초록 ▼

A check valve having a removable seat portion with integral flapper (valving means) is disclosed. The seat portion can be removed through a port in the valve body without breaking any connection of the valve body to the associated fluid flow lines. The seat portion can comprise two sections that sec

A check valve having a removable seat portion with integral flapper (valving means) is disclosed. The seat portion can be removed through a port in the valve body without breaking any connection of the valve body to the associated fluid flow lines. The seat portion can comprise two sections that secure between them sealing means (e.g., an O-ring) for creating a fluid tight seal when the valving member of the check valve is closed against the seat portion. A fluid tight seal is created between the valve seat portion and valve body by tapers on the valve seat that cam against corresponding recesses of the valve body to force the valve seat portion against the valve body.

대표청구항 ▼

A removable valve seat for a check valve that has a pivotably mounted valving member movable between open and closed positions, the check valve comprising a check valve body and a valve seat having a first section and a second section, which sections are separable from one another and from the check

A removable valve seat for a check valve that has a pivotably mounted valving member movable between open and closed positions, the check valve comprising a check valve body and a valve seat having a first section and a second section, which sections are separable from one another and from the check valve body but which sections are normally attached to one another and to the check valve body, the check valve body and each section having a bore for the flow of fluid therethrough; a portion of the first section normally being next to a portion of the check valve body, a portion of the second section normally being next to a portion of the first section, a portion of the valving member being rotatably connected to a portion of the second section, and the bores of the check valve body, first section, and second section being aligned when the check valve is in fluid-flow operative condition; the first section having a circumferential lip around the bore, the lip having an outer annular face generally parallel to the axis of the bore; the bore of the second section being of greater diameter than the diameter of the outer annular face of the lip of the first section and having an inner face generally parallel to the axis of the bore; said inner and outer faces of the first and second sections being spaced sufficiently from one another and one or both faces being bevelled to contain and wedge between them sealing means that contacts the valving member when the valving member is in a closed position to effect a fluid-tight seal between the valving member and the valve seat.