The most common vacuum pump is the rotary vane pump. This pump is frequently used as a pre-vacuum pump and is available in single or double stage configurations. It operates by directly evacuating atmospheric pressure and can achieve a rough vacuum, particularly with the double stage pump. The vacuum chamber of the rotary vane pump is greased with oil, and it typically operates at a rotating speed of approximately 1500 revolutions per minute.
The rotary vane pump's popularity can be attributed to its versatility and effectiveness in creating a vacuum by removing gas molecules from a sealed volume. It is used across various industries and is particularly favored for its ability to handle direct evacuation of atmospheric pressure efficiently. The use of oil in the vacuum chamber helps maintain the sealing effect, ensuring reliable operation.
While other types of vacuum pumps exist, such as diaphragm pumps, screw pumps, and various specialized pumps like membrane pumps and cryopumps, the rotary vane pump stands out due to its widespread use and the balance it offers between performance and cost. It is also adaptable, with options for special configurations to handle reactive gases or specific environmental conditions, making it a versatile choice for many applications.
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