A valve, in the basic sense, is a device used to start the movement of any kind of substances, whether gases, liquefied solids to any types of liquids. This apparatus controls the movement of the above-mentioned elements by opening, slightly blocking or completely closing various passageways. This type of device is useful in different applications, which include home use, military, business, transportation and the industrial setting. Valves are utilized in two different means; that is either by using pressure when used in the steam engine's safety control, or it can work within a regulated manner, like when valves have a chief role in the cycle control of a machine's engine such as when it is being run by a camshaft.

There are many different types of valves that are used in various ways. The butterfly valve is a commonly used valve. This valve is especially made for use in broad pipes. It is a disk revolving on a perpendicular axis inside the pipe and also functions as a damper or a control valve. This valve is an apparatus that regulates movement especially used in controlling a particular liquid that would run through a specific part of the pipe.

A valve such as this operates the same as a ball valve . This valve contains a flat round plate that is placed in the middle of the pipe, as well as the plate has a bar inside that is joined to a switch in the outer valve portion. This type of valve functions by revolving the handle as well as the plate in similar position or vertical to the movement. Unlike the ball valve type, the butterfly valve is constantly present in the movement; thus there is always a moderate drop in the pressure in the movement regardless of the valve's position.

There are three kinds of this valve. There is a valve that is high in performance, which is reliable in functioning under higher pressure that can withstand as high as 725 PSI and temperature applications. Next is the resilient valve, it has an elastic rubber seat and could work up to the pressure of 232 PSI. Lastly, the tricentric valve that is commonly adorned with a seating made of metal and it can function up to the pressure of 1450 PSI.

Likewise, there are other types of these valves that are available today, and that would be the lug style and the wafer style. The most popular would be thewafer type butterfly valve. This type would be under the plastic valve. In contrast, lug designed valves contain in them inserts made of metal, which are situated in the valve's bolt holes. The inserts are then eased into each end and through this method they would be permitted in a certain system using only dual bolts and without nuts.

Butterfly valves are definitely useful. These seal the pipes, protecting them against impairment as well as being an energy saver. An instance would be on cold months, these lock in heat allowing liquid in the pipes to flow freely. These could also regulate the pressure level inside tubes and pipes. These also endure high levels of oil and corrosive properties of salt, a factor that makes these valuable aboard ships.