What type of valve is also known as a fullway valve?

The term "fullway valve" refers specifically to a valve design that allows full flow through the valve when it is completely open, minimizing flow restrictions. The gate valve is classified as a fullway valve because it operates by lifting a gate or wedge out of the flow path, permitting a straight-line flow of fluid without any obstruction. This design is ideal for applications where the valve is either fully open or fully closed, as it enables efficient flow control in piping systems.

In contrast, other types of valves may not provide the same unobstructed flow characteristic. For instance, a ball valve allows for quick shutoff but may have some flow restriction when partially opened. Similarly, a butterfly valve employs a disc that can obstruct flow when partially open, and a check valve is designed to allow flow in one direction only, preventing backflow, which fundamentally alters how fluids can pass through the system. Each of these alternative valves serves specific functions in plumbing and piping systems but does not qualify as a fullway valve like the gate valve does. Thus, understanding the unique function of gate valves as fullway valves is crucial in selecting the appropriate valve for various plumbing applications.