Article Content
Product Overview
The G series vertical canned pipeline clean water pump adopts a unique fully enclosed, seal-free design. The stator and rotor are shielded with stainless steel sleeves, allowing the pumped liquid to circulate inside the motor for cooling. This design eliminates the leakage and environmental pollution problems caused by traditional mechanical seals, ensuring reliable operation and easy maintenance. The rotating components are supported by graphite bearings and lubricated by the conveyed medium, resulting in low noise and long service life. It is a green, eco-friendly, maintenance-free upgrade widely trusted by users.
G Series Type Designation
Features and Applications
1. Full-sealed, leak-free design with no mechanical seal, ensuring 100% liquid containment.
2. Stainless steel shielding sleeves protect the stator and rotor, improving corrosion resistance.
3. Liquid circulation cooling system prevents overheating and extends motor life.
4. Graphite bearing supports provide smooth operation with minimal friction.
5. Low-noise, eco-friendly structure suitable for noise-sensitive environments.
6. Maintenance-free design eliminates frequent seal or bearing replacement.
7. Applicable for HVAC hot/cold water circulation, building water supply, industrial process systems, firefighting pressure boosting, and long-distance water transport.
Operating Conditions
1. Flow range: 1–1080 m³/h; Head range: 5–105 m.
2. System pressure: ≤ 1.0 MPa or 1.6 MPa (sum of inlet pressure + head). Higher pressure available upon request.
3. Medium: Clean water or liquids similar to water in physical and chemical properties.
4. Medium temperature: ≤ 95°C for N/NY types; ≤ 150°C for GY type (with external cooling system).
5. For media below 20°C, special processing is applied for low-temperature conditions.
6. Power supply: 380V, 50Hz three-phase AC.
Structure Diagram
(Product image)
| No. | Part Name | No. | Part Name | No. | Part Name |
|---|---|---|---|---|---|
| 1 | Upper bearing seat | 6 | Graphite bearing sleeve | 11 | Shaft |
| 2 | Frame | 7 | Guide pipe | 12 | Stator shielding sleeve |
| 3 | Terminal box | 8 | Thrust bearing | 13 | Rotor shielding sleeve |
| 4 | Pump body | 9 | Rotor assembly | 14 | Lower bearing seat |
| 5 | Base | 10 | Stator | 15 | Impeller |
Performance Parameters
(Performance parameter table excerpt)
| Model | Flow (m³/h) | Head (m) | Power (kW) | Voltage (V) | Speed (r/min) | Noise (dB) | Inlet (mm) | Outlet (mm) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|
| G5-12-0.75N | 5 | 12 | 0.75 | 380 | 1500 | 45 | 40 | 40 | 65 |
| G6.3-20-1.8NY | 6.3 | 20 | 1.8 | 380 | 1500 | 50 | 40 | 40 | 105 |
| G12.5-32-4NY | 12.5 | 32 | 4 | 380 | 1500 | 50 | 50 | 50 | 203 |
| G25-20-3NY | 25 | 20 | 3 | 380 | 1500 | 50 | 65 | 65 | 125 |
| G50-20-5.5NY | 50 | 20 | 5.5 | 380 | 1500 | 55 | 100 | 100 | 225 |
| G80-32-13NY | 80 | 32 | 13 | 380 | 1500 | 60 | 125 | 125 | 373 |
| G125-50-37NY | 125 | 50 | 37 | 380 | 1500 | 70 | 125 | 125 | 580 |
Installation Instructions
1. Check all fasteners and internal components for looseness or blockage before installation.
2. The pipeline must be independently supported to prevent deformation of the pump body.
3. Install a filter (3–4 times larger than the suction diameter) before the pump inlet to prevent debris entry.
4. For hot water applications, avoid fixing the pump feet rigidly to allow for thermal expansion movement.
5. Install gate valves and pressure gauges on both inlet and outlet pipelines for safe operation within rated range.
6. Ensure correct motor wiring and rotation direction before initial startup.
7. For long pipelines, install an exhaust valve at high points to eliminate trapped air.
Troubleshooting
Problem: Pump not discharging water
Cause: Valve closed, suction blockage, reverse rotation, or air inside the chamber.
Solution: Open valves, clean pipeline, correct motor rotation, vent trapped air.
Problem: Insufficient flow
Cause: Impeller blockage, valve not fully open, or voltage too low.
Solution: Clean impeller, adjust valve opening, stabilize voltage.
Problem: Overload or high power consumption
Cause: Flow exceeding rated value, impeller rubbing, or high liquid density.
Solution: Adjust valve, check clearances, ensure proper fluid selection.
Problem: Noise and vibration
Cause: Unstable pipeline or gas mixture in medium.
Solution: Secure pipeline, vent air, reduce suction vacuum.
Problem: Motor overheating
Cause: Overload, insufficient voltage, or blocked cooling circuit.
Solution: Adjust flow, stabilize power supply, clean cooling pipes.
OEM & Custom Solutions
We offer OEM/ODM services with optional materials (cast iron, stainless steel), special voltages (220V/415V/460V), and external cooling systems for high-temperature media. Explosion-proof motors, base-mounted configurations, and flange standards (DIN/ANSI/JIS) are available. All pumps are tested to ISO9001 and CE standards for global export.
FAQs for Oversea Buyers
Q: What’s the main advantage of the G canned pump?
A: It provides zero leakage, low noise, and maintenance-free operation, ideal for modern HVAC and clean water systems.
Q: What types of liquids can it handle?
A: Clean water and liquids similar to water, with temperatures up to 150°C for the GY type.
Q: What industries use this pump?
A: HVAC, municipal water, industrial process cooling, building systems, and firefighting applications.
Q: Is the pump suitable for continuous operation?
A: Yes, the liquid-cooled design allows for long-term stable operation without overheating.
Q: What’s the typical noise level?
A: Below 65 dB under rated conditions, ensuring quiet performance for indoor environments.
Q: Do you provide voltage customization?
A: Yes, 220V, 380V, 415V, or 460V configurations are available for export requirements.
Q: What certifications do your pumps have?
A: All products comply with ISO9001 and CE standards for industrial and municipal projects.