A method of using a pipe stopper to stop fluid flow through a pipeline includes providing the pipe stopper, the pipe stopper 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 and comprising a housing cavity; lowering the expandable stopper body of the pipe stopper into a pipe channel of the pipeline in the contracted configuration; orienting the pressure assembly in the open configuration, wherein an upper portion of the housing cavity is in fluid communication with an atmosphere external to the pipeline and a lower portion of the housing cavity is in fluid communication with the pipe channel; and biasing the expandable stopper body to the expanded configuration to block fluid flow through the pipe channel.

An installment method of a fluid control body and a fluid control device including a fluid control body with which processes of designing, manufacturing, and managing the fluid control body are simplified to suppress cost of manufacturing, etc, includes a cut-off step of cutting off part of a fluid pipe inside a casing, and an installment step of installing the fluid control body including an on-off valve formed by a valve seat body and a valve element, and a partition body formed by a wall portion, a lid portion, and a seal component, inside the casing in a sealed manner in a state where an operation shaft of the on-off valve is placed in a direction different from the vertical direction.

An installment method of a fluid control body and a fluid control device including a fluid control body with which processes of designing, manufacturing, and managing the fluid control body are simplified to suppress cost of manufacturing, etc, includes a cut-off step of cutting off part of a fluid pipe inside a casing, and an installment step of installing the fluid control body including an on-off valve formed by a valve seat body and a valve element, and a partition body formed by a wall portion, a lid portion, and a seal component, inside the casing in a sealed manner in a state where an operation shaft of the on-off valve is placed in a direction different from the vertical direction.

Some fluid coupling devices described herein are configured for use in fluid systems. For example, some embodiments described in this document are single-use, aseptic fluid coupling devices that can be coupled to create a sterile flow path therethrough. Some such aseptic couplings are genderless couplings such that two identical aseptic couplings can be coupled together.

Some fluid coupling devices described herein are configured for use in fluid systems. For example, some embodiments described in this document are single-use, aseptic fluid coupling devices that can be coupled to create a sterile flow path therethrough. Some such aseptic couplings are genderless couplings such that two identical aseptic couplings can be coupled together.

A fluid control device has a partition body formed by a wall portion that is provided with a through hole communicating with an opening portion in a valve seat, the wall portion being mounted on the valve seat body in a sealed manner, and a lid portion which is provided continuously to the wall portion, the lid portion covering an opening side of the casing, the partition body including a seal component that seals a gap between an inner surface of a casing and the partition body.

A fluid control device has a partition body formed by a wall portion that is provided with a through hole communicating with an opening portion in a valve seat, the wall portion being mounted on the valve seat body in a sealed manner, and a lid portion which is provided continuously to the wall portion, the lid portion covering an opening side of the casing, the partition body including a seal component that seals a gap between an inner surface of a casing and the partition body.

A valve gate may include a threaded rod, a nut engaged with the threaded rod, a movable body mounted on the threaded rod, a seal, a pair of levers, and first and second housing components that at least partially enclose the other components. The threaded rod can be turned to drive translation of the nut and the movable body along the threaded rod. Translation of the movable body along the threaded rod can drive rotation of the levers outward away from the threaded rod, and rotation of the levers can force the seal to expand outward from the threaded rod. Such expansion can force the seal into engagement with an inner surface of a pipeline.

A valve gate may include a threaded rod, a nut engaged with the threaded rod, a movable body mounted on the threaded rod, a seal, a pair of levers, and first and second housing components that at least partially enclose the other components. The threaded rod can be turned to drive translation of the nut and the movable body along the threaded rod. Translation of the movable body along the threaded rod can drive rotation of the levers outward away from the threaded rod, and rotation of the levers can force the seal to expand outward from the threaded rod. Such expansion can force the seal into engagement with an inner surface of a pipeline.

Embodiments of a plugging tool (10) of this disclosure a control bar head (20) and at least one sealing head (30, 40) pivotally connected to the control bar head, the control bar head including a stress suppressor (50) located at a lower end (25) of the control bar head, the stress suppressor including an elastomeric element (51). The stress suppressor can act as a dual-stage suppressor, there being a primary (first stage) and a secondary (second stage) stress suppressor or zone (50A, 50B). The primary stress suppressor has an arched-shaped lowermost end (58) located between a pair of spaced-apart feet (21) of the control bar head, the feet having lateral edges (23) and comprising the secondary stress suppressor. During rotation of the tool into the pipe, stress to the pipe is reduced in a range of 5X to 14X relative to a plugging tool without the stress suppressor.