What type of valves are commonly used in low pressure systems?

Ball valves and gate valves are commonly used in low pressure systems due to their favorable flow characteristics and reliability. Ball valves offer the advantage of a quick shut-off capability, making them ideal for applications that require a seal to prevent backflow or leaks. Their design allows for minimal pressure drop and full-flow capability, which is essential in low pressure environments.

Gate valves, on the other hand, are primarily used for on-off control. They provide a straight-through path, ensuring a low flow resistance when fully opened. This feature is critical in low pressure systems where maintaining efficiency is important. Additionally, gate valves are designed to handle high volume flows without significant pressure loss.

Other types of valves, such as butterfly valves and pinch valves, while useful in specific applications, may not be as widely employed in low pressure systems as ball and gate valves. Check valves and relief valves serve different functions, primarily focused on preventing backflow and relieving excess pressure respectively, rather than controlling flow in low pressure systems. Similarly, solenoid valves are typically used for automated control but might not be suited for all low pressure scenarios. Thus, ball valves and gate valves are the preferred types for these applications due to their effectiveness in maintaining operational efficiency and integrity in low pressure systems.