Which type of valve is known as a quick opening valve?

A ball valve is known as a quick opening valve because it allows for rapid flow control with a simple quarter turn of its handle. This design features a spherical disc (the ball) that has a hole through the middle. When the handle is turned 90 degrees, the hole aligns with the pipe, allowing liquids or gases to flow through almost instantaneously. This makes ball valves particularly advantageous in applications where quick shut-off or flow control is critical.

In contrast, other valve types such as gate valves and globe valves operate differently. Gate valves, for instance, generally require several turns to open or close and are not designed for rapid operation; they are better suited for situations where full flow or shut-off is required. Globe valves, while suitable for throttling flow, also require more rotation and are not classified as quick opening devices. Check valves, on the other hand, automatically prevent backflow and do not have a manual operation mechanism associated with rapid opening and closing. Thus, the design and functionality of the ball valve unequivocally categorize it as the quick opening valve.