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Class Information
Number: 137/246.12
Name: Fluid handling > With cleaner, lubrication added to fluid or liquid sealing at valve interface > Liquid supplied at valve interface > Line pressure feed
Description: Valves wherein line pressure is used to feed the sealing liquid.

Patents under this class:

Patent Number Title Of Patent Date Issued
7857004 Automated condensate drain line cleaning system, method, and kit Dec. 28, 2010
5901737 Rotary valve having a fluid bearing May. 11, 1999
4971098 Valve and improved seat seal therefor Nov. 20, 1990
4702269 By-pass valve Oct. 27, 1987
4450854 Lubricated split plug valve May. 29, 1984
4398559 Valve member and assembly with inlet and outlet pressure relief grooves Aug. 16, 1983
4393893 Lubricated split plug valve Jul. 19, 1983
4372338 High pressure valve assembly Feb. 8, 1983
4363465 Extreme temperature, high pressure balanced, rising stem gate valve with super preloaded, stacked, solid lubricated, metal-to-metal seal Dec. 14, 1982
4350179 Valve assembly with relief groove Sep. 21, 1982
4262689 Respirator valve Apr. 21, 1981
4197924 Ball valve lubricating apparatus Apr. 15, 1980
4029294 High pressure valve Jun. 14, 1977

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