Search results
Results from the WOW.Com Content Network
A hair clipper, often individually called the apparent plurale tantum hair clippers (in a similar way to scissors), is a specialised tool used to cut human hair. Hair clippers work on the same principle as scissors , but are distinct from scissors themselves and razors .
A control valve is a valve used to control fluid flow by varying the size of the flow passage as directed by a signal from a controller. [1] This enables the direct control of flow rate and the consequential control of process quantities such as pressure , temperature , and liquid level.
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]
Traditional control valves make it inevitable. As we size a control valve, the K v calculated almost certainly will not match the K v of the nearest appropriate valve. For example, a K v calculation of 4.5 m 3 /h would most likely lead to the selection of a valve with a K v = 6.3 m 3 /h. This means the valve is capable of delivering 40% more ...
The pressure at which the control pilot relieves is the functional set pressure of the PORV. When the pilot valve reaches set pressure it opens and releases the pressure from the dome. The piston is then free to open and the main valve exhausts the system fluid. The control pilot opens either to the main valve exhaust pipe or to atmosphere ...
Alberta Clipper (also known as Enbridge's Line 67) is an oil pipeline in North America. It is owned and operated by Enbridge and is part of the extensive Enbridge Pipeline System . The pipeline runs from Hardisty, Alberta , in Canada, to Superior, Wisconsin , in the United States, integrating the company's Canadian oil sands pipeline system ...
A zone valve is a specific type of valve used to control the flow of water or steam in a hydronic heating or cooling system. In the interest of improving efficiency and occupant comfort, such systems are commonly divided up into multiple zones. [ 1 ]
Wahl Clipper Corporation was founded due to Leo J. Wahl's patent for an electromagnetic hair clipper in 1919. [3] On February 2, 1921, he purchased a majority of the stock of his uncle's manufacturing company which made the clipper, and incorporated the business as Wahl Clipper Corporation. [4] In 1924, Leo Wahl patented a vibrating motor hair ...