Bidirectional sleeved/plug ball check valve

An valve for fluid flow control, comprising:

• a body with a first body side and a second body side;
• a main passageway through the body for conducting a fluid through the valve, the main passageway comprising a first passage opening at the first body side and a second passage opening at the second body side;
• a valve plug extending into the valve body and having a plug cavity positioned within the main passageway so that the fluid flowing through the main passageway may flow through the plug cavity;
• the plug cavity having
• a first plug side and a second plug side,
• a first opening on the first plug side through which the fluid may flow to and from the main passageway with respect to the plug cavity,
• a second opening on the second plug side through which the fluid may flow to and from the main passageway with respect to the plug cavity,
• the first plug side opposite the second plug side, and
• an interior valve seat;
• the valve plug selectively rotatable in the body (a) to permit bidirectional fluid flow through the plug cavity and therefore through the valve in a “run” position, (b) to close the valve to the fluid flow in a “closed” position, and (c) to permit bypass fluid flow through the valve in a “bypass” position;
• the valve plug having a ball check movably located within the plug cavity, the ball check movable by action of the fluid flowing through the main passageway into the plug cavity to seat against the valve seat to prevent the fluid flow through the valve;
• the ball check passable through the first opening;
• the plug cavity having a cavity top and a cavity bottom, and
• an upward projection extending from the cavity bottom of the plug cavity into the plug cavity, the upward projection having a projection top, the projection top located below spaced-apart from and not in contact with the cavity top,
• the upward projection located for maintaining the ball check in the plug cavity and preventing the ball check from passing through the first opening and into the main passageway and from exiting the valve body.

A fluid system comprising

• a vessel, a first valve, a second valve, and a sight glass;
• each of the first valve and the second valve comprising
• a body with a first body side and a second body side,
• a main passageway through the body for conducting a fluid through the valve, the main passageway comprising a first passage opening at the first body side and a second passage opening at the second body side,
• a valve plug extending into the valve body and having a plug cavity positioned within the main passageway so that fluid flowing through the main passageway may flow through the plug cavity,
• the plug cavity having
• a first plug side and a second plug side,
• a first opening on the first plug side through which fluid may flow to and from the main passageway with respect to the plug cavity,
• a second opening on the second plug side through which the fluid may flow to and from the main passageway with respect to the plug cavity,
• the first plug side opposite the second plug side, and
• an interior valve seat,
• the valve plug selectively rotatable in the body (a) to permit bidirectional fluid flow through the plug cavity and therefore through the valve in a “run” position, (b) to close the valve to the fluid flow in a “closed” position, and (c) to permit bypass fluid flow through the valve in a “bypass” position, and
• the valve plug having a ball check movably located within the plug cavity, the ball check movable by action of the fluid flowing through the main passageway into the plug cavity to seat against the valve seat to prevent fluid flow through the valve;
• the first valve for controlling fluid flow in a first the fluid flow conduit between the vessel and the sight glass;
• the second valve for controlling fluid flow in a second the fluid flow conduit between the vessel and the sight glass;
• and
• each ball check movable to seat against a corresponding interior valve seat upon breakage of the sight glass to prevent outflow of the fluid from the vessel through the broken sight glass,
• wherein each of the first valve and the second valve comprises
• the ball check passable through the first opening,
• the plug cavity having a cavity top and a cavity bottom,
• an upward projection extending from the cavity bottom of the plug cavity into the plug cavity, the upward projection having a projection top, the projection top located below spaced-apart from and not in contact with the cavity top,
• the upward projection located for maintaining the ball check in the plug cavity and preventing the ball check from passing through the first opening and into the main passageway and from exiting the valve body,
• the ball check has a ball diameter and the upward projection has a projection height, the ball diameter greater than the projection height, and
• the upward projection has a projection diameter, the ball diameter greater than the projection diameter.

A fluid system comprising

• a vessel, a first valve, a second valve, and a sight glass;
• each of the first valve and the second valve comprising
• a body with a first body side and a second body side,
• a main passageway through the body for conducting a fluid through the valve, the main passageway comprising a first passage opening at the first body side and a second passage opening at the second body side,
• a valve plug extending into the valve body and having a plug cavity positioned within the main passageway so that the fluid flowing through the main passageway may flow through the plug cavity,
• the plug cavity having
• a first plug side and a second plug side,
• a first opening on the first plug side through which the fluid may flow to and from the main passageway with respect to the plug cavity,
• a second opening on the second plug side through which the fluid may flow to and from the main passageway with respect to the plug cavity,
• the first plug side opposite the second plug side, and
• an interior valve seat,
• the valve plug selectively rotatable in the body (a) to permit bidirectional fluid flow through the plug cavity and therefore through the valve in a “run” position, (b) to close the valve to the fluid flow in a “closed” position, and (c) to permit bypass fluid flow through the valve in a “bypass” position, and
• the valve plug having a ball check movably located within the plug cavity, the ball check movable by action of the fluid flowing through the main passageway into the plug cavity to seat against the valve seat to prevent the fluid flow through the valve;
• the first valve for controlling the fluid flow in a first fluid flow conduit between the vessel and the sight glass;
• the second valve for controlling the fluid flow in a second fluid flow conduit between the vessel and the sight glass;
• and
• each ball check movable to seat against a corresponding interior valve seat upon breakage of the sight glass to prevent outflow of the fluid from the vessel through the broken sight glass;
• for each of the first valve and the second valve the first opening of the plug cavity is larger than the second opening of the plug cavity and the first opening of the plug cavity is larger than the second opening of the plug cavity;
• each of the first valve and the second valve comprises
• the ball check passable through the first opening,
• the plug cavity having a cavity top and a cavity bottom,
• an upward projection extending from the cavity bottom of the plug cavity into the plug cavity, the upward projection having a projection top, the projection top located below spaced-apart from and not in contact with the cavity top,
• the upward projection located for maintaining the ball check in the plug cavity and preventing the ball check from passing through the first opening and into the main passageway and from exiting the valve body,
• the ball check has a ball diameter and the upward projection has a projection height, the ball diameter greater than the projection height, and
• the upward projection has a projection diameter, the ball diameter greater than the projection diameter.