In gas industries, a butterfly valve is often considered to control the gas flow of a circular disc or vane with the pivotal axis sharp at 90 degrees to the direction of flow. The butterfly valve is actually a quarter turn valve and it is the quarter angle turn which facilitates the gas flow efficiently. […]

Air conditioning is the process wherein the heat and moisture is removed from an occupied space in order to provide comfort to its residents. Air conditioning systems have developed over the past years due to society’s high demand. As a matter of fact, the Department of Energy states that three-quarters of the houses in the United States […]