Valves of the world

A butterfly valve by a valve to the so-called fourth valve. "Butterfly" is a metal rod installed on disk. When the valve closed, the CD-ROM is open, so that it can completely block access. When the valve is open, the CD-ROM is the fourth rotation, thus enabling it to allow unrestricted through. The position of the CD-ROM is the impact outside the valve.

There are different kinds of butterfly valves, each adapted to different pressures and different use. Flexible butterfly valve, which uses the flexibility of rubber, with the lowest pressure evaluation. High-performance butterfly valve for the pressure slightly higher in the system, functions somewhat offset by the way in the location on the disc, thereby increasing the valve seal capacity and reduce its tendency to wear. The most suitable for high-pressure valve system is tricentric butterfly valve, which makes use of a metal seat, able to withstand greater pressure.

Butterfly valves is used in many aspects of our life. One of the most common example of a butterfly valve in the carburetor of the vehicle. In a carbureted cars, "gas" pedal, in fact, operating butterfly valve control engine air intakes. When the driver inhibit gas pedal all the way to the floor, Butterfly valve open all the way, as mentioned above, free access to air through the carburetor. Carburetor, and then let the air, and enough natural gas to maintain the proper air-fuel ratio, through the inlet valve into the combustion chamber, which is ignited engines.

A butterfly valve can also be partially open. When a car is idle, open the valve, only slightly, just enough to allow air to maintain idling. When the pressure on the gas pedal, a small butterfly valve to open further, and so on.

A ball valve, a type of one-quarter turn valves, is quite literally a ball placed in a passage through the fluid flow. The ball has a hole through it, which open and close the valve. When the ball's location, so that the hole running the same direction as a channel, just fluid flowing through holes in the valve is open. However, when the ball's location, so that the hole is vertical channels, fluid can not be passed, and valves closed. The ball is from external control valve, and treatment is often 90 degrees, or at the turn of the first quarter, back and open and close the valve.

Basic ball valve, as mentioned above, is a two-way valve. This ball valves have a single, direct access, drilling through the ball, so that the two openings: one, on each side, into a socket. A ball valve can also become a three-way valve, if the third hole was bored through part of the ball until it meets the main hole, the formation of a spoon, three-way valve can close one or all of the three channels, which connect .

As in nature, ball valve, this does not work and the circumstances under which the fine control valve is necessary, such as control of the throttle valve, in a car. However, the valve works very well in the circumstances under which the flow needs to completely shut down, such as shut-off valve on the main supply line, in your house. Valve did not tend to development issues, if they are not used for a very long time, they will still work again when absolutely necessary.

There are three different types of ball valve. A full port ball valve to provide any traffic restrictions, which means that when the valve is open, free flow of liquid through it. To achieve this goal, passed the ball more than size, so that the holes bored through it the same size can be passed. A standard port ball valve is not large, so the hole is a size smaller than channel. This small number of restrictions on the movement of fluid through the valve. Reduction of port ball valve, on the other hand, there is a smaller ball and a smaller hole, creating a huge traffic restrictions, fluid through the valve.