Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Patent
1995-06-05
1996-08-06
Fox, John C.
Valves and valve actuation
With means to increase head and seat contact pressure
With positive reduction
251188, F16K 514
Patent
active
055426441
ABSTRACT:
An improved plug type valve of the type having seat and reseat retractable seals, the plug assembly having a tapered faceted cylindrical plug with a waterway therethrough. A first pair of shut-off slips is positioned on the plug for axial movement, relative to the plug, wherein the plug surfaces adjacent the shut-off slips are tapered for retracting the shut-off slips as the plug is moved vertically in a first direction relative to the inlet and the outlet of the valve. A pair of thru-bore slips are positioned on the plug adjacent the waterway for relative axial movement therebetween. The plug surfaces adjacent the thru-bore slips are tapered for retracting the thru-bore slips as the plug is moved vertically in a second direction, relative to the inlet and outlet of the valve. The thru-bore slips have a thru-bore aperture to permit flow through the waterway without leakage around the plug and thus the interior of the valve body, when the waterway is aligned with the inlet and outlet.
REFERENCES:
patent: 2612340 (1952-09-01), Laurent
patent: 4623119 (1986-11-01), van der Wiel
Fox John C.
Johnston Pump/General Valve Inc.
Tachner Leonard
LandOfFree
Plug-valve having a plug assembly with retractible seals that ca does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Plug-valve having a plug assembly with retractible seals that ca, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Plug-valve having a plug assembly with retractible seals that ca will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2186584