Did you know that there are different kinds of Vacuum Pumps for CNC Routers? In this article, we will be comparing two kinds of Vacuum Pumps for sale at AM.CO.ZA via the Buythis.co.za website, both with 7.5Kw of power. Both are super noisy (even one with a silencer). We will be comparing the 380V 7.5kW Liquid Ring Vacuum Pump and the 380V 7.5kW 16A Regenerative Air Blower Pump. Let’s compare them based on their characteristics and applications:
First up we have the 380V 7.5kW Liquid Ring Vacuum Pump:
Power: 7.5 kW
Voltage: 380V
Type: Liquid ring vacuum pump
Operating Principle: This type of pump uses a liquid ring to create a vacuum by rotating a liquid around an eccentrically placed impeller inside the pump’s casing. The rotation of the liquid creates a temporary vacuum in the pump’s chamber, which can be used for various applications.
The Liquid Ring Vacuum Pump operates by spinning water, and through centrifugal force, the water is thrown to the outer edges of the pump, creating a vacuum in the centre. This process results in a very high vacuum level, equivalent to a significantly low air pressure, slightly below 0.1 atmospheric pressure (approximately 0.097 MPa, 0.1 bar). However, the airflow rates of this type of pump are relatively low since its primary function is not specifically designed for pulling air.
Application: Liquid ring vacuum pumps are commonly used in industrial applications where a reliable and robust vacuum source is required. They are suitable for handling wet and dirty gases, making them popular in industries like chemical processing, food processing, and wastewater treatment.
This vacuum system is well-suited for flat materials and thick materials, including the ability to work with supawood (MDF). Its primary function is to create a vacuum to hold the materials in place during processing. It’s crucial to ensure a proper seal of the table as any air leaks would disrupt the vacuum and compromise its effectiveness in securely holding the materials in position.
Then we have the 380V 7.5kW 16A Regenerative Air Blower Pump:
Power: 7.5 kW
Voltage: 380V
Type: Regenerative air blower (also known as side-channel blower or ring blower)
Operating Principle: This type of pump generates pressure and airflow through a regenerative process. The blower’s impeller rotates and creates pressure differentials within the pump, leading to air movement and compression. The air is continuously recirculated through the pump, resulting in high-pressure capabilities.
Application: Regenerative air blowers are commonly used for applications that require high-pressure air or gas delivery. They are often used in industries like pneumatic conveying, wastewater treatment, aeration in fish tanks or ponds, and various industrial processes where low to medium vacuum levels are required.
The Regenerative Pump utilizes the spinning motion of the air itself to achieve an exceptionally high air flow rate and create positive air pressure for blowing applications. It is commonly employed in various scenarios where air blowing is required. When used as a vacuum pump, it creates a strong suction force by vigorously pulling in the air. To ensure effective suction, sacrificial boards made of porous materials or with numerous holes (e.g., Supawood, MDF, and other types of boards) are recommended. This pump is particularly effective for handling thin and flexible materials such as thin plastic boards that tend to curve.
In summary, the choice between a Liquid Ring Vacuum Pump and a Regenerative Air Blower Pump depends on the specific application and requirements. If you need to create a vacuum for processes like suction, evaporation, or gas removal, the Liquid Ring Vacuum Pump is suitable. On the other hand, if you require a pump for pressurizing gases or providing a constant airflow, the Regenerative Air Blower Pump would be a better fit. Always consider the specific needs of your application, the pressure/flow requirements, and the characteristics of the gases involved before making a decision.
