The brief introduction to Wafer And Lug Type Butterfly Valve

Butterfly Valves of the Wafer and Lug Type have been around for a long time and are used in a variety of applications. They first appeared in the 1930s and have been used by a variety of industries ever since. The name "butterfly valve" comes from the functionality of its disc, which is often made of cast iron. There are several types of butterfly valves, but they are divided into two categories: wafer and lug type butterfly valves.

The function of a wafer butterfly valve is to maintain a seal in the flow of fluid to protect against dual-directional pressure differentials. In other words, the wafer version of butterfly valves was designed to maintain a tight seal while protecting against bi-directional pressure differentials in order to prevent backflow in systems designed for unidirectional flow. This is accomplished by using a tightly fitted seal, such as an O-ring or precision machined gasket, as well as a flat valve face on the valve's downstream and upstream sections.