DESCRIPTION The 2SK series two-stage liquid ring vacuum pumps are designed to operate efficiently like two sets of SK series water ring vacuum pumps. While SK series pumps can achieve a maximum vacuum of -700mmHg, the 2SK series was developed in the 1980s to meet the need for higher vacuum and greater pumping speed under high vacuum conditions. This advancement allows for more efficient operation in various industrial applications. ADVANTAGE FEATURES PARAMETER APPLICATION Regular Selection for Water (Liquid) Ring Vacuum Pump 3, Choose the dynamic seal of the shaft: 5, The motor should be selected based on pumping pressure.
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WORK THEORY
Model
Displacement
(m3/min)
Ultimate Pressure
hPa   Torr
Motor Power
 (kW)
Rotating Speed
(rpm)
Water Supply
(L/min)
Inlet & Outlet Dimensions (mm)
Weight
(kg)
SK-0.5B
0.5
47 Â Â 35
1.5
2900
8
25
45
SK-0.8
0.8
47 Â Â 35
2.2
2900
10
40
60
SK-1.5
1.5
47 Â Â Â 35
4
2900
15
40
75
SK-3
3
80 Â Â Â 60Â
5.5
1450
25
50
153
SK-6
6
80 Â Â Â 60Â
11
1450
35
50
210
SK-12
12
80 Â Â Â 60Â
22
980
70
100
600
SK-12B
12
80 Â Â Â 60Â
18.5
980
60
100
450
SK-25
25
80 Â Â Â 60Â
45
980
70
100
900
SK-30
30
80 Â Â Â 60Â
55
980
75
100
1200
SK-42
42
80 Â Â Â 60
75
740
100
100
1500
2SK-2B
2
40 Â Â Â 30
5.5
1450
20
50
185
2YK-2B
2
6.6 Â Â 5
5.5
1450
20
50
185
2SK-3
3
40 Â Â 30
7.5
1450
25
50
320
2YK-3
3
6.6 Â Â 5
7.5
1450
25
50
320
2SK-6B
6
33 Â Â 30
11
1450
35
50
370
2YK-6B
6
6.6 Â Â 5
11
1450
35
50
370
2SK-12
12
33 Â Â 25
22
980
70
80
850
2YK-12
12
6.6 Â Â 5
22
980
70
80
850
2SK-25
25
33 Â Â 25
55,45
980
60-110
100
926
These pumps are ideal for vacuum drying, vacuum degassing, vacuum concentration, vacuum evaporation, and vacuum impregnation processes in industries such as chemical, pharmaceutical, metallurgy, food, medicine, textile, papermaking, and electronics. They can be combined with Roots vacuum pumps and atmospheric jet pumps to create a vacuum system that achieves high vacuum, high efficiency, and low power consumption.
1, Based on the vacuum value
(1) If the pump is operated for long time with the inlet pressure range between 1.3×10â´~1×10âµ Pa (between 100 and 760 Torr), choose the SK series water ring vacuum pump.
(2) If the pump is operated for long time with the inlet pressure range between 5×10³~1.3×10ⴠPa (between 40 and 100 Torr), choose the 2SK series water ring vacuum pump.
(3) If the pump is operated for long time with the inlet pressure range between 1×10³~1.3×10ⴠPa (between 8 and 100 Torr), choose the 2YK series liquid ring vacuum pump.
2, Working Media
There are four principles to choose working media (i.e., ring liquids):
(1) Lower saturated steam pressure
(2) Lower viscosity
(3) Stable physical & chemical features; no chemical reaction with the pumped gas; no corrosion to the pump; no pollution to the environment.
(4) Economy
Choose the packing seal in general occasions; choose the mechanical seal when the pump is used in a non-leakage situation.
4, Choose the material of the part that the gas passed:
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6, Composition methods of the water ring vacuum pump system
The open circulation system should be used if the working liquid in the outlet does not need to be circulated or only partially circulated.
The closed circulation system should be used if the working liquid in the outlet must be circulated.
Motor Direct Connection Type Water Ring Vacuum Pump
Model NO.: 2SK-3
Motor Power: 55kw,45kw
Rotating Speed: 980rpm
Water Supply: 60-110L/Min
Inlet & Outlet Dimensions: 100mm
Weight: 926kg
Trademark: DVE
Transport Package: Plywood Case
Specification: European Market Standard
Origin: Zhejiang, China
HS Code: 8414100090
1. Compared with SK water vacuum pumps, it offers higher vacuum levels and improved pumping speed.
2. The design is simple, making maintenance easy and cost-effective.
3. The primary working medium is water, which keeps maintenance costs low.
4. These pumps are widely used across multiple industries, including handling water vapor, flammable, explosive gases, and other substances containing small amounts of dust or liquid.
5. They are capable of operating in harsh environments, ensuring reliability even under challenging conditions.
1. The SK and 2SK series water ring vacuum pumps can handle both ordinary gases and condensable gases such as water vapor. Their isothermal compression feature makes them suitable for flammable and explosive gases. When constructed from anti-corrosion materials, they can also manage corrosive gases effectively.
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2. The 2YK series liquid ring vacuum pumps offer higher vacuum performance and broader applicability. By selecting the appropriate working medium, different types of gases can be pumped efficiently, expanding their range of use.
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3. These pumps operate smoothly, with low noise and energy consumption. They are 30% more energy-efficient compared to water jet and water vapor jet pumps.
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When using water as the working medium, the optimal supply water temperature should be below or equal to 15°C; the highest should not exceed 40°C. For transformer oil or other low viscosity and low saturated vapor pressure industrial oils, the general supply temperature should not exceed 40°C, and the working medium temperature inside the pump chamber should not exceed 60°C. Under special circumstances, when a liquid with a lower boiling point is selected, a cooling unit must be equipped to cool the working medium to ensure the maximum temperature is between 30°C-50°C, below the boiling point. For closed circulation systems, a liquid storage unit and cooler must be installed, and a gas-liquid separator must be placed at the outlet. A mechanical seal should be used for the shaft's dynamic seal.
(1) For the non-anti-corrosion pump, the shaft is made of 45# steel or 40Cr, and other parts are made of cast iron or brass;
(2) For the anti-corrosion pump, the parts that the gas passed should be made of stainless steel 304 and 306, or other materials suitable for the respective corrosive gas, or the parts should be coated with anti-corrosion material.
If the pump is used for vacuuming while transferring gas, the pressure at the pump outlet exceeds standard atmospheric pressure.
When the outlet pressure exceeds 0.15MPa, a special double-stage liquid ring compressor should be chosen instead of a vacuum pump. The power of the equipped motor should be significantly increased, and a special gas-liquid separator and automatic drain unit should also be included.
When the outlet pressure is below 0.15MPa, the vacuum pump can be modified into a compressor. The power of the equipped motor should be increased appropriately.