Sk-25 Single Stage Water Ring Vacuum Degassing Pump

August 10 07:26:00, 2025

Model NO.: SK-25
Motor Power: 55kw, 45kw
Rotating Speed: 980rpm
Water Supply: 60-110L/Min
Inlet & Outlet Dimensions: 100mm
Weight: 926kg
Trademark: DVE
Transport Package: Wooden Case
Specification: CE MARK, ABB MOTOR, SPARE PARTS OF HIGH LEVEL
Origin: Zhejiang
HS Code: 8414100090

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. While the SK series pumps can only achieve a maximum vacuum of -700mmHg, the 2SK series was developed in the 1980s to meet the demand for high vacuum and large pumping speed under such conditions.
Sk-25 Single Stage Water Ring Vacuum Degassing Pump

ADVANTAGE

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, resulting in low maintenance costs.
4. Widely used in various industries for suction of water vapor, flammable, explosive gases, and gases containing small amounts of dust and liquid.
5. Operates effectively in harsh conditions.
 

FEATURES

1. Series SK and 2SK Water Ring Vacuum Pumps can exhaust both ordinary and condensable gases (such as water vapor). They have the feature of isothermal compression, making them suitable for exhausting flammable and explosive gases. When made from anti-corrosion materials, they can also handle corrosive gases.
 
2. Series 2YK Liquid Ring Vacuum Pumps offer higher vacuum and better applicability. Different types of gases can be pumped using selected working media, allowing broader application ranges.
 
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-25 Single Stage Water Ring Vacuum Degassing 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
This pump is widely used in vacuum drying, vacuum degassing, vacuum concentration, vacuum evaporation, and vacuum impregnation processes across industries such as chemical, pharmaceutical, metallurgy, food, medicine, textile, papermaking, and electrical (electronic industrial field). 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), 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), 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), 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 media under some special circumstances, a cooling unit must be equipped to cool down the working media 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 no-leak occasions.

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 materials suitable for the respective 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 the pump outlet exceeds the standard atmosphere pressure.
When the outlet pressure exceeds 0.15MPa, a special double-stage liquid ring compressor should be chosen instead of a vacuum pump refitted. The power of the equipped motor

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