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Class Information
Number: 210/278
Name: Liquid purification or separation > Particulate material type separator, e.g., ion exchange or sand bed > With rehabilitation means > Backwash or blowback means > Flow controller external of closed casing > Multi-way valve unit
Description: Apparatus in which a single valve controls communication with three or more flow lines.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8691091 Aeration control valve system for water treatment system and methods for using same Apr. 8, 2014
8500999 System for water treatment regeneration stage Aug. 6, 2013
8459302 Fluid-directing multiport rotary valve Jun. 11, 2013
8282832 Oil drier regenerator Oct. 9, 2012
8182675 Biological cleaning filter apparatus and system for aqua-culture May. 22, 2012
8147756 Device for carrying out a chemical or physical treatment Apr. 3, 2012
7722772 Ion exchange apparatus and method of controlling the same May. 25, 2010
7549446 Multi-functional flow control valve for water treatment systems Jun. 23, 2009
7491321 Oxidation tank control valve assembly and systems and methods for replenishing a charge of oxygen-containing gas within an oxidation tank Feb. 17, 2009
7468134 See-thru self cleaning biological filter system for aqua-culture Dec. 23, 2008
7364654 In-home water treatment system Apr. 29, 2008
7332080 Apparatus for salt free water softening Feb. 19, 2008
7300569 Water treatment system Nov. 27, 2007
7297256 Pressure gradient dosing system for fluid supply Nov. 20, 2007
7156995 Aeration tank control valve system Jan. 2, 2007
7081200 Swimming pool filter Jul. 25, 2006
6878293 Automatic valve assembly for water circulation systems Apr. 12, 2005
6787042 Automated radionuclide separation system and method Sep. 7, 2004
6776913 Water softening method and apparatus for use therewith Aug. 17, 2004
6709574 Fish pond filter system Mar. 23, 2004
6644349 In-tank water conditioner valve Nov. 11, 2003
6627070 Apparatus for aeration in a water filter system Sep. 30, 2003
6447678 Regeneration of water treatment media Sep. 10, 2002
6413423 Liquid treatment apparatus with backwash flow control valve Jul. 2, 2002
6398954 Multimedia backwashable filtration system Jun. 4, 2002
6293298 Water softener valve Sep. 25, 2001
6254772 Backwashable filtration system Jul. 3, 2001
6245233 Water filtering apparatus with water flow switch valve device Jun. 12, 2001
6238556 Filtration system including a back washable pre-filtration apparatus May. 29, 2001
6231763 Regeneration of water treatment media May. 15, 2001
6103108 Water treatment apparatus Aug. 15, 2000
6056873 Management of a body of water May. 2, 2000
6042729 Regeneration of water treatment media Mar. 28, 2000
6001262 Cascade ion exchange for high purity water production Dec. 14, 1999
5937903 High performance diverter valve Aug. 17, 1999
5891332 Magnetic filtration apparatus for purifying water Apr. 6, 1999
5879559 Valve controller for water conditioning system Mar. 9, 1999
5858219 Cooling tower water treatment system Jan. 12, 1999
5779771 Rotating flow distributor assembly for use in continuously distributing decontamination and regeneration fluid flow Jul. 14, 1998
5744040 Apparatus and method for removing dissolved hydrogen sulfide from water Apr. 28, 1998
5693219 Apparatus for backwashing a water filter Dec. 2, 1997
5628899 Control mechanism for controlling regeneration of two water treatment tanks May. 13, 1997
5597479 Electro-coalescence/magnetic separation (ECMS) system and components for removal of contaminants from water streams, including desalinization Jan. 28, 1997
5505844 Swimming pool backwash filter Apr. 9, 1996
5320750 Water clarifier with first filtrate isolation, improved backwashing and improved bubble generation Jun. 14, 1994
5288399 Gravity flow filter with backwash control chamber Feb. 22, 1994
5256283 Water conditioner system with injector valve Oct. 26, 1993
5212205 Regeneration of deep bed condensate polishers May. 18, 1993
5174337 Water conditioner rotary valve Dec. 29, 1992
5162080 Rotary flow control valve Nov. 10, 1992

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