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A ball valve (like the butterfly valve, one of a family of valves called quarter turn valves) is a valve that opens by turning a handle attached to a ball inside the valve. The ball has a hole, or port, through the middle so that when the port is in line with both ends of the valve, flow will occur. When the valve is closed, the hole is perpendicular to the ends of the valve, and flow is blocked. The handle position lets you 'see' the valve's position.

Ball valves are durable and usually work to achieve perfect shutoff even after years of di ....etc

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Display devices form an important group of devices in the electro industry. With the evolution of high definition TV (HDTV), video conferencing and other advancements in video applications, their importance is increasing. Traditionally cathode ray tubes (CRTs) are used in display devices. But the industry is searching for devices with high resolution and fill ratios that cannot be achieved in CRTs. LCDs can be use an alternative but they are not cost effective. An entirely new type of devices based on Grating Light Valve technology solves all t ....etc

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A Butterfly valve is a type of flow control device, used to make a fluid start or stop flowing through a section of pipe. The valve is similar in operation to a ball valve. A flat circular plate is positioned in the center of the pipe. The plate has a rod through it connected to a handle on the outside of the valve. Rotating the handle turns the plate either parallel or perpendicular to the flow of water, shutting off the flow. It is a very robust and reliable design. However, unlike the ball valve, the plate does not rotate out of the flow of ....etc

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Grating Light Valve Display Technology

The Cathode Ray Tube TV set has ruled the consumer electronics world for decades. Now a days every one wants big screens for their entertainment rooms. But bigger a CRT screen, the glass tube will be deeper and the set becomes impossibly heavy and unwieldy when the diagonal measurement of the screen goes beyond about 36 inches. Thus the CRT is destined for a slow but sure decline giving way to many new technologies.

All of us must have noted the red colour of the hero's suit in the movie 'spiderman', ....etc

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Valve timing is the regulation of the points in the combustion cycle, at which the valves are set to open and close. Since the valves require a finite period of time in which to open or close without abruptness, a slight lead-time is always necessary for proper operation. The design of the valve-operating cam provides for the smooth transition from one position to the other, while the cam setting determines the timing of the valve.

In a typical four-stroke engine, the inlet valve is set to open before TDC (top dead centre), towards the end o ....etc

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The present day requirement for high performance from a medium power engine has resulted in generally higher maximum crank shaft speeds, typically in the region 5500 ? 6000 rpm. This can be explained by recalling the factors governing the power output of an engine since, if neither piston displacement nor mean effective pressure can be further increased. Then the only other way to raise the maximum power is to permit higher crank shaft speeds. For this reason it becomes increasingly more important to avoid erratic operation of valves. As a resu ....etc

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Display devices form an important group of devices in the electro industry. With the evolution of high definition TV (HDTV), video conferencing and other advancements in video applications, their importance is increasing. Traditionally cathode ray tubes (CRTs) are used in display devices. But the industry is searching for devices with high resolution and fill ratios that cannot be achieved in CRTs. LCDs can be use an alternative but they are not cost effective. An entirely new type of devices based on Grating Light Valve technology solves all t ....etc

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A gate valve is a valve that opens by lifting a round or rectangular gate out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar. The gate faces can form a wedge shape or they can be parallel. Gate valves are sometimes used for regulating flow, but many are not suited for that purpose, having been designed to be fully opened or closed. When fully open, the typical gate valve has no obstruction in the flow path, resulting in very low friction loss.


Gate valves are cha ....etc

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