A clamp arrangement for retaining a flexible tube (18) during operation of a roller pump (10) for pumping fluid, the clamp arrangement comprising a pair of rotatable bobbins (24A, 24B, 26A, 26B) mounted adjacent to each other. Each bobbin (24A, 24B, 26A, 26B) has a tapered groove (30), formed partially around a cylindrical surface of the bobbin (24A, 24B, 26A, 26B), and counter rotation of the bobbins (24A, 24B, 26A, 26B) clamps the tube 18 between the bobbins (24A, 24B, 26A, 26B) in the tapered grooves (30). The clamp arrangement allows tubes of different shapes and diameters to be securely held without overly deforming the tube.

Provided are a valve device free of changes in the position of the valve member caused by external force and fluid pressure, and a lock device for the valve device. The lock device has a tubular member fitted to the rotating part of the valve device so that the member is movable along the axis of the rotating part in both directions, wherein the member has a protrusion on its inner circumferential face along its axis, and the protrusion engages with or disengages from recesses in an outer circumferential face of a holder of the rotating part formed along its axis when the member moves in either direction; or the member has recesses in its inner circumferential face formed along its axis, and the recesses engage with or disengage from a protrusion on the outer circumferential face of the holder along its axis when the member moves in either direction.

A valve assembly including a valve body with an inlet port and an outlet port, a flow passage and a valve element disposed within the flow passage, an actuator and a lockout mechanism configured to maintain the position of the valve assembly in an opened position or a closed position. The lockout mechanism can include at least one screw.

A valve assembly including a valve body with an inlet port and an outlet port, a flow passage and a valve element disposed within the flow passage, an actuator and a lockout mechanism configured to maintain the position of the valve assembly in an opened position or a closed position. The lockout mechanism can include at least one screw.

Embodiments provide a gate valve including a first body half that defines a first process fluid aperture, a first chest portion, and a first chest gate support recess formed in the first chest portion. A second body half defines a second process fluid aperture that is aligned with the first process fluid aperture, a second chest portion, and a second chest gate support recess that is formed in the second chest portion. A gate is movable relative to the first body half and the second body half. A first chest gate support is received within the first chest gate support recess, and a second chest gate support is received within the second chest gate support recess.

A security cover assembly for limiting access to a utility curb box, including an elongated security screw mounted to a cover member configured to cover a curb box to project down into the curb box and suspend a clamping disc movable up and down in the curb box by rotation in either opposite direction of the security screw by use of a specially configured key. A cutout on the clamping disc perimeter allows the clamping disc to be lowered beneath a conventional fixed flange projecting from a sidewall of the curb box and rotated into alignment therewith to thereafter be clamped thereto upon rotation of the security screw to thereafter prevent rotation of the cover assembly and removal of the cover assembly. Rotation of the cover assembly in the opposite direction to align a cutout in the clamping disc with the flange allows installation and removal of the cover assembly.

There is provided a safety lock for a hose connector and valve on a flow line having an anchor that is in a fixed position relative to the valve, a movable body movably attached to the anchor, and a shroud and an actuator blocking member carried by the movable body. The shroud is sized and positioned on the movable body to limit access to the hose connector when the movable body is in a first position, and to permit access to the hose connector when the movable body is in a second position. The actuator blocking member is sized and positioned on the movable body to prevent the valve actuator from moving from a second to a first position when the movable body is in the second position, and to permit movement of the actuator when the movable body is in the first position.

There is provided a safety lock for a hose connector and valve on a flow line having an anchor that is in a fixed position relative to the valve, a movable body movably attached to the anchor, and a shroud and an actuator blocking member carried by the movable body. The shroud is sized and positioned on the movable body to limit access to the hose connector when the movable body is in a first position, and to permit access to the hose connector when the movable body is in a second position. The actuator blocking member is sized and positioned on the movable body to prevent the valve actuator from moving from a second to a first position when the movable body is in the second position, and to permit movement of the actuator when the movable body is in the first position.

A handle assembly is provided for an outlet valve of a tank car wherein the outlet valve has a valve stem rotatable about an axis and is operative to open and close the outlet valve. The handle assembly includes a valve handle for manually opening the outlet valve, a rotatable shaft coupled to the handle, and a coupling coupled to the outlet valve and selectively coupleable to the shaft. A valve rotation control structure includes a first movement control component on one of the coupling and the shaft. The valve rotation control structure is configured to permit the coupling or shaft to move parallel to the axis of the valve stem between a first locked position and a second rotatable position and to rotate about the axis of the valve stem between a first valve closed position and a second valve open position at the second rotatable position.

A handle assembly is provided for an outlet valve of a tank car wherein the outlet valve has a valve stem rotatable about an axis and is operative to open and close the outlet valve. The handle assembly includes a valve handle for manually opening the outlet valve, a rotatable shaft coupled to the handle, and a coupling coupled to the outlet valve and selectively coupleable to the shaft. A valve rotation control structure includes a first movement control component on one of the coupling and the shaft. The valve rotation control structure is configured to permit the coupling or shaft to move parallel to the axis of the valve stem between a first locked position and a second rotatable position and to rotate about the axis of the valve stem between a first valve closed position and a second valve open position at the second rotatable position.