A flow control device, having: a flow tube extending between upstream and downstream, and a neck region between the first and second ends, wherein the flow tube includes: a wall defining an outer boundary and extending longitudinally from a first end to a second end and transversely from a first side to a second side, wherein: the wall is nonmetal; the wall defines: a first segment extending longitudinally between the first and second ends and transversely from the first side to a segment junction; and a second segment extending longitudinally between the first and second ends and transversely from the second side to the segment junction; and the first segment has a first coefficient of thermal expansion (CTE) and the second segment has a second CTE that differs from the first CTE, to define a transverse CTE gradient.

A control valve includes a tube housing, a tube within the tube housing, and a clamp within the tube housing. The tube is disposed between a first portion of the tube housing and the clamp, and the clamp is movable between an open position and a closed position. The clamp in the open position is located away from the first portion of the tube housing, and the clamp in the first closed position is located adjacent to the first portion of the tube housing.

The present disclosure relates to a valve assembly for controlling fluid flow in a channel, which extends along a longitudinal proximodistal central axis (C.sub.A). The valve assembly comprises a switch, a deformable tube enclosing the channel, and a sphere arranged within the tube between a distal channel portion and a proximal channel portion of the channel. When the tube is in a non-deformed resting state, the valve assembly is in a closed state, and the sphere is in direct contact with said tube, forming a fluid seal with the tube, and when a force is applied to the switch the tube is in a deformed non-resting state and the valve assembly is in an open state, whereby fluids are allowed pass the sphere. The present disclosure further relates to a biopsy syringe comprising the valve assembly.

There is provided a gas supply apparatus that can effectively suppress a trouble caused by backflow of a process gas to the upstream side when processing is performed by using the process gas inside a chamber. The gas supply apparatus supplies gas to a processing chamber in which a sample is processed. The gas supply apparatus includes: ports respectively connected to gas sources of a plurality of types of gases containing a purging gas and a processing gas; and a collective pipe in which the plurality of types of gases supplied from the ports are joined and flowed. A gas flow path through which gas supplied from the port connected to the gas source for the purging gas flows is formed on an uppermost stream side of the collective pipe.

There is provided a gas supply apparatus that can effectively suppress a trouble caused by backflow of a process gas to the upstream side when processing is performed by using the process gas inside a chamber. The gas supply apparatus supplies gas to a processing chamber in which a sample is processed. The gas supply apparatus includes: ports respectively connected to gas sources of a plurality of types of gases containing a purging gas and a processing gas; and a collective pipe in which the plurality of types of gases supplied from the ports are joined and flowed. A gas flow path through which gas supplied from the port connected to the gas source for the purging gas flows is formed on an uppermost stream side of the collective pipe.