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SOW
tqpumps
Product Features
The SOW series horizontal single-stage double-suction centrifugal pump adopts a horizontally split double volute casing, matched with a double-suction self-balancing impeller for stable operation and automatic axial force cancellation. It is equipped with a thickened corrosion-resistant pump shaft featuring high rigidity and long service life, and sealing system ensures reliable sealing and leak prevention. Supported by double-end bearings, it runs smoothly with low vibration and noise. Paired with a standard flange base, it enables convenient installation and strong adaptability, featuring an efficient, durable structure and easy maintenance. With an outlet diameter ranging from DN80 to DN500, it is designed for medium and large flow, medium and high head fluid delivery. Adopting CFD fluid optimization and a double-suction structure, it serves as a energy-saving split-case pump for municipal, industrial, HVAC, fire protection, water conservancy and other fields, suitable for conveying clean water and clean water-like media. |  |
Working Principle
The SOW double-suction pump works on centrifugal force , and realizes axial force self-balance via its symmetric double-suction structure. Its operation is as follows:
1. Priming start: The pump chamber is filled with medium; the motor drives the pump shaft and double-suction impeller to rotate rapidly.
2. Dual-end suction: Liquid enters the impeller from both sides, forming a low-pressure vacuum at the center for continuous suction.
3. Kinetic pressurization: Centrifugal force ejects liquid to the impeller edge, .flow velocity and pressure increase significantly
4. Volute diffusion: High-speed fluid passes through the double volute, slows down, gains static pressure and discharges steadily.
5. Axial force self-balance: The symmetric impeller offsets side pressure, bearing only radial load to greatly reduce wear.
Technical Parameters
| Max Flow | 3000m³/h | Voltage | 380 |
| Max Head | 150m | Frequency | 50 |
| Speed | 2950r/min and 1480r/min | Max Motor Power | 2000kW |
| Outlet Diameter | DN80-DN500 | Mounting type | IMB3 |
| Sealing type | Mechanical seal | Efficiency Level | IE3 |
| Liquid Temperature | -15℃-105℃ | Insulation Class | F |
| Maximum Operation Pressure | PN16/PN25 | Protection Class | IP55 |
| Installation | Indoor | Cooling Method | IC611 |
| Package | Wooden case | Thermal Protection | PT100 for bearing and winding |
Product Structure
| 1 | pump casing | 8 | seal ring | 15 | bearing body A | 22 | seal body(for stuffing seal) | 29 | bearing body B |
| 2 | pump cover | 9 | mechanical seal | 16 | seal gland | 23 | O-seal ring | 30 | bearing |
| 3 | use elastic baffle | 10 | mechanical seal gland | 17 | water baffle | 24 | stuffing | 31 | bearing baffle |
| 4 | key | 11 | use elastic baffle | 18 | column pin | 25 | stuffing ring | 32 | use elastic baffle |
| 5 | water-rinsing pipe part | 12 | bearing | 19 | Seal body | 26 | stuff muff | ||
| 6 | seal-ring | 13 | pump linkage | 20 | shaft | 27 | o-seal ring | ||
| 7 | impeller | 14 | key | 21 | colomn pin | 28 | packing gland part |
| 1 | bearing body B | 7 | stuffing gland | 13 | impeller | 19 | O-ring | 25 | bearing baffle |
| 2 | bearing washer | 8 | stuffing | 14 | water-rinsing pipe part | 20 | seal gland | 26 | elastic baffle |
| 3 | bearing | 9 | stuffing ring | 15 | seal ring | 21 | water baffle | 27 | shaft |
| 4 | oil-seal o rame | 10 | stuffing baffle | 16 | mechanical seal muff | 22 | O-ring | 28 | pump bearing gland |
| 5 | bearing gland | 11 | stuff muff | 17 | seal-body | 23 | nuff | 29 | roundnut |
| 6 | pump casing | 12 | pump cover | 18 | mechanical seal | 24 | bearing body A | 30 | washer |
Performance Feature
Large flow & high adaptability: The double-suction structure doubles the flow rate to meet diverse flow demands.
High efficiency & energy saving: With CFD optimization and smooth flow passages, the operating efficiency reaches up to 87%+, with a wide high-efficiency range and low long-term operation and maintenance costs.
Ultra-low vibration & noise: G6.3 dynamic balance + double volute force reduction.
Long service life & maintenance-free: Self-balancing axial force + high-quality bearings + fully sealed shaft sleeve, ensuring a long continuous operation cycle.
Strong cavitation resistance: Optimized double-suction inlet flow passages, ideal for working conditions with large liquid level fluctuations and poor suction conditions.
Easy maintenance: Horizontally split structure allows impeller/mechanical seal replacement without disassembling inlet and outlet pipelines.
Hydraulic Performance
