Abstract: A retractable fitting with a stopcock has a stopcock housing for connection to a pipe or process chamber. The housing has a connection opening into the pipe or process chamber. A shut-off body is rotatable about a pivot axis relative to the stopcock housing, and has a passage hole that merges in an open state of the stopcock into the connection opening of the stopcock housing, the connection opening being closed by the shut-off body in a closed state. A support element in the passage hole is introduced in the open state through the connection opening into the pipe or process chamber. A plurality of flushing lines are operable to conduct a flushing medium, the plurality of flushing lines being accessible from outside of the stopcock and being connected to and/or opening into the passage hole of the shut-off body at least in the closed state of the stopcock.

Abstract: A retractable fitting with a stopcock has a stopcock housing for connection to a pipe or process chamber. The housing has a connection opening into the pipe or process chamber. A shut-off body is rotatable about a pivot axis relative to the stopcock housing, and has a passage hole that merges in an open state of the stopcock into the connection opening of the stopcock housing, the connection opening being closed by the shut-off body in a closed state. A support element in the passage hole is introduced in the open state through the connection opening into the pipe or process chamber. A plurality of flushing lines are operable to conduct a flushing medium, the plurality of flushing lines being accessible from outside of the stopcock and being connected to and/or opening into the passage hole of the shut-off body at least in the closed state of the stopcock.

Abstract: The invention relates to a device for measuring the differential pressure in a flowing fluid. The invention has a housing having two coaxial openings and an inner space. The inner space can be accessed by at least one of the openings. A measuring nozzle is arranged in the housing and has a flow channel with a cross-sectional constriction, and a differential pressure sensor comprising two measuring inlets for sensing a difference between pressures at the measuring inlets. A first one of the measuring inlets is in connection with the flow channel. A second one of the measuring inlets is in connection outside of the measuring nozzle with the inner space, and with a shut-off body. The shut-off body includes the measuring nozzle and is rotatably mounted in the housing about a rotation axis. The shut-off body, in a first rotational angle position, connects the flow channel to the two openings, and in a second rotational angle position blocks a flow between the two openings.

Abstract: A device for introducing an object into a pipe is disclosed. The device includes a guide that is disposed on a pipe and a positioning unit that is movably guided on the pipe in an introduction direction by means of the guide. The positioning unit that supports a carrier that can be introduced into the pipe by moving the positioning device in the introduction direction. The positioning device is coupled to the pipe with a linear one-way clutch operable in a blocked state when the positioning device is moved against the introduction direction.

Abstract: The invention relates to a device for measuring the differential pressure in a flowing fluid, comprising a housing (3) having two coaxial openings (7, 8) and an inner space (29), which inner space can be accessed by the or the at least one of the openings (7, 8), a measuring nozzle that is arranged in the housing (3) and that has a flow channel (22) comprising a cross-sectional constriction (23), a differential pressure sensor (39) comprising two measuring inlets (40, 42), by means of which differential pressure sensor a difference between pressures at the measuring inlets (40, 42) can be measured, wherein a first of the measuring inlets (40) is in connection with the flow channel (22) and a second of the measuring inlets (42) is in connection outside of the measuring nozzle with the inner space (29), and a shut-off body (12) that comprises the measuring nozzle and that is rotatably mounted in the housing (3) about a rotation axis, which shut-off body in a first rotational angle position connects the flow cha

Abstract: A device for introducing an object into a pipe is disclosed. The device includes a guide that is disposed on a pipe and a positioning unit that is movably guided on the pipe in an introduction direction by means of the guide. The positioning unit that supports a carrier that can be introduced into the pipe by moving the positioning device in the introduction direction. The positioning device is coupled to the pipe with a linear one-way clutch operable in a blocked state when the positioning device is moved against the introduction direction.