Ductile Gate Valves

gate valves
(Gate valve) A valve with a circular-shaped closing element that fits securely over an opening through which water flows. A valve that utilizes a disc moving at a right angle to the flow to regulate the rate of flow. When a gate valve is fully opened, there is no obstruction to the flow.
(GATE VALVE) A two-way valve that may be opened or closed to block the flow of fluid in a passage. Normally manually operated, but may be automated, especially for larger sizes.
A valve with a sliding part that controls the extent of the aperture
(Gate valve) A gate valve, also known as a sluice valve, is a valve that opens by lifting a round or rectangular gate/wedge out of the path of the fluid.

ductile
(of a metal) Able to be drawn out into a thin wire
Able to be deformed without losing toughness; pliable, not brittle
easily influenced
capable of being shaped or bent or drawn out; "ductile copper"; "malleable metals such as gold"; "they soaked the leather to made it pliable"; "pliant molten glass"; "made of highly tensile steel alloy"
(ductility) the malleability of something that can be drawn into threads or wires or hammered into thin sheets
(of a person) Docile or gullible