A gate valve is designed to turn the flow of liquid through pipes on and off. It is generally used on a valve that is not used frequently. It is also helpful in controlling the flow of pressure through the pipes and valves. Also known as a sluice valve, it controls flow by moving a round or rectangular wedge in and out of the liquid path.Continue Reading
Gate valves most commonly come in two varieties. The parallel gate valve uses a flat disc to shut off and control the fluid pressure. It creates a seal to prevent leakage. Parallel gate valves also have two types: knife valves and through-conduits. The knife valve has a sharp bottom to cut through any solids passing through the pipe. The through-conduit is rectangle shaped with a circular opening to allow fluid to flow when it is lowered.
Wedge-shaped gate valves allow for the fluid to be tightly shut off and come in three separate designs. The split wedge allows for disk flexibility. This flexibility helps the valve to seal easily. Solid wedges are simple and strong. They are the most common valve because they are suitable for almost every situation. Flexible wedge valves are mostly used for steam systems and are available in a variety of different sizes and shapes.Learn more about Motion & Mechanics
One method of pouring a liquid without spilling it involves holding a small rod, such as chopstick, across the opening over the second container. As the liquid is slowly tipped out, it travels the length of the rod instead of pouring forth or running down the side of the glass.Full Answer >
Surface tension is caused by the attraction between liquid molecules along the surface of the liquid. Most of the molecules in a liquid have several neighboring molecules that they interact with, but the molecules along the surface have no neighboring molecules above them, which increases the strength of the surface molecules with each other.Full Answer >
The force that slows down the movements of an object through a liquid or gas is known as drag, or air resistance. In some cases, this force is also referred to as friction, but classically, friction occurs in solid objects.Full Answer >
Buoyant force is directly proportional to the density of a liquid or any fluid in general. This relationship can be represented by the equation Fb = dgv, where "Fb" denotes the buoyant force, "d" indicates the density of a fluid, "g" represents the acceleration due to gravity and "v" is the volume of the submerged object.Full Answer >