Slide Gate Valves

gate valves
(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.
(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.
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.

slide
a small flat rectangular piece of glass on which specimens can be mounted for microscopic study
A structure with a smooth sloping surface for children to slide down
An act of moving along a smooth surface while maintaining continuous contact with it
skid: move obliquely or sideways, usually in an uncontrolled manner; "the wheels skidded against the sidewalk"
(geology) the descent of a large mass of earth or rocks or snow etc.
A smooth stretch or slope of ice or packed snow for sledding on