- A diaphragm valve is a type of valve that uses a flexible diaphragm to control the flow of fluid.
- The valve consists of a valve body with two or more ports, a flexible diaphragm, and a “weir or saddle” or seat upon which the diaphragm closes the valve
- They are used to start, stop, and control fluid flow. Diaphragm valves use a flexible diaphragm connected to a compressor by a stud which is molded into the diaphragm
- To start or increase flow, the compressor is moved up by the valve stem. To stop or slow flow, the compressor is lowered and the diaphragm is pressed against the bottom of the valve
- They are also known for their leak-proof seal, tight shut-off, easy maintenance, and reduced leakage to the environment