The invention relates to a hydraulic proof test assembly comprising at least a valve (1) with parallel seats (102). It comprises: a shut-off member (2) with parallel plates (20, 21), connected by connecting means for regulating their separation, to make them go from a first position in which this separation is sufficient to enable the shut-off member (2) to be introduced into said valve (1) to a second position where said separation is greater, this separation making it possible to apply them firmly against said parallel seats (102); a device (3) for inserting said shut-off member (2) into said valve (1) which comprises at least a “U” shaped tool, configured to be introduced into said valve (1), its parallel arms forming guides, while its base forms a support for retaining said shut-off member (2); a “dummy stem” (4).

The invention relates to a hydraulic proof test assembly comprising at least a valve (1) with parallel seats (102). It comprises: a shut-off member (2) with parallel plates (20, 21), connected by connecting means for regulating their separation, to make them go from a first position in which this separation is sufficient to enable the shut-off member (2) to be introduced into said valve (1) to a second position where said separation is greater, this separation making it possible to apply them firmly against said parallel seats (102); a device (3) for inserting said shut-off member (2) into said valve (1) which comprises at least a “U” shaped tool, configured to be introduced into said valve (1), its parallel arms forming guides, while its base forms a support for retaining said shut-off member (2); a “dummy stem” (4).

The invention relates to a conduit insert (1) comprising an adapter (10) having a liquid inlet (11) and a liquid outlet (12) and between them a chamber (13) having a first planar end wall into which the liquid inlet (11) opens, and an opposite second planar end wall, which is parallel to the first end wall and into which the liquid outlet (12) opens, and an access opening (16) extending from the first planar end wall of the chamber (13) to the second planar end wall of the chamber. A conduit access means (20) is slidable into and extractable out of the chamber (13) via the access opening (16) and has a first planar end face and an opposite second planar end face which is parallel to the first planar end face. The planar end faces are arranged to by means of respective elastic annular seals (27) round the liquid inlet (11) and the liquid outlet (12), respectively, in the chamber (13) to abut tightly against a respective planar end wall, wherein the elastic annular seals are (27) are permanently arranged in annular grooves (29) to enable insertion and extraction of the conduit access means (20) while pressurized liquid flows into the adapter (10) and its chamber (13) via the liquid inlet (11).

The invention relates to a conduit insert (1) comprising an adapter (10) having a liquid inlet (11) and a liquid outlet (12) and between them a chamber (13) having a first planar end wall into which the liquid inlet (11) opens, and an opposite second planar end wall, which is parallel to the first end wall and into which the liquid outlet (12) opens, and an access opening (16) extending from the first planar end wall of the chamber (13) to the second planar end wall of the chamber. A conduit access means (20) is slidable into and extractable out of the chamber (13) via the access opening (16) and has a first planar end face and an opposite second planar end face which is parallel to the first planar end face. The planar end faces are arranged to by means of respective elastic annular seals (27) round the liquid inlet (11) and the liquid outlet (12), respectively, in the chamber (13) to abut tightly against a respective planar end wall, wherein the elastic annular seals are (27) are permanently arranged in annular grooves (29) to enable insertion and extraction of the conduit access means (20) while pressurized liquid flows into the adapter (10) and its chamber (13) via the liquid inlet (11).

A pipe isolation device and method of using the same. The pipe isolation device includes a control bar head, a first sealing head, and a second sealing head. The first sealing head has a first seal element and a first sliding engagement. The first sliding engagement permits the first sealing head to slide relative to the control bar head along a first fixed path and traverse a right angle to gain access to an interior space of a pipe. The second sealing head has a second seal element and a second sliding engagement. The second sliding engagement permits the second sliding head to slide relative to the first sealing head along a second fixed path and traverse the right angle to gain access to an interior space of the pipe. A first seal element and a second seal element are disposed on the sealing heads and have axially-offset configurations.

A pipe isolation device and method of using the same. The pipe isolation device includes a control bar head, a first sealing head, and a second sealing head. The first sealing head has a first seal element and a first sliding engagement. The first sliding engagement permits the first sealing head to slide relative to the control bar head along a first fixed path and traverse a right angle to gain access to an interior space of a pipe. The second sealing head has a second seal element and a second sliding engagement. The second sliding engagement permits the second sliding head to slide relative to the first sealing head along a second fixed path and traverse the right angle to gain access to an interior space of the pipe. A first seal element and a second seal element are disposed on the sealing heads and have axially-offset configurations.

An air vent plug assembler and milker unit short milk tube having an air vent plug assembly to improve milk flow characteristics through the short milk tube. The short milk tube includes a wall with an upstream end and a downstream end and defining a milk passage bore extending between the upstream end and the downstream end. The wall defines a vent plug mounting hole. A vent plug extends through the vent plug mounting hole and includes a cap, a shaft joined to the cap, and a barbed end joined to the shaft, the vent plug defining a vent passage to at least partially vent the milk passage bore. A flow dimple is defined in the barbed end and disposed in the milk passage bore.

An air vent plug assembler and milker unit short milk tube having an air vent plug assembly to improve milk flow characteristics through the short milk tube. The short milk tube includes a wall with an upstream end and a downstream end and defining a milk passage bore extending between the upstream end and the downstream end. The wall defines a vent plug mounting hole. A vent plug extends through the vent plug mounting hole and includes a cap, a shaft joined to the cap, and a barbed end joined to the shaft, the vent plug defining a vent passage to at least partially vent the milk passage bore. A flow dimple is defined in the barbed end and disposed in the milk passage bore.

A pipe stopper assembly includes a stopper fitting defining a fitting channel, the stopper fitting configured to be mounted to a pipeline; and a pipe stopper positioned in the fitting channel and comprising an expandable stopper body and a pressure assembly, the expandable stopper body configurable in an expanded configuration and a contracted configuration, the pressure assembly configurable in an open configuration and a closed configuration; wherein, in the open configuration, the expandable stopper body is biased to the expanded configuration, and in the closed configuration, the expandable stopper body is biased to the contracted configuration; and wherein, in the expanded configuration, fluid is prohibited from flowing through the fitting channel, and in the contracted configuration, fluid is permitted to flow through the fitting channel.

A pipe stopper assembly includes a stopper fitting defining a fitting channel, the stopper fitting configured to be mounted to a pipeline; and a pipe stopper positioned in the fitting channel and comprising an expandable stopper body and a pressure assembly, the expandable stopper body configurable in an expanded configuration and a contracted configuration, the pressure assembly configurable in an open configuration and a closed configuration; wherein, in the open configuration, the expandable stopper body is biased to the expanded configuration, and in the closed configuration, the expandable stopper body is biased to the contracted configuration; and wherein, in the expanded configuration, fluid is prohibited from flowing through the fitting channel, and in the contracted configuration, fluid is permitted to flow through the fitting channel.