Patent ID: 6447678
Filing Date: 2002-09-10
Classification: B01D,C02F,Y10T

Abstract:
A unit including a rotatable valve comprising;a substantially disc shaped valve plate, a face on one side of the disc shaped valve plate having openings in said face, and a plurality of passages extending into said plate from said openings in said face, with at least some of said passages extending through the thickness of said valve plate to communicate with the side of said plate opposite the face, said disc shaped valve plate being rotatable about an axis which extends at a substantial angle to said face; and a valve housing having a face adjacent said valve plate face, said valve housing also having a plurality of passages therein and opening to said valve housing face, first of at least one of said valve housing passages communicating with a supply of fluid, second of at least one of said valve housing passages communicating with a discharge for said fluid from said valve housing, and third of at least one of said valve housing passages communicating with a drain from said valve housing; said valve plate being rotatable about its said axis between a first position in which the fluid is supplied from said first of at least one of said valve housing passages to one of the passages through the valve plate, and from another of the passages through the valve plate to said second of at least one of said valve housing passages communicating with the discharge from said valve housing, and a second position in which the fluid is supplied from another of said valve housing passages to another of the passages through-the valve plate, and from another of the passages through the valve plate to said third of at least one of said valve housing passages communicating with the drain from said valve housing, and said valve plate is also rotatable to at least one or more additional positions which include a rinse position in which fluid passes from the fluid supply and thereafter to the drain, or a bypass position in which fluid passes from the fluid supply through the valve plate and to a fluid discharge from the valve housing.