Diaphragm valves are engineered for tough work environments in the chemical processing, water treatment, pollution control, food and beverage, mining, pharmaceutical, pulp and paper, power generation industries. Diaphragm valves are available in two basic forms: weir type and straight through types. The weir design is best for general use applications or for tough corrosive and abrasive services. The straight through type can be used in situations where the flow direction changes within the system.
They are excellent for use with sludge, slurries and other viscous fluids. Both styles provide a streamlined path for fluid flow that yields minimal pressure drop across the valve. Diaphragm valves (or membrane valves) consists of a valve body with two or more ports, a diaphragm, and a “saddle” or seat upon which the diaphragm closes the valve. The valve is constructed from either plastic or steel.