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Centrifugal slurry pump introduction -
NPAH(R)-series are suitable for severe slurry conditions with coarse particles and high competency:
2.1 Two types of material for wet parts (volute liners, front and back liners, impellers):
l high-chrome alloy
l highly wear-resistant rubber
2.2 Structure of shaft seals:
l Packing gland seals
l Pressure-reducing metal/ rubber gland seals
l Mechanical seals
NPAH slurry pump performance parameters and pictures
Type | Max. Power Kw | Flow m³/hr | Head/m | Speed/rpm | Efficiency % | NPSH m | Nos of Vane | Diameter mm |
1.5X1 B-NPAH | 15 | 12.6-28.8 | 6-68 | 1200-3800 | 40 | 2-4 | 5 | 152 |
2X1.5 B-NPAH | 15 | 32.4-72 | 6-58 | 1200-3200 | 45 | 3.5-8 | 5 | 184 |
3X2 C-NPAH | 30 | 39.6-86.4 | 12-64 | 1300-2700 | 55 | 4-6 | 5 | 214 |
4X3 C-NPAH | 30 | 86.4-198 | 9-52 | 1000-2200 | 71 | 4-6 | 5 | 245 |
6X4 D-NPAH | 60 | 162-360 | 12-56 | 800-1550 | 65 | 5-8 | 5 | 365 |
8X6 E-NPAH | 300 | 360-828 | 10-61 | 500-1140 | 72 | 2-9 | 5 | 510 |
10X8 F-NPAH | 560 | 612-1368 | 11-61 | 400-850 | 71 | 4-10 | 5 | 686 |
12X10 ST-NPAH | 560 | 936-1980 | 7-68 | 300-800 | 82 | 6 | 5 | 762 |
14X12 ST-NPAH | 560 | 1260-2772 | 13-63 | 300-600 | 77 | 3-10 | 5 | 965 |
16X14 TU-NPAH | 1200 | 1368-3060 | 11-63 | 250-550 | 79 | 4-10 | 5 | 1067 |
20X18 TU-NPAH | 1200 | 2520-5400 | 13-57 | 200-400 | 85 | 4-10 | 5 | 1370 |
NPAH slurry pump construction drawing
NPAH mining slurry pump selection chart
CE, SGS, ISO9001 Certification
Possible faults and removal
Type NPAH slurry pump has a compact construction. If it is correctly installed and operated, the pump will have a long life.
Faults | Reason | Removal |
Pump fails to discharge any liquid. | Incorrect direction of pump rota- tion and impeller worn. Suction pipe blocked | Check direction of rotation and replace a new impeller |
Power consumption on shaft is excessive | Rotating component is rubbing on a stationary part. Bearing worn. Drive belt tension too tight Flow rate too large Pump speed and ratio too high. Misalignment or unparallel of ddrive shaft and pump shaft. | Removal the rub Replace the bearing Adjust belt Modify the pump duty and speed. Adjust drive and pump shaft |
Bearing is over hearing | Lubricants too much or less. Containing impurities in the lubricant Bearing worn. | Lubricating as requirements. Replace clean lubricant. Replace new bearing. |
Bearing has short life. | Misalignment or unparallel of drive and pump motor. Shaft bent. Impeller unbalanced due to wear Foreign object entered into the bearing or insufficient lubrication Incorrect procedure followed in fitting bearings. | Adjusting drive and pump shaft. Replacing shaft. Remove rubbing and replace new impeller Clean the bearing. Replace or refit the bearings. |
Pump vibrates or is noisy. | Bearings worn. Impeller unbalanced. Air entered into suction pipe or blocked. Flow rate is none—uniform and pump not primed. | Replaced by new bearings. Replaced by new impeller. Discharge air and remove block. Improve on the pump feeding. |
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