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Product Overview
The S type single stage double suction centrifugal pump is a horizontal volute split case pump used for transporting clean water or similar liquids below 105°C. This pump offers large capacity, high efficiency, and reliable operation. It is mainly applied in water plants, air-conditioning systems, irrigation, drainage, power plants, industrial water supply, and firefighting installations.
S Series Type Designation
Example: 300S58A
300 — Pump inlet diameter (mm)
S — Single stage double suction centrifugal pump
58 — Design head (m)
A — Modified impeller outer diameter
Working Conditions
1. The pump system pressure ≤1.6 MPa (16 bar). The sum of suction pressure and head ≤1.6 MPa.
2. Medium temperature ≤105°C.
3. The medium should be clean water or liquids similar to water in physical and chemical properties.
4. The pump rotation direction: viewed from motor side, the pump rotates clockwise.
Structure Description
The S pump is horizontally split, with suction and discharge flanges cast on the lower casing. The upper cover and bearing housing can be removed without disturbing the suction/discharge pipelines. Bearings are grease-lubricated or oil-lubricated depending on size. The pump shaft is protected by replaceable sleeves to prevent wear. The impeller is double suction type, dynamically balanced to ensure smooth operation and minimal axial thrust.
Structure Diagram
(Product image)
| No. | Part Name | No. | Part Name |
|---|---|---|---|
| 1 | Pump Casing | 7 | Mechanical Seal |
| 2 | Impeller | 8 | Seal Ring |
| 3 | Shaft | 9 | Bearing Cover |
| 4 | Bearing | 10 | Pump Cover |
| 5 | Bearing Seat | 11 | Baseplate |
| 6 | Pump Shaft Sleeve | 12 | Coupling |
Main Component Materials
| Component | Material |
|---|---|
| Pump casing and cover | HT200 / QT400-15 / ZG230-450 |
| Impeller | HT200 / ZCuSn10-1 / ZG1Cr18Ni9 |
| Shaft | 45# Steel / 2Cr13 Stainless Steel |
| Seal Ring | Cast Iron / Bronze / Stainless Steel |
Performance Range
Flow: 72–16300 m³/h
Head: 8.6–140 m
Power: 3–2500 kW
Efficiency: up to 89%
Performance Table (Excerpt)
| Model | Flow (m³/h) | Head (m) | Speed (r/min) | Power (kW) | NPSHr (m) | Efficiency (%) |
|---|---|---|---|---|---|---|
| 150S78 | 160 | 78 | 2950 | 45 | 3.7 | 83 |
| 200S58A | 360 | 58 | 2950 | 90 | 4.2 | 85 |
| 250S80 | 600 | 80 | 2950 | 160 | 4.8 | 86 |
| 300S90 | 900 | 90 | 2950 | 250 | 5.2 | 87 |
| 400S75 | 1500 | 75 | 1480 | 280 | 5.5 | 88 |
| 500S90 | 2600 | 90 | 1480 | 550 | 6.0 | 89 |
Installation and Maintenance
1. Ensure the pump is filled with liquid before startup.
2. The direction of rotation must match the arrow on the casing.
3. Start with discharge valve closed, open gradually after reaching rated speed.
4. Do not regulate flow by suction valve.
5. Periodically inspect bearing temperature (<80°C) and vibration.
6. Replace mechanical seals and packing when leakage exceeds allowable limits.
7. During winter, drain water after shutdown to prevent freezing.
Common Faults and Troubleshooting
| Fault | Possible Cause | Solution |
|---|---|---|
| Pump does not discharge water | Air trapped in casing or suction line; impeller rotation reversed | Vent air; correct motor wiring |
| Flow too small | Impeller or suction blockage | Clean suction pipeline |
| Vibration and noise | Misalignment or bearing wear | Re-align coupling; replace bearings |
| Overheating | Overload or poor lubrication | Reduce load; check oil level |
Outline Dimensions (Excerpt)
(Refer to dimensional drawings on pages 12–14 of the catalog)
| Model | DN Inlet (mm) | DN Outlet (mm) | L (mm) | B (mm) | H (mm) | Weight (kg) |
|---|---|---|---|---|---|---|
| 150S78 | 150 | 100 | 950 | 320 | 430 | 210 |
| 200S58A | 200 | 150 | 1060 | 340 | 470 | 245 |
| 250S80 | 250 | 200 | 1180 | 370 | 530 | 300 |
| 300S90 | 300 | 250 | 1280 | 400 | 580 | 360 |
| 400S75 | 400 | 350 | 1450 | 480 | 650 | 540 |
| 500S90 | 500 | 450 | 1600 | 550 | 720 | 850 |
OEM & Custom Solutions
We provide OEM/ODM customization including voltage (220V/380V/415V), materials (cast iron, stainless steel, bronze), and flange standards (DIN, ANSI, JIS). Optional baseplate configurations, mechanical seal materials, and coatings available. All products comply with ISO9001 and CE standards for export.
FAQs for Oversea Buyers
Q: What kind of liquid can S pump handle?
A: Clean water or similar liquids up to 105°C with low solid content.
Q: What are its main applications?
A: Water plants, industrial systems, HVAC, irrigation, and firefighting water supply.
Q: What’s the maximum efficiency?
A: Up to 89% depending on model and flow rate.
Q: What are the advantages over vertical pumps?
A: Easier maintenance, high flow capability, and stable operation under heavy-duty conditions.
Q: Can you provide OEM customization?
A: Yes, we offer branding, packaging, and voltage customization for export clients.
Q: Which markets do you export to?
A: Widely used in Southeast Asia, Middle East, and South America for municipal and industrial projects.