High Quality Water Ring Pump for Vacuum Evaporation

Model NO.: SK-30A
Displacement: 30m³/Min
Ultimate Pressure: 80hPa 60torr
Motor Power: 55kw
Rotating Speed: 740rpm
Water Supply: 100L/Min
Inlet & Outlet Dimensions: 100mm
Weight: 1200kg
Trademark: DVE
Transport Package: Neutral Package
Specification: CE MARK, PARTS OF HIGH LEVEL
Origin: Zhejiang, China
HS Code: 8414100090

SPECIFICATION

Products Name: Water Ring Vacuum Pump


High Quality Water Ring Pump for Vacuum Evaporation
PS: The Picture is ONLY for reference, detailed model refer to REAL PIECE pls.

WORKING THEORY

The SK and 2SK series water ring vacuum pumps are ideal for removing both non-condensable and condensable gases such as water vapor. These pumps operate with isothermal compression, making them safe for flammable and explosive gases. With anti-corrosive materials, they can also handle corrosive gases effectively.
The 2SK series two-stage liquid ring pump functions like two sets of SK series pumps. Since the SK series reaches a maximum vacuum of -700 mmHg, the 2SK series was developed in the 1980s to achieve higher vacuum levels and greater pumping speed under high vacuum conditions.
The 2YK series liquid ring pumps offer higher vacuum capabilities and broader applicability. By selecting suitable working media, different types of gases can be pumped efficiently, expanding their use in various industries.
These pumps run smoothly, have low noise, and consume less energy. Compared to water jet and water vapor jet pumps, they save about 30% in energy usage.

High Quality Water Ring Pump for Vacuum Evaporation

High Quality Water Ring Pump for Vacuum Evaporation

ADVANTAGE

Compared to the SK series, this pump offers higher vacuum and pumping speed. It has a simple structure and is easy to maintain. The primary working medium is water, which keeps maintenance costs low. It is widely used in various industries for handling water vapor, flammable, explosive, and gases containing small amounts of dust and liquid. Additionally, it performs well in harsh environments.

PARAMETER

Model Displacement
(m³/min)		 Ultimate Pressure Motor Power(kW) Rotary Speed(rpm) Water Supply(L/min)

Inlet & Outlet

Dimensions (mm)

Weight

(kg)
hPa Torr
SK-0.5B 0.5 47 35 1.5 2900 8 1" 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-9 9 80 60 18.5 980 55 80 400
SK-12 12 80 60 22 980 70 128 600
SK-12B 12 80 60 18.5 980 60 100 450
SK-20 20 80 60 45 980 70 100 800
SK-25 25 80 60 45 980 70 100 900
SK-30A 30 80 60 55 740 100 100 1200
SK-42 42 80 60 75 740 100 100 1500

APPLICATION

This pump is ideal for applications such as vacuum drying, vacuum degassing, vacuum concentration, vacuum evaporation, and vacuum impregnation in industries like chemical, pharmaceutical, metallurgy, food, medicine, textile, papermaking, and electrical (especially electronics). It can be combined with Roots Vacuum Pumps and atmospheric jet pumps to create a high-vacuum system that is efficient and energy-saving.

Regular Selection for Water (Liquid) Ring Vacuum Pump


1. Based on the vacuum value
(1) If the pump operates for long periods at an inlet pressure between 1.3×10⁴~1×10⁵ Pa (between 100 and 760 Torr), choose the SK series water ring vacuum pump.
(2) If the pump operates for long periods at an inlet pressure between 5×10³~1.3×10⁴ Pa (between 40 and 100 Torr), choose the 2SK series water ring vacuum pump.
(3) If the pump operates for long periods at an inlet pressure between 1×10³~1.3×10⁴ Pa (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 and chemical properties; 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 supply water temperature should be below or equal to 15°C; the highest should not exceed 40°C. When using transformer oil or other low-viscosity and low-saturated vapor pressure industrial oils, the general supply temperature should not exceed 40°C, and the temperature inside the pump chamber should not exceed 60°C. In special cases where a liquid with a lower boiling point is used, a cooling unit must be equipped to ensure the maximum temperature is 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.


3. Choose the dynamic seal of the shaft:
Select a packing seal for general occasions; use a mechanical seal when the pump is used in a leak-free environment.

4. Choose the material of the part that the gas passed:

(1) For non-anti-corrosion pumps, the shaft is made of 45# steel or 40Cr, and other parts are made of cast iron or brass;
(2) For anti-corrosion pumps, the parts that the gas passes through should be made of stainless steel 304 and 306, or other materials suitable for the respective corrosive gas, or these parts should be coated with anti-corrosion material.


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

If the pump is used for vacuuming while transferring gas, the outlet pressure of the pump 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. Additionally, a special gas-liquid separator and automatic drainage unit should be installed.
When the outlet pressure is below 0.15MPa, the vacuum pump can be refitted as a compressor. The power of the equipped motor should be increased appropriately.


6. Composition methods of the water ring vacuum pump system
An open circulation system should be used if the working liquid in the outlet does not need to be circulated or only partially circulated.
A closed circulation system should be used if the working liquid in the outlet must be circulated.

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