What is a butterfly?

The butterfly valve is from a family of valves called a quarter turn valves. The "butterfly" is a metal disk mounted on the rod. When the valve is closed, the disk turns to completely block the passage. When the valve is open, the disk turns a quarter turn, leaving unlimited passage. The disk position is made of the outer valve. A durable version that uses rubber flexibility has the lowest pressure rating. The high -performance version, which is used in slightly higher pressure systems, has a slight shift in the way of the disk, which increases the capacity of the valve seal and reduces its tendency to wear. The valve best for high -pressure systems is a tricentric butterfly valve that uses a metal seat and is therefore able to withstand more pressure.

Butterfly valves are used in many aspects of our lives. One of the most common examples is the carburetor of the car. In a carburented car, a "gas" pedal actually operates a valve of this type that controls the VZ inletThe spirit of the engine. When the driver suppresses the accelerator to the floor, the valve opens all the way as described above to allow the air to go freely into the carburetor. The carburetor then allows air and enough gas to maintain the correct air fuel ratio to pass the intake valves into the combustion chambers where it is ignited by the engine.

Butterfly can also be partially open. When the car is idle, the valve is open only slightly, which allows you to pass enough air to maintain the speed of inactivity. When the accelerator is a little pressed, the valve opens a little further and so on.