Abstract: Fluid valves having an integral safety shut-off are described. An example valve assembly includes a body defining a flow path between an inlet and an outlet and opposing seating surfaces. The example valve assembly includes first valve trim including a first valve stem operatively coupled to a first closure member, the first closure member to engage one of the seating surfaces to control fluid flow between the inlet and the outlet during normal operation. The example valve assembly includes second valve trim including a second valve stem operatively coupled to a second closure member, the second closure member to engage the other one of the seating surfaces during a failure condition to restrict fluid flow between the inlet and the outlet. A surface of the second closure member to define a partial wall of the flow path during normal operation such that a profile of the flow path defined by the body and the second closure member is substantially continuous.

Abstract: Fluid valves having an integral safety shut-off are described. An example control valve having opposing seating surfaces includes a first bonnet removably coupled to the control valve. The first bonnet has a first bore receiving a portion of a first valve trim. The first valve trim comprises a first valve stem operatively coupled to a first valve plug or closure member to engage one of the seating surfaces to provide a fluid seal between the first bore and the portion of the first valve trim. Additionally, the control valve includes a second bonnet removably coupled to the control valve. The second bonnet has a second bore receiving a portion of a second valve trim. The second valve trim comprises a second valve stem operatively coupled to a second valve plug or closure member to engage the other one of the seating surfaces to provide a fluid seal between the second bore and the portion of the second valve trim.

Abstract: Fluid valves having an integral safety shut-off are described. An example valve assembly includes a body defining a flow path between an inlet and an outlet and opposing seating surfaces. The example valve assembly includes first valve trim including a first valve stem operatively coupled to a first closure member, the first closure member to engage one of the seating surfaces to control fluid flow between the inlet and the outlet during normal operation. The example valve assembly includes second valve trim including a second valve stem operatively coupled to a second closure member, the second closure member to engage the other one of the seating surfaces during a failure condition to restrict fluid flow between the inlet and the outlet. A surface of the second closure member to define a partial wall of the flow path during normal operation such that a profile of the flow path defined by the body and the second closure member is substantially continuous.

Abstract: Fluid valves having an integral safety shut-off are described. An example bonnet assembly for use with a control valve having opposing seating surfaces includes a first bonnet that is to be removably coupled to the control valve. The first bonnet having a first bore adapted to receive a portion of a first valve trim and further adapted to engage one of the seating surfaces to provide a fluid seal between the first bore and the portion of the first valve trim. Additionally, the second bonnet that is to be removably coupled to the control valve. The second bonnet having a second bore adapted to receive a portion of a second valve trim and further adapted to engage the other one of the seating surfaces to provide a fluid seal between the second bore and the portion of the second valve trim.