Description
GolPumps 4 HP Submersible Well Pump – High-Performance Solution for Deep Wells (ST 1328)
The GolPumps 4 HP Submersible Well Pump (ST 1328) is designed to meet the stringent demands of deep well applications, offering superior performance in 4″ or larger wells. With an encapsulated-resin filled motor, this pump ensures optimal efficiency and durability. Each unit is 100% tested for quality assurance before shipment.
Key Features & Benefits
- Hermetically Sealed Stator – Anti-track stator resin prevents motor burnout, increasing the lifespan of the pump
- High Efficiency – Maximizes operating cost savings while maintaining high-performance levels
- Copper Wiring – Provides superior conductivity and extended pump life
- Pressure Equalizing Diaphragm – Ensures stable performance under varying pressure conditions
- Removable Lead Connector – Simplifies installation and maintenance
- Thrust Pad – Reduces vibrations and improves pump stability during operation
- Control Boxes Available – For single-phase motor with standard NEMA mounting dimensions
Technical Specifications
- Upper Bracket: Cataphoresis-treated cast iron with SS304 stainless steel cover cap
- Max Immersion Depth: 985 ft
- Protection Rating: IP68 (dustproof and waterproof)
- Max Starts Per Hour: 20 (at regular intervals)
- Sealing System: Sand slinger and lip seal for enhanced protection
- Insulation Class: F
- Rated Ambient Temperature: 86°F with minimum cooling flow of 0.08 m/s
- Standard Installation Position: Vertical or Horizontal
Pump Specifications
- Max Head: 1100 ft
- Max Flow Rate: 21 GPM
- Discharge Size: 1 1/4″
- Horsepower: 4 HP
- Pump Material: Noryl (durable, corrosion-resistant material)
- Pump Model: ST 1328
Includes wire splice kit for easy installation.
Ideal For:
- Deep well water supply for residential, agricultural, and commercial use
- Irrigation, livestock watering, and general water pumping applications
- Energy-efficient, reliable pumping with minimal maintenance needs
Order today for efficient, long-lasting performance with GolPumps’ submersible well pump!
| Model | Pump | ST 13-28 |
| Motor | 4CF6966 | |
| Brand | Gol Pumps | |
| Manufacturer’s Warranty | 1 year Limited Warranty | |
| P2 | kW | 3 |
| HP | 4 | |
| Service Factor | 1.15 | |
| Material | Pump | Noryl |
| Motor | Noryl | |
| Voltage – Phase | 230V – Three Phase | |
| Wire | – | |
| In | A | 13.4 |
| Imax | A | 14.6 |
| Istart | A | 103.9 |
| PF (%) | Allowable Load | 0.73 |
| Overload Factor | 0.77 | |
| Efficiency (%) | Allowable Load | 77.2 |
| Overload Factor | 77 | |
| R.P.M | 3450 | |
| Thrust | N | 6000 |
| Capacitor | UF | No |
| Cable | AWG | 14 |
| Length (ft.) | 8.2 | |
| Production Country | Taiwan | |
Performance Curves
| Pump Model | Motor | Q Capacity 3500RPM | |||||||||
| kW | HP | Gal/Min | 0 | 7.9 | 9.2 | 10.6 | 13.2 | 15.9 | 18.5 | 21.1 | |
| ST 13-28 | 3 | 4 | Head (ft.) | 882.5 | 833.3 | 807.1 | 774.3 | 692.3 | 590.6 | 465.9 | 315 |
Dimensions and Weights
| Outlet | Motor Dia. | Dimensions (inch) | Weight (lb) | |||||
| A | B | C | D | Pump | Motor | Pump + Motor | ||
| NPT 1 1/4″ | 4″ | 26.7″ | 1 1/4″ | 3.9″ | 48.4″ | 13.2 | 47.4 | 60.6 |
Part List and Materials
| No. | Part Name | Materials |
| 1 | Discharge Head | AISI 304 |
| 4 | Check Valve Cone | AISI 304 |
| 6 | Check Valve Retaining Ring | AISI 304 |
| 8 | Bearing Spider | Glass Filled Polycarbonate |
| 12 | Diffuser | Glass Filled Polycarbonate |
| 13 | Bowl | AISI 304 |
| 18 | Impeller | Noryl |
| 34 | Strainer | AISI 304 |
| 40 | Pump Shaft / Coupling | AISI 304 |
| 42 | Shaft Sleeve | AISI 304 or Norly |
| 48 | Pump Casing | AISI 304 |
| 52 | Cable Guard | AISI 304 |
| 86 | O-Ring | NBR |
| 92 | Bearing | Polyacetal |
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