A pipeline control unit that joins pipeline conduits and has a housing with an interior compartment for receiving a gate. A valve servicing assembly or pressure plates can be installed onto the housing to form a fluid tight structure to allow removal and replacement of a retained gate without depressurizing a pipeline system. Strongbacks attached to the housing can compress lateral walls of the housing to secure a gate in the interior compartment, and removal of such compression allows removal of the gate while the pipeline is pressurized.

A dual-valve, valve core installation/removal tee enable the removal and or replacement of a Schrader valve insert without evacuating the refrigeration system. The use of a dual-valve valve core installation/removal tee also permits the valve core to be removed and maintenance of the HVAC system to be performed without the flow restriction of the valve core and core depressor.

An adapter system for a check valve which comprises a housing open at the bottom and a lateral wall pierced by a hole, and a flap fitted inside the housing and movable between a shut-off position in which the flap shuts off the hole and a free position in which the flap does not shut off the hole. A plug is provided for being inserted into the hole through an end face and a stop is provided for being placed against the lateral wall of the housing opposite the lateral wall pierced by the hole and comprising an attachment device provided for attaching the stop to the housing and provided so that the plug comes to rest against the stop. Such an adapter system may be installed without it being necessary to dismantle the housing.

An adapter system for a check valve which comprises a housing open at the bottom and a lateral wall pierced by a hole, and a flap fitted inside the housing and movable between a shut-off position in which the flap shuts off the hole and a free position in which the flap does not shut off the hole. A plug is provided for being inserted into the hole through an end face and a stop is provided for being placed against the lateral wall of the housing opposite the lateral wall pierced by the hole and comprising an attachment device provided for attaching the stop to the housing and provided so that the plug comes to rest against the stop. Such an adapter system may be installed without it being necessary to dismantle the housing.

A press-fit in situ retrofit assembly for a top entry valve and a method thereof are disclosed. The assembly includes an annular conduit (201) including a segment (202) of reduced outside diameter and a shoulder (203) on the exterior surface at the proximal end (204), and is configured to conform with an interior surface (205) of a valve seat (206) at the distal end (207). A valve body extension (208) with an interior annular region (301), and an inlet port (209) fluidically connected to the annular region (301). A gland packing push plate (211) is configured to allow the annular conduit (201) to pass through thereby forming an outlet port (212). And a thrust plate (403) is attached to the thrust screws (401). The thrust plate (403) allows the segment (202) of reduced outside diameter at the proximal end (204) of the annular conduit (201) to pass through, with the thrust plate (403) seating on the shoulder (203). The assembly and the method allow the removal of a portion of the fluid from the cold box for downstream processing or manipulation as desired.

A press-fit in situ retrofit assembly for a top entry valve and a method thereof are disclosed. The assembly includes an annular conduit (201) including a segment (202) of reduced outside diameter and a shoulder (203) on the exterior surface at the proximal end (204), and is configured to conform with an interior surface (205) of a valve seat (206) at the distal end (207). A valve body extension (208) with an interior annular region (301), and an inlet port (209) fluidically connected to the annular region (301). A gland packing push plate (211) is configured to allow the annular conduit (201) to pass through thereby forming an outlet port (212). And a thrust plate (403) is attached to the thrust screws (401). The thrust plate (403) allows the segment (202) of reduced outside diameter at the proximal end (204) of the annular conduit (201) to pass through, with the thrust plate (403) seating on the shoulder (203). The assembly and the method allow the removal of a portion of the fluid from the cold box for downstream processing or manipulation as desired.

A serviceable valve carousel system may include a valve carousel housing having a first port adapter receiver, a valve service port, and a second port adapter receiver. A rotatable valve carousel may be disposed within the valve carousel housing. The rotatable valve carousel may include a valve lumen and a removable valve cap. A first port adapter may be removably attached to the first port adapter receiver and a second port adapter may removably attached to the second port adapter receiver. The first port adapter and the second port adapter may be of a type or kind needed to facilitate connectivity. The rotatable valve carousel may be rotatable between a first state that allows fluid communication between the first port adapter and the second port adapter through a check valve and a second state that allows the worn check valve to be removed and replaced via the valve service port.

A serviceable valve carousel system may include a valve carousel housing having a first port adapter receiver, a valve service port, and a second port adapter receiver. A rotatable valve carousel may be disposed within the valve carousel housing. The rotatable valve carousel may include a valve lumen and a removable valve cap. A first port adapter may be removably attached to the first port adapter receiver and a second port adapter may removably attached to the second port adapter receiver. The first port adapter and the second port adapter may be of a type or kind needed to facilitate connectivity. The rotatable valve carousel may be rotatable between a first state that allows fluid communication between the first port adapter and the second port adapter through a check valve and a second state that allows the worn check valve to be removed and replaced via the valve service port.

A method for isolating a water valve for repair or replacement includes closing the valve and thereafter replacing an outlet pipe with an adapter pipe. An expandable plug is used to seal the adapter pipe, after which the valve is opened and an air tube having a bladder on an end thereof is inserted through the valve and expanded to seal the inlet pipe. Thereafter, the stem assembly of the valve or the entire valve itself may be removed for simple replacement of the sealing washer or total replacement of the valve. The apparatus for practicing the method, and including the expandable plug, inflatable bladder, and necessary tubing, plug actuator, and air valve are presented.

A method for isolating a water valve for repair or replacement includes closing the valve and thereafter replacing an outlet pipe with an adapter pipe. An expandable plug is used to seal the adapter pipe, after which the valve is opened and an air tube having a bladder on an end thereof is inserted through the valve and expanded to seal the inlet pipe. Thereafter, the stem assembly of the valve or the entire valve itself may be removed for simple replacement of the sealing washer or total replacement of the valve. The apparatus for practicing the method, and including the expandable plug, inflatable bladder, and necessary tubing, plug actuator, and air valve are presented.