Abstract: A sensing apparatus measures the disk tilt angle of a swing or tilting disk check valve without requiring penetration of the valve housing through a rotating shaft seal. A hinge pin extension is rotationally coupled to the valve disk, and a mechanical converter converts rotation thereof into translation of a magnet carrier within a non-magnetic extension of the valve housing. An LVDT core magnet is translated by the magnet carrier within the housing extension while surrounded by LVDT sensor coils mounted to the exterior of the housing extension. The LVDT core magnet and sensor coils thereby provide an LVDT output signal that indicates the tip angle of the valve disk. Embodiments include threaded coupling of the hinge pin extension to the magnet carrier, or coupling therebetween by a converter pin fixed to one of them into angled helical slot of a cylinder fixed to the other of them.

Abstract: Valve stem packing assemblies may include at least one end ring and at least one sealing ring. The at least one end ring may include an inner ring and an outer ring. Valves include a valve body, a valve stem, and a valve stem packing assembly.

Abstract: A sensing apparatus measures the disk tilt angle of a swing or tilting disk check valve without requiring penetration of the valve housing through a rotating shaft seal. A hinge pin extension is rotationally coupled to the valve disk, and a mechanical converter converts rotation thereof into translation of a magnet carrier within a non-magnetic extension of the valve housing. An LVDT core magnet is translated by the magnet carrier within the housing extension while surrounded by LVDT sensor coils mounted to the exterior of the housing extension. The LVDT core magnet and sensor coils thereby provide an LVDT output signal that indicates the tip angle of the valve disk. Embodiments include threaded coupling of the hinge pin extension to the magnet carrier, or coupling therebetween by a converter pin fixed to one of them into angled helical slot of a cylinder fixed to the other of them.

Abstract: Valve stem packing assemblies may include at least one end ring and at least one sealing ring. The at least one end ring may include an inner ring and an outer ring. Valves include a valve body, a valve stem, and a valve stem packing assembly.

Abstract: Valve stem packing assemblies may include at least one end ring and at least one sealing ring. The at least one end ring may include an inner ring and an outer ring. Valves include a valve body, a valve stem, and a valve stem packing assembly.

Abstract: Valve stem packing assemblies may include at least one end ring and at least one sealing ring. The at least one end ring may include an inner ring and an outer ring. Valves include a valve body, a valve stem, and a valve stem packing assembly.

Abstract: A parallel slide gate valve includes a valve body comprising an interior surface, and an obturator therein. A portion of the interior surface defines a groove having a longitudinal axis oriented substantially perpendicular to a direction of flow through the valve body. The groove has a first width at a first end proximate to the fluid flow path and a second width at a second end distal from the fluid flow path, the second width smaller than the first width. The obturator is at least partially within the at least one groove. The obturator is configured to translate from the first end of the at least one groove toward the second end of the at least one groove as the obturator moves from a closed position to an open position.

Abstract: A parallel slide gate valve includes a valve body comprising an interior surface, and an obturator therein. A portion of the interior surface defines a groove having a longitudinal axis oriented substantially perpendicular to a direction of flow through the valve body. The groove has a first width at a first end proximate to the fluid flow path and a second width at a second end distal from the fluid flow path, the second width smaller than the first width. The obturator is at least partially within the at least one groove. The obturator is configured to translate from the first end of the at least one groove toward the second end of the at least one groove as the obturator moves from a closed position to an open position.

Abstract: A check valve is comprised of a body having inlet and outlet passages and a cylindrical chamber within the body, the axis of which forms an angle with the axis of the inlet and outlet passages. An orifice plate in the cylindrical chamber divides the chamber into a dashpot chamber and a valve chamber which is in communication with the inlet and outlet passages. A valve seat in the valve chamber separates the inlet and outlet passages. A valve closure element is mounted for reciprocation in the valve chamber between a valve open position and a valve closed position where an element is seated upon the seat. A piston is mounted for reciprocation in the dashpot chamber. A piston rod extends through an opening in the orifice plate and connects the closure element and the piston. Means are provided to apply the pressure in the outlet passage to the piston to urge the piston and closure element toward valve closed position.