Which type of pump is typically used in vapor recovery applications?

Study for the VI – Vapor Recovery Installation and Repair Exam. Boost your knowledge with multiple-choice and flashcard questions, complete with explanations and hints. Prepare effectively for your certification test!

In vapor recovery applications, positive displacement pumps are the preferred choice due to their ability to effectively handle the transfer of vapor and liquids with varying viscosities and flow rates. These pumps operate by trapping a fixed volume of fluid and then forcing it through the discharge, ensuring a consistent and controlled flow that is vital for vapor recovery systems.

The nature of vapor recovery often involves dealing with low pressures and potentially changing fluid properties, which makes the positive displacement mechanism advantageous. This type of pump maintains a steady flow and pressure, regardless of changes in system conditions, allowing for efficient recovery of vapors while minimizing the risk of leakage or losses during transfer.

In contrast, while other pump types such as centrifugal pumps may be efficient for certain fluid transport applications, they are generally better suited to applications with higher flow rates and less variation in fluid composition. Diaphragm pumps are beneficial in specific scenarios involving hazardous materials but do not offer the same level of control for vapor recovery processes as positive displacement pumps. Submersible pumps are primarily designed for pumping liquids from submerged environments, which may not align with the requirements of vapor recovery systems. The unique demands of vapor recovery applications highlight the effectiveness of positive displacement pumps in maintaining operational integrity and efficiency.

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