Raised hardface overlay valve seat

Details Raised hardface overlay valve seat Raised hardface overlay valve seat

F - Mech Eng,Light,Heat,Weapons

16

K

26/162, 251/50

F16K 5/16 (2006.01)

Patent

CA 1265501

ABSTRACT OF THE DISCLOSURE A raised hardface overlay valve seat, fused around the periphery of the port of a valve, having an inverted frustoconical body cavity and an inverted frustoconical plug inserted into said cavity in sealing engagement therewith. A major advantage of the raised hardface overlay seat is that it has a taper conforming to the taper of the plug and as a consequence, reduces the area in contact with the plug and effectively intensifies the sealing stress that can be generated between the plug and the seats by a downward force. The plug may be used with lapping compound to lap the seats, both prior to service and in the field. Sufficient space is allowed in the cavity for a substantial relap life.

571207

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