Description
GolPumps 4” Encapsulated-Resin Filled Motor – High-Performance Submersible Well Pump (0.5 HP, ST 0512)
GolPumps’ encapsulated-resin filled motor is designed for efficient and long-lasting water pumping, making it perfect for 4-inch or larger wells. Engineered to meet industry standards, this high-performance submersible well pump is 100% tested before shipment, ensuring reliability and durability in deep well applications.
Key Features & Benefits
Hermetically Sealed Stator – Anti-tracking, stator resin-filled design prevents motor burnout
High-Efficiency Motor – Reduces energy consumption and lowers operational costs
Premium Copper Wiring – Ensures optimal conductivity and durability
Pressure Equalizing Diaphragm – Enhances motor longevity and performance stability
Removable Lead Connector – Simplifies installation and maintenance
Thrust Pad – Provides stability and reliability
Compatible Control Boxes – Available for single-phase motors
Standard NEMA Mounting Dimensions – Ensures secure and hassle-free installation
Technical Specifications
🔹 Upper Bracket: Cataphoresis-treated cast iron with SS304 stainless steel cover cap
🔹 Max Immersion Depth: 985 ft
🔹 Protection Rating: IP68 (Fully waterproof and submersible)
🔹 Max Starts per Hour: 20 (at regular intervals)
🔹 Sealing System: Sand slinger and lip seal for enhanced protection against contaminants
🔹 Insulation Class: F
🔹 Rated Ambient Temperature: 86°F with a minimum cooling flow of 0.08 m/s
🔹 Installation Position: Vertical or Horizontal
Pump Specifications
Max Head: 380 ft
Max Flow Rate: 7.5 GPM
Discharge Size: 1 1/4″
Horsepower: 0.5 HP
Material: Durable Noryl Construction
Pump Model: ST 0512
Includes wire splice kit for quick and easy installation
Upgrade your submersible well pump system with GolPumps’ energy-efficient, durable, and high-performance pump, designed for reliable water supply and long-term operation.
Order Now for Fast Shipping & Trusted Performance!
| Model | Pump | ST 5-12 |
| Motor | 4CF2606M | |
| Brand | Gol Pumps | |
| Manufacturer’s Warranty | 1 years Limited Warranty | |
| P2 | kW | 0.37 |
| HP | 0.5 | |
| Service Factor | 1.15 | |
| Material | Pump | Noryl |
| Motor | Noryl | |
| Voltage – Phase | 115V Or 230V– Single Phase | |
| Wire | 2 | |
| In | A | 7.1 |
| Imax | A | 9.3 |
| Istart | A | 26.9 |
| PF (%) | Allowable Load | 0.94 |
| Overload Factor | 0.97 | |
| Efficiency (%) | Allowable Load | 50.8 |
| Overload Factor | 58.8 | |
| R.P.M | 3450 | |
| Thrust | N | 2000 |
| Capacitor | UF | 45UF 250V |
| Cable | AWG | 14 |
| Length (ft.) | 3.9 | |
| Production Country | Taiwan | |
Performance Curves
| Pump Model | Motor | Q Capacity 3500RPM | |||||||
| kW | HP | Gal/Min | 0 | 2.6 | 4 | 5.3 | 6.6 | 7.9 | |
| ST 5-12 | 0.37 | 0.5 | Head (ft.) | 374 | 321.5 | 278.9 | 223.1 | 160.8 | 91.9 |
Dimensions and Weights
| Outlet | Motor Dia. | Dimensions (inch) | Weight (lb) | |||||
| A | B | C | D | Pump | Motor | Pump + Motor | ||
| NPT 1 1/4″ | 4″ | 14.1″ | 1 1/4″ | 3.9″ | 26.2″ | 7.9 | 20.5 | 28.4 |
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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