Due to the rapid development of vacuum application technology, double-stage water-ring vacuum pump has been paid more attention in obtaining coarse vacuum. Because the gas compression in the water ring pump is isothermal, it can extract flammable and explosive gases, in addition, it can also extract gas containing dust and water. Therefore, the application of double-stage water ring vacuum pump is increasing.
2SK Liquid Ring Vacuum Pump
Double stage water ring vacuum pump application:
1. chemical industry
2. oil
3. light workers
4. medicine
5. food industry
6. vacuum filtration
7. vacuum feeding
8. vacuum concentration
9. vacuum degassing
10. vacuum evaporation
We know that the two-stage water ring vacuum pump is widely used, but how does the principle of the two-stage water ring vacuum pump work? Now let’s learn about the principle of two stage water ring vacuum pump. Let me have a better understanding of the double stage water ring vacuum pump.
Technical Parameters：
| Model | Suction capacity | Ultimate vacuum | Power | speed | Water supply | Inlet/outlet diam | Water inlet |
| m³/min | MPa（G） | KW | r/min | L/min | DN(mm） | (mm) | |
| 2SK1.5 | 1.35 | -0.097 | 4 | 1440 | 10-15 | 40 | G1/2” |
| 2SK-3 | 2.7 | -0.098 | 7.5/11 | 1440 | 15-20 | 40 | G1/2” |
| 2SK-6 | 5.4 | -0.098 | 15 | 1460 | 25-35 | 65 | G1/2” |
| 2SK-12 | 10.8 | -0.098 | 22/30 | 970 | 40-50 | 100 | G1/2” |
| 2SK-20 | 18 | -0.098 | 45 | 740 | 60-80 | 125 | G3/4” |
| 2SK-30 | 27 | -0.098 | 55/75 | 740 | 70-90 | 125 | G3/4” |
Proper amount of water is used as working fluid in the pump body. When the impeller rotates clockwise in the direction indicated, the water is thrown around by the impeller. Due to the centrifugal force, the water forms a closed ring which is approximately equal to the thickness of the pump cavity. The inner surface of the upper part of the water ring is just tangent to the hub of the impeller, and the inner surface of the lower part of the water ring is just in contact with the tip of the blade (in fact, the blade has a certain depth of insertion in the water ring). At this point, a one-month conodont space is formed between the hub and the water ring of the impeller, and this space is divided into several small cavities with the same number of blades by the impeller. If the upper part of the impeller is taken as the starting point, the volume of the small cavity increases from small to large at 180 degrees before the impeller rotates, and is connected with the suction port on the end face. At this time, the gas is sucked in, and the small cavity is isolated from the suction port when the suction is finished. When the time is passed, the gas is discharged out of the pump.
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