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, ISO 9001
Sea Port: Ningbo/Shanghai
Delivery Time: Based on Factory Production Schedule
Trademark: DVE
Transport Package: Neutral Wooden Case
Specification: CE Mark, High-Level Spare Parts
Origin: Zhejiang, China
HS Code: 8414100090

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. Due to the limitations of SK series pumps in reaching a maximum vacuum of -700 mmHg, China developed the 2SK series water ring vacuum pump in the 1980s to meet the demands for high vacuum and large pumping speed under high vacuum conditions.
Sk/2sk Type Water Circulating Vacuum Pump

ADVANTAGE

1. Compared with SK water vacuum pumps, it offers higher vacuum and pumping speed.
2. Simple structure and easy maintenance.
3. The main working medium is water, resulting in low maintenance costs.
4. Widely used in various industries for suction of water vapor, flammable, explosive, and gases containing small amounts of dust and liquid.
5. Capable of operating in harsh conditions.
 

FEATURES

1. The SK and 2SK series water ring vacuum pumps can be used for exhausting both ordinary and condensable gases (such as water vapor). Due to their isothermal compression feature, they are suitable for handling flammable and explosive gases. Pumps made from anti-corrosion materials can also handle corrosive gases.
 
2. The 2YK series liquid ring vacuum pumps offer higher vacuum and better applicability. By selecting appropriate working media, different types of gases can be pumped, making them suitable for a wider range of applications.
 
3. These pumps run 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, and vacuum impregnation processes in chemical, pharmaceutical, metallurgy, food, medicine, textile, papermaking, and electrical industries (including electronic fields). It can be combined with Roots Vacuum Pumps and atmospheric jet pumps to achieve high vacuum, high efficiency, and 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 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 transformer oil or other low viscosity and saturated vapor pressure industrial oils are used 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 a liquid with a lower boiling point is selected as the working medium under some special circumstances, a 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 circulation system of working media, a liquid storage unit and cooler must be equipped, and a gas-liquid separator must be installed at the outlet. A mechanical seal should be used for the dynamic seal of the shaft.

3, Choose the dynamic seal of the shaft:
Choose the packing seal in general occasions; choose the mechanical seal when the pump is used in a 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 coated 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 0.15 MPa, 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 0.15 MPa, 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.


Sk/2sk Type Water Circulating Vacuum Pump
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