Vaas industries pvt ltd manufactures knife gate valves. Knife gate valves basically features a design that ensures minimum contact between moving parts of the valve. The seating itself is accomplished with a non-sliding motion aided by jams located in the body. In handling abrasive media, deflection cones are generally used in order to avail direct impingement of the media on the seat surfaces; hard facing of seating parts is also sometimes used which involves stelliting of the set or gate or complete nitriding of body and gate. Another feature is the purge connection which let in suitable fluid> At pressures higher than line pressure to clean seating surfaces [body purges] and packing area [chest purges]. Knife gate valves ai1 excellent hopper isolation valves with their ability to cut through flowing powders and close by dislodging any material in the seating area. This is also perhaps the only valve design, which can tolerate differential thermal expansion of its parts without affecting its functions, thus making an ideal choice for handling high temperature media. Knife gate valves are generally unidirectional valves; however, modified designs are also available to handle bi-directional shut-off requirements. V aas offers a wide choice in designs and options in their knife gate valve range.
