Pinch Valve Vs Diaphragm Valve – Which is best?

Here we look at the Pinch Valve vs Butterfly Valve: Soft seated pinch valves are operated by delivering compressed air into the valve’s casing, which results in the compression of the rubber tube to achieve a completely tight seal. This ensures that there is no leakage while the product is flowing through the tube, resulting in a longer service life. There are several types of soft seated valves available in terms of operation including pressure relief, manual, normally closed, and high performance valves, which are designed for a diverse range of operations. The following are the highlighting features of soft seated pinch valves: Minimum friction resistance, non-clogging operation, Light weight design Easy maintenance Simple installation Compact and durable construction 100% tight seal When soft seated valves are compared with any other type of valve, they are seen to be unprecedented in terms of performance and maintenance. Soft seated diaphragm valves comprise of a vertical spring mechanism which pushes a diaphragm down into the body of the valve to stop or release the flow of the media. With the help of a handle, the operator changes the position by turning the spring at proportional requirements. The flow of the media is obstructed when the diaphragm is again pushed downwards using the hand wheel. The problem with soft seated diaphragm valves is that the media doesn’t stop flowing immediately; it takes some time before the flow is completely shut off. This happens because of dead stops created from the build-up of media getting stuck around its diaphragm. A soft seated pinch valve, on the other hand, has a rubber sleeve which works as the opening in the valve body as well as the second pressure boundary. Due to the presence of non-clogging rubber sleeves, coupled with the extremely quick closing time of the valve, the construction and design of a soft seated pinch valve is considered to be more reliable and has a longer service life as compared to soft seated ball valves.