👉 Valvules are a type of valve in which the fluid flow is controlled by a valve and not by an external source. They are often used in mechanical systems, such as pumps or valves, to control the flow rate or pressure. The term "valvule" comes from the Latin word "valvula," meaning "opening." In the context of valves, the term "valvule" refers to a valve that allows fluid flow through it.