A carrier vault for a workstation of a pneumatic tube system includes a rotatable carousel comprising at least a first and second carrier port, each carrier port sized and shaped to hold a carrier used to transport materials via the pneumatic tube system and to allow the carrier to pass through the carousel. The carousel is configured to rotate between a first position, where the first carrier port is aligned with an access tube of the pneumatic tube system and a second position, where the second carrier port is aligned with the access tube. The carrier vault further comprises a selection gate adjacent to the carousel comprising a rotatable plate and a selection gate opening. The selection gate is configured to rotate between an open position, where the carrier is allowed to pass through the plate, and a closed position, where the carrier is prevented from passing through the plate.

A carrier vault for a workstation of a pneumatic tube system includes a rotatable carousel comprising at least a first and second carrier port, each carrier port sized and shaped to hold a carrier used to transport materials via the pneumatic tube system and to allow the carrier to pass through the carousel. The carousel is configured to rotate between a first position, where the first carrier port is aligned with an access tube of the pneumatic tube system and a second position, where the second carrier port is aligned with the access tube. The carrier vault further comprises a selection gate adjacent to the carousel comprising a rotatable plate and a selection gate opening. The selection gate is configured to rotate between an open position, where the carrier is allowed to pass through the plate, and a closed position, where the carrier is prevented from passing through the plate.

A carrier vault for a workstation of a pneumatic tube system includes a rotatable carousel comprising at least a first and second carrier port, each carrier port sized and shaped to hold a carrier used to transport materials via the pneumatic tube system and to allow the carrier to pass through the carousel. The carousel is configured to rotate between a first position, where the first carrier port is aligned with an access tube of the pneumatic tube system and a second position, where the second carrier port is aligned with the access tube. The carrier vault further comprises a selection gate adjacent to the carousel comprising a rotatable plate and a selection gate opening. The selection gate is configured to rotate between an open position, where the carrier is allowed to pass through the plate, and a closed position, where the carrier is prevented from passing through the plate.

Powder feeding device and powder transfer method are disclosed. The powder feeding device includes a container including a container body forming a storage space therein; a hopper including a hopper body forming an accommodation space therein; a chamber unit including a chamber housing forming a hollow portion and coupled to the hopper body; a pipe assembly including a container pipe unit which extends from the container and is opened or closed, a hopper pipe unit which is branched from the container pipe unit, is connected to the hopper body, and is opened or closed, and a chamber pipe unit which is branched from the container pipe unit, is connected to the chamber housing, and is opened or closed; and a valve assembly including a coupling valve which is coupled to at least one of the chamber housing and the hopper body and connects/disconnects the storage space to/from the hollow portion.