring |
| 10* | 266008 | 1 | 1 | 1 | 1 | 1 | Sleeve |
| 11* | 432020 | 1 | 1 | Key | |||
| 11* | 432015 | 1 | 1 | Key | |||
| 12* | 190848 | 1 | 1 | Flinger | |||
| 13 | 185620 | 3 | 3 | 3 | 3 | 3 | 1/4″ NPT Pipe Plug Zinc Plated |
| 14 | 185910 | 1 | 1 | 1 | 1 | 1 | 1/8″ NPT Pipe Plug |
| 20 | 172971 | 4 | 4 | 4 | 4 | 4 | Stud 3/8″ x 1-1/4″ SST |
| 21 | 226210 | 4 | 4 | 4 | 4 | 4 | Bolt 3/8″ x 1″ ZNPL |
| 22 | 227830 | 4 | 4 | 4 | 4 | 4 | Nut Hex 3/8″ ZNPL |
| 23 | 176230 | 8 | 8 | 8 | 8 | 8 | Spring Washer 3/8″ ZNPL |
| 26 | 416720 | 1 | 1 | Collar | |||
| 26 | 416721 | 1 | 1 | Collar | |||
| 27 | 124191 | 1 | 1 | 1 | 1 | 1 | Bolt 3/8″ UNC x 3/4″ SST |
FAQs
What is the voltage for the ACE-300SD and ACE-500SD?
Both the ACE-300SD and ACE-500SD are single-phase pumps. The ACE-300SD is listed for 1/60/230V, and the ACE-500SD is listed for 1/60/230V operation.
Are these pumps self-priming?
No, these are standard end suction centrifugal pumps. They generally require a flooded suction or must be primed before use. The casing features ports to assist with air bleeding during priming.
What are the suction and discharge port sizes?
Both the ACE-300SD and ACE-500SD models feature 2-inch NPT connections for both suction and discharge.
Can I replace the motor easily?
Yes, these pumps use industry-standard JM motor frames, which makes finding compatible replacement motors and aligning the shaft straightforward.