The double flanged butterfly valves with eccentric disc are applied in the pipelines as shut off device and as regulation valves, thanks to the gear box that can stop the disc in many intermediate positions. These double flanged butterfly valves would allow the perfect exchange with regular flat body gate valves, whenever needed. The double flanged butterfly valves can stand both directions of fluid; gasket seals are on the disc and can be replaced without dismantling the valves from the pipeline. You can also install double flanged butterfly valves with double eccentric disc in drinking water plants, being painted with epoxy powder. The gear box is perfect for electric actuator and the installation is easy.
Also, most butterfly valves have been designed to provide a cost effective solution to your flow control and product shut-off requirements. It is available in various sizes ranging from 2cm to 10cm bore which is the standard size. It is ideal for high density liquids as well as slurries they are robust in construction and are available in a number of flange mounting types, materials as well as actuator options. This version is also suitable for flange mounting.
There are various materials which are used for the construction of the body, disc and liners, some of them include: stainless steel, carbon steel, ductile iron, silicone, natural rubber etc.
There are two major seal design for this valve and they include double flanges or wafer lugged body option; metal to metal and soft seated with wafer. Also, there is a great throttling attribute with high tendency of controlling fluid flow; it also offers an inherently higher range ability.