Removable seats for a dual poppet valve

Details Removable seats for a dual poppet valve Removable seats for a dual poppet valve

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 1/44 (2006.01)

Patent

CA 2113182

2113182 9302307 PCTABS00019 In a valve having a housing with a cavity therein with an entrance port connected to a source of fluid and an outlet port connected to a fluid system. The valve has a body with first and second poppet members which control the flow of fluid from the entrance port to the outlet port. An actuation member connected to the body moves the first and second poppets with respect to first and second seats, respectively, to control the flow of fluid from the entrance port to the cavity and correspondingly the flow of fluid to the outlet port. The actuation member sequentially moves the first and second poppets toward the first and second seats, respectively, by initially moving the second poppet into engagement with the second face to partially interrupt the flow of fluid through cavity and thereafter moving the first poppet into engagement with the first face to completely interrupt the flow of fluid through the cavity to the outlet port. The first and second seats each have a cylindrical member located in said cavity with a first end having a flange and a conical surface thereon and a second end that engages the housing, the conical surface defining the contact for the seating of the corresponding first and second poppets on the body. A flexible member located in grooves in the housing engages the cylindrical members of the first and second seats and a locking ring attached to the housing retains the cylindrical members in the housing while compressing the flexible member to form seals between the cylindrical members and the housing. The flexible member allows some dimensional changes to occur in the housing without effecting the sealing to assure that the flow of fluid through the cavity to the outlet port is interrupted when the first and second poppets engage said first and second seats.

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