Granular material flows out through the discharge opening of a silo and through a sealed housing to a target location. A vent opening in a top portion of the silo has a vent cover operative to selectively open and close the vent opening. When the vent cover is closed, air movement into an upper portion of the silo is prevented. A gate is operative to control a flow of granular material through the discharge opening. A vacuum conduit has a lower input end thereof connected to an interior of the housing, and an upper output end thereof located in an upper portion of an interior of the silo. Material flowing out of the silo creates a vacuum drawing dust from the housing up the vacuum conduit into the silo.

Granular material flows out through the discharge opening of a silo and through a sealed housing to a target location. A vent opening in a top portion of the silo has a vent cover operative to selectively open and close the vent opening. When the vent cover is closed, air movement into an upper portion of the silo is prevented. A gate is operative to control a flow of granular material through the discharge opening. A vacuum conduit has a lower input end thereof connected to an interior of the housing, and an upper output end thereof located in an upper portion of an interior of the silo. Material flowing out of the silo creates a vacuum drawing dust from the housing up the vacuum conduit into the silo.

A system and method removes well fluids, which include gas and liquids, from a storage tank. The storage tank has a gas relief valve that opens to admit atmospheric air into the storage tank when the pressure of a gas cap decreases below a vacuum threshold pressure. Well fluids flow into the storage tank and the level of liquid is monitored. When the level reaches a first level, a pump is operated by a controller to remove liquid from the storage tank. The pressure in the gas cap is monitored while the pump is operating. The speed of the pump is adjusted to maintain the gas cap pressure above the predetermined pressure and avoid the introduction of atmospheric air into the gas cap.

A system and method removes well fluids, which include gas and liquids, from a storage tank. The storage tank has a gas relief valve that opens to admit atmospheric air into the storage tank when the pressure of a gas cap decreases below a vacuum threshold pressure. Well fluids flow into the storage tank and the level of liquid is monitored. When the level reaches a first level, a pump is operated by a controller to remove liquid from the storage tank. The pressure in the gas cap is monitored while the pump is operating. The speed of the pump is adjusted to maintain the gas cap pressure above the predetermined pressure and avoid the introduction of atmospheric air into the gas cap.

An overfill indicator for a flexible collapsible liquid storage tank made of a liquid impervious fabric and having a floor and a top wall with a vent therein, the overfill indicator comprising a connector portion adapted to removably connecting to the vent of the tank, an indicator movably mounted to the connector portion, the indicator being moveable between a resting position and a visually noticeable alert position, a base portion located on the inside of the tank and on the floor thereof and aligned with the vent, and a linkage connecting the base to the indicator such that the indicator is moved from the resting position to the alert position as the top wall of the tank reaches a threshold distance from the floor as the tank is filled with liquid, wherein said threshold distance coincides with the tank having reached a desired liquid capacity.

An overfill indicator for a flexible collapsible liquid storage tank made of a liquid impervious fabric and having a floor and a top wall with a vent therein, the overfill indicator comprising a connector portion adapted to removably connecting to the vent of the tank, an indicator movably mounted to the connector portion, the indicator being moveable between a resting position and a visually noticeable alert position, a base portion located on the inside of the tank and on the floor thereof and aligned with the vent, and a linkage connecting the base to the indicator such that the indicator is moved from the resting position to the alert position as the top wall of the tank reaches a threshold distance from the floor as the tank is filled with liquid, wherein said threshold distance coincides with the tank having reached a desired liquid capacity.

Embodiments described herein include layered mesh containers and methods for using the containers to safely transport and dispose of airbag inflators having ammonium-nitrate-based propellant. For example, a container is provided that can hold multiple airbag inflators and withstand up to 4 moles of matter being deployed from an inflator having ammonium-nitrate-based propellant. The container can contain the inflator and any shrapnel associated with the explosion while also venting gases expelled as a result of the explosion. Various container designs are provided, along with methods for using these containers.

Embodiments described herein include layered mesh containers and methods for using the containers to safely transport and dispose of airbag inflators having ammonium-nitrate-based propellant. For example, a container is provided that can hold multiple airbag inflators and withstand up to 4 moles of matter being deployed from an inflator having ammonium-nitrate-based propellant. The container can contain the inflator and any shrapnel associated with the explosion while also venting gases expelled as a result of the explosion. Various container designs are provided, along with methods for using these containers.

A bulk fluid storage container includes a frame assembly having a lower rectangular frame, first and second wheel assemblies extending from opposite ends of the lower rectangular frame, and an upper rectangular frame member arranged in spaced relation to the lower rectangular frame member by a plurality of vertically extending posts. The bulk fluid storage container also includes a fluid storage vessel having first and second end walls held in spaced relation by first and second side walls, a top wall and a bottom wall, which defines a fluid storage volume. A baffle assembly having a plurality of baffle plates is disposed in a space relationship in the fluid storage volume. The frame assembly provides an exoskeletal structure which surrounds the fluid storage vessel and is configured to support a second bulk fluid storage container in a vertically stacked relationship.

A bulk fluid storage container includes a frame assembly having a lower rectangular frame, first and second wheel assemblies extending from opposite ends of the lower rectangular frame, and an upper rectangular frame member arranged in spaced relation to the lower rectangular frame member by a plurality of vertically extending posts. The bulk fluid storage container also includes a fluid storage vessel having first and second end walls held in spaced relation by first and second side walls, a top wall and a bottom wall, which defines a fluid storage volume. A baffle assembly having a plurality of baffle plates is disposed in a space relationship in the fluid storage volume. The frame assembly provides an exoskeletal structure which surrounds the fluid storage vessel and is configured to support a second bulk fluid storage container in a vertically stacked relationship.