Diaphragm valves are a type of valve commonly used in the chemical and pharmaceutical industries due to their ability to handle corrosive and viscous fluids. The valve works by using a flexible diaphragm made of rubber or plastic to control the flow of fluids through the valve.

One of the key advantages of using a diaphragm valve is that it has a low fluid resistance, which allows for a smooth and consistent flow of fluids. This is important in applications where the pressure drop across the valve needs to be minimized in order to prevent damage to the equipment or to maintain the quality of the fluid being transported.

In addition to their low fluid resistance, diaphragm valves are also highly resistant to corrosion, making them ideal for use with harsh chemicals and other corrosive substances. Due to the flexible diaphragm, the valve is able to work effectively even in applications where the fluid is highly viscous, which can be a problem with other types of valves.

Overall, the use of diaphragm valves is an important tool for industries that must deal with corrosive and viscous fluids. Their low fluid resistance and resistance to corrosion make them a reliable and efficient option for fluid control applications.