Butterfly Valve Selection Guide

There are two main styles or designs of a butterfly valve: the wafer and the lug. Aside from these two, there are also different types of valve according to its structure: the concentric, double eccentric, and triple eccentric type.

The appearance of a butterfly valve lives true to its name, it looks like a butterfly. Technically, it has a rotating disk mounted on a rod, and this rod runs through the center of the disk, making it look like the body of a butterfly with the half of the disk on each side as the wings. It may have gotten its name from a pretty and wimpy insect, but this butterfly has the power to act as a medium in controlling the flow of certain substances. Due to it being very much resistant in nature, it can with stand a great deal of pressure which makes it perfect as a device in isolating or regulating a flow, making it a high performance valve.

butterfly valve selection guide

This butterfly comes in different assortments, depending on the usage and need. In the structure of these valves, there are two main styles or designs: the wafer and the lug.

When a valve is either classified as wafer or lug, there are still three types that would further separate each other. Aside from these two, there are also different types of valve according to its structure. The three types are, namely: the concentric, double eccentric, and triple eccentric type.

concentric butterfly valvedouble eccentric butterfly valvetriple eccentric butterfly valve

Whichever type of butterfly valve a person buys, it would still serve its primary purpose of being a flow control valve. Even if a person buys the most expensive one on the market, proper installation is always a must and an incorrect valve set up would render the valve itself unfit for the use it was intended for (you can know more this at how to maintain a butterfly valve article).