Air-operated diaphragm valves are a type of power operated valve, available in either 2, 3 or 4-way versions. These diaphragm operated valves use air pressure to produce linear or circular movements to operate the valve. Two-way air actuated diaphragm valves can be either normally closed or normally open, depending on the requirements of each application.
Commonly used in process and industrial applications, a pneumatic operated diaphragm valve is a simple device that employs the use of a rubber diaphragm to open and close against a hard seat, providing the seal. In an air-operated diaphragm valve, the seat is often described as a ‘saddle’ or ‘weir’ and when open, the process media flows freely over the saddle with a minimum pressure drop.
A diaphragm operated valve can also be known as a membrane valve and are particularly suited to applications involving viscous or abrasive media thanks to the inner design of the valve body.
Commonly, the seal materials of pneumatic operated diaphragm valves are formed from either TPE or NBR elastomers, which can be used with media including neutral gas and liquids or contaminated process fluids.
Air actuated diaphragm valve body materials include brass, aluminium, stainless steel and cast iron, all of which are robust and resistant to harsh media.
Air operated diaphragm valves can be used in hygienic or sanitary applications, providing they are configured with appropriate materials. Air actuated diaphragm valves are controlled either by a compressed air supply, or they are often electronically controlled using a 3/2 pilot valve.
As leading suppliers of air operated valves, MGA Controls Ltd are partners with leading diaphragm operated valve manufacturers, such as IMI Buschjost and Bürkert. Both manufacturers produce high quality, robust and reliable air actuated diaphragm valve solutions, for a wide range of industries and applications.
Our technical team are on hand to offer any information regarding our range of air operated diaphragm valves. We would be happy to hear from you on +44 (0)1704 898980 or email [email protected].