DESCRIPTION The 2SK series two-stage liquid ring vacuum pumps are designed to perform efficiently like two sets of SK series water ring vacuum pumps. Due to the limitations of SK series pumps in reaching a maximum vacuum of -700mmHg, China developed the 2SK series water ring vacuum pump in the 1980s to meet the demand for high vacuum and large pumping speed under such conditions. 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 35
1.5
2900
8
25
45
SK-0.8
0.8
47 35
2.2
2900
10
40
60
SK-1.5
1.5
47 35
4
2900
15
40
75
SK-3
3
80 60
5.5
1450
25
50
153
SK-6
6
80 60
11
1450
35
50
210
SK-12
12
80 60
22
980
70
100
600
SK-12B
12
80 60
18.5
980
60
100
450
SK-25
25
80 60
45
980
70
100
900
SK-30
30
80 60
55
980
75
100
1200
SK-42
42
80 60
75
740
100
100
1500
2SK-2B
2
40 30
5.5
1450
20
50
185
2YK-2B
2
6.6 5
5.5
1450
20
50
185
2SK-3
3
40 30
7.5
1450
25
50
320
2YK-3
3
6.6 5
7.5
1450
25
50
320
2SK-6B
6
33 30
11
1450
35
50
370
2YK-6B
6
6.6 5
11
1450
35
50
370
2SK-12
12
33 25
22
980
70
80
850
2YK-12
12
6.6 5
22
980
70
80
850
2SK-25
25
33 25
55, 45
980
60-110
100
926
It can be applied to vacuum drying, vacuum degassing, vacuum concentration, vacuum evaporation, vacuum impregnation processes in chemical, pharmaceutical, metallurgy, food, medicine, textile, papermaking, electrical industry (electronic industrial field), and so on. It can compose a vacuum system together with Roots Vacuum Pump and atmospheric Jet pump to achieve high vacuum, high efficiency, 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), please choose series SK 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), please choose series 2SK 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), please choose series 2YK 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 occasion; choose the mechanical seal when the pump is used in no leak occasion.
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 opening circulation system should be used if the working liquid in the outlet need not be circulated or 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 pump, it achieves higher vacuum and pumping speed.
2. Simple structure and easy maintenance.
3. The working medium is mostly water, leading to low maintenance costs.
4. The pump is widely used in various areas, capable of handling water vapor, flammable, explosive gases, and gases containing small amounts of dust and liquid.
5. The pump can operate in harsh conditions.
1. Series SK and 2SK Water Ring Vacuum Pumps can be used to exhaust both ordinary gases and condensable gases (such as water vapor). Due to their isothermal compression feature, they can handle flammable and explosive gases. When made from anti-corrosion materials, they can also be used for corrosive gases.
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2. Series 2YK Liquid Ring Vacuum Pumps offer higher vacuum and better applicability. By selecting suitable working media, different types of gases can be pumped, allowing them to be applied in a wider range.
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3. These pumps operate smoothly with low noise and consumption. They are 30% more energy-efficient compared to Water Jet and Water Vapor Jet Pumps.
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If the water is selected as the working medium, the best temperature of supply water should be lower than or equal to 15°C; the highest one should not be higher than 40°C. While the transformer oil or other low viscosity and saturated vapor pressure industrial oils are as the working media, the general supply temperature should not exceed 40°C and the working media temperature inside the pump chamber should not be higher than 60°C. When the liquid with lower boiling point is selected as the working media under some special circumstances, the cooling unit must be equipped to cool down the working media in order to ensure that the max temperature is 30ºC-50ºC, lower than the boiling point. For the closed circulated system of working media, the liquid storage unit and cooler must be equipped, and the gas-liquid separator must be installed at outlet. The mechanical seal should be used for dynamic seal of the shaft.
(1) For the non anti-corrosion pump, the shaft is made of 45# steel or 40Cr, 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 material suitable for the respectively corrosive gas, or the parts should be put with anti-corrosion coating.
If the pump is used for vacuuming while transferring gas, the pressure of pump outlet exceeds the standard atmosphere pressure.
When the outlet pressure exceeds 0.15MPa, the special double-stages liquid ring compressor should be chosen and not the vacuum pump refitted. The power of the equipped motor should be increased obviously. And the special gas-liquid separator and auto-drain unit should be equipped too.
When the outlet pressure is below 0.15MPa, it can use the vacuum pump refitted as compressor. The power of the equipped motor should be increased properly.