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A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. [1] Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various ...
A simple one-way ball-type check valve, in its "open" state acts as a diode in its conducting state. A pressure-actuated valve combined with a one-way check valve acts as a (field-effect) transistor. Like a one-way check valve, a diode blocks current that flows the wrong way.
Computer network diagram. A computer network diagram is a schematic depicting the nodes and connections amongst nodes in a computer network or, more generally, any telecommunications network. Computer network diagrams form an important part of network documentation.
Double check valve. A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. [ 1] It is different from the two-way check valves (sometimes erroneously referred to as double check valves) used in air brake systems on heavy trucks which select from the highest ...
The most common final control element in the process control industries is the control valve. The control valve manipulates a flowing fluid, such as gas, steam, water, or chemical compounds, to compensate for the load disturbance and keep the regulated process variable as close as possible to the desired set point. [ 1]
Simplified diagram. of linear dashpot. A dashpot, also known as a damper[citation needed], is a mechanical device that resists motion via viscous friction. [ 1] The resulting force is proportional to the velocity, but acts in the opposite direction, [ 2] slowing the motion and absorbing energy. It is commonly used in conjunction with a spring.
Shuttle valve. Shuttle valve symbol. Shuttle valve action principle cross section. A shuttle valve is a type of valve which allows fluid to flow through it from one of two sources. Generally a shuttle valve is used in pneumatic systems, although sometimes it will be found in hydraulic systems. [ 1]
Network topology is the arrangement of the elements ( links, nodes, etc.) of a communication network. [ 1][ 2] Network topology can be used to define or describe the arrangement of various types of telecommunication networks, including command and control radio networks, [ 3] industrial fieldbusses and computer networks .