A manway gate assembly couples to a tank and provides a liquid tight seal. The manway gate assembly includes a gate selectively slideable in a first linear direction between an open position, a closed position, and/or an intermediate position between the open position and the closed position. The manway gate assembly includes one or more locking members arranged adjacent to the gate and moveable between a locked position and an un-locked position. When in the locked position, the one or more locking members apply a biasing force to the gate in a second linear direction perpendicular to the first linear direction to seal the gate to the tank and provide a liquid tight seal.

There is described a powder isolating valve which is capable of sealing valves from powder leakage during transport of powder and/or granular material. The valve comprises a rotatable valve closure member (14) and a pneumatically activated sealing mechanism containing a pair of resiliently deformable structures (18,20) extending around a surface of the rotatable valve closure member when the latter is in its closed position, the pair of resiliently deformable structures being held in a pair of annular recesses (32,34) which also extend around an surface of the rotatable valve closure member in its closed position, wherein the pair of resiliently deformable structures are capable of being pneumatically activated to force a sealing ring (26) against the rotatable valve closure member.

A storage tank isolation system for a storage tank includes a vertical riser attached to a top of the storage tank and having a cover with an aperture and a connecting member extending from a side of the vertical riser. A distal end of the connecting member is parallel to the top of the storage tank and attached to a storage hatch. The storage tank isolation system includes a valve assembly, which includes a stem extending through the aperture in the cover, a valve plate attached to the stem, and a valve seat sealed to the vertical riser at a position below a connection to the connecting member. The valve plate is moves with the stem from an open position in which the valve plate is held within the vertical riser at a position equal to or above the connection to the connecting member and a closed position.

A storage tank hatch isolation system for a storage tank having a vertical riser attached to a top of the storage tank and having a cover with an aperture, a connecting member extending from a side of the vertical riser, a distal end of the connecting member being attached to a tank hatch, and a valve assembly assessable through the aperture in the cover, the valve assembly configured to be moved from an open position in which flow through the vertical riser to the connecting member is not obstructed, and a closed position in which flow through the vertical riser to the connecting member is obstructed.

A container with improved sealing, for improved security in the event of loading, transporting and/or unloading submicron particles, in particular nanopowder/nanoparticles, includes a connector for injecting liquid and/or gas. Such a container can also contain at least one inflatable seal (40) valve (3; 4). The container is provided with elements for changing the physical state of the material by heating, mixing or ultrasound bombardment. A method for using the container and an inflatable seal valve are also described.

A replaceable liner is for use with a storage tank hatch having a rim adapted to engage with a gasket within a cover and a neck extending vertically downward from the rim to define an aperture that provides access to an inside of the storage tank. The replaceable liner has a body having a rim-facing surface having a vertical cross sectional shape that conforms to a vertical cross sectional shape of the rim and a horizontal cross sectional shape that conforms to a perimeter of the rim, and a gasket facing surface opposite the rim facing surface. Sealant is provided along the rim facing surface of the body, the rim facing surface of the body adapted to engage the rim in a vapor-tight seal, and the gasket facing surface adapted to engage the gasket in a vapor-tight seal.

A manway gate assembly couples to a tank and provides a liquid tight seal. The manway gate assembly includes a gate selectively slideable in a first linear direction between an open position, a closed position, and/or an intermediate position between the open position and the closed position. The manway gate assembly includes one or more locking members arranged adjacent to the gate and moveable between a locked position and an un-locked position. When in the locked position, the one or more locking members apply a biasing force to the gate in a second linear direction perpendicular to the first linear direction to seal the gate to the tank and provide a liquid tight seal.

The disclosed spool valve is used especially in conveying systems comprising conveying pipes (6, 7) and includes a spool (1) which allows the conveying cross-section of the conveying pipe (6, 7) to be closed. The spool (1) has at least one through-hole (33). The conveying pipe (6, 7) is sealed from the spool (1) by at least one sealing ring (27, 28). Said sealing ring (27, 28) surrounds the conveying line (6, 7) and includes a washer-shaped sealing portion. Said sealing portion lies flat on the spool and seals under the effect of the difference between the pressure in the conveying line (6, 7) and the ambient pressure.

A replaceable liner is for use with a storage tank hatch having a rim adapted to engage with a gasket within a cover and a neck extending vertically downward from the rim to define an aperture that provides access to an inside of the storage tank. The replaceable liner has a body having a rim-facing surface having a vertical cross sectional shape that conforms to a vertical cross sectional shape of the rim and a horizontal cross sectional shape that conforms to a perimeter of the rim, and a gasket facing surface opposite the rim facing surface. Sealant is provided along the rim facing surface of the body, the rim facing surface of the body adapted to engage the rim in a vapor-tight seal, and the gasket facing surface adapted to engage the gasket in a vapor-tight seal.

A manway gate assembly couples to a tank and provides a liquid tight seal. The manway gate assembly includes a gate selectively slideable in a first linear direction between an open position, a closed position, and/or an intermediate position between the open position and the closed position. The manway gate assembly includes one or more locking members arranged adjacent to the gate and moveable between a locked position and an un-locked position. When in the locked position, the one or more locking members apply a biasing force to the gate in a second linear direction perpendicular to the first linear direction to seal the gate to the tank and provide a liquid tight seal.