Sk/2sk Type Water Circulating Vacuum Pump

Model NO.: 2SK-30A
Ultimate Pressure: 33 hPa 25 Torr
Motor Power: 55 kW
Rotating Speed: 980 rpm
Water Supply: 60-110 L/Min
Inlet & Outlet Dimensions: 100 mm
Weight: 1300 kg
Certification: CE, ISO9001
Sea Port: Ningbo/Shanghai
Delivery Time: Based on Factory Production Schedule
Trademark: DVE
Transport Package: Neutral Wooden Case
Specification: CE Mark, Spare Parts of High Level
Origin: Zhejiang, China
HS Code: 8414100090

DESCRIPTION

The 2SK series two-stage liquid ring vacuum pumps are designed to operate efficiently in a variety of industrial applications. These pumps can achieve higher vacuum levels and greater pumping speeds compared to the traditional SK series water ring vacuum pumps. Developed in the 1980s, the 2SK series was introduced to meet the growing demand for high vacuum and large pumping capacity under such conditions. The design allows for better performance when dealing with gases that require high vacuum levels.
Sk/2sk Type Water Circulating Vacuum Pump

ADVANTAGE

1. Compared to SK water vacuum pumps, the 2SK series offers improved vacuum levels and pumping speed.
2. Simple structure and easy maintenance make it user-friendly.
3. The primary working medium is water, which ensures low maintenance costs.
4. The pump is suitable for various industries and can handle water vapor, flammable, explosive, and gases containing small amounts of dust and liquid.
5. It performs well even in harsh environments.
 

FEATURES

1. The SK and 2SK series water ring vacuum pumps are versatile, capable of handling both ordinary and condensable gases (such as water vapor). Due to their isothermal compression characteristics, they can safely handle flammable and explosive gases. When constructed from anti-corrosion materials, they are also suitable for corrosive gas applications.
 
2. The 2YK series liquid ring vacuum pumps offer higher vacuum levels and broader applicability. By selecting appropriate working media, different types of gases can be effectively pumped, making them suitable for a wide range of applications.
 
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.

WORK THEORY

Sk/2sk Type Water Circulating Vacuum Pump
 

PARAMETER

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

APPLICATION
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.

Regular Selection for Water(Liquid)Ring Vacuum Pump
1, Based on the vacuum value
(1) If the pump is operated for long time with the inlet pressure range between 1.3×10⁴~1×10⁵ 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 5×10³~1.3×10⁴ Pa (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 1×10³~1.3×10⁴ Pa (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

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 30°C-50°C, 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.

3, Choose the dynamic seal of the shaft:
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:

(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.
 

5, The motor should be selected based on pumping pressure.

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.


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.


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