A fluid container designed for filling through an opening in a bottom surface. The fluid container includes a connection device, including a ring crimped around the opening and a cap. The ring may include a ferrous metal. The cap may include a magnetic material. The cap may be removable from the fluid container. The cap is coupled to the ring via magnetic attraction to seal the opening in the bottom surface in a fluid container closed position. The connection device is designed to transition from the fluid container closed position to a fluid container open position when the connection device is coupled to a filling device for filling of the fluid container.

A valve interlock system for a railcar including a valve stem locking subsystem that includes a coupling device rotatably coupled to the valve stem. The coupling device is substantially stationary in the longitudinal direction and rotatably translatable about a longitudinal axis and defines an engagement slot thereon. The subsystem also includes a stationary support member extending toward the coupling device in a transverse direction perpendicular to the longitudinal direction and includes a locking member that is transversely translatable and complimentary with the engagement slot. The subsystem also includes a biasing device coupled to the locking member that increases an engagement bias as the locking member is transversely translated away from the engagement slot. The subsystem further includes a valve operator assembly that includes a longitudinally and rotatably translatable body configured to regulate the slot engagement bias as a function of a longitudinal position of the body.

A valve interlock system for a railcar including a valve stem locking subsystem that includes a coupling device rotatably coupled to the valve stem. The coupling device is substantially stationary in the longitudinal direction and rotatably translatable about a longitudinal axis and defines an engagement slot thereon. The subsystem also includes a stationary support member extending toward the coupling device in a transverse direction perpendicular to the longitudinal direction and includes a locking member that is transversely translatable and complimentary with the engagement slot. The subsystem also includes a biasing device coupled to the locking member that increases an engagement bias as the locking member is transversely translated away from the engagement slot. The subsystem further includes a valve operator assembly that includes a longitudinally and rotatably translatable body configured to regulate the slot engagement bias as a function of a longitudinal position of the body.

A railway tank car having a dis-engageable valve handle assembly configured to selectively engage, lock, and actuate a discharge valve assembly connected to a tank of railway tank car, wherein the dis-engageable valve handle assembly is configured to prevent accidental or inadvertent opening of a valve of the discharge valve assembly in the case of an accident or a derailment of the railway tank car.

A railway tank car having a dis-engageable valve handle assembly configured to selectively engage, lock, and actuate a discharge valve assembly connected to a tank of railway tank car, wherein the dis-engageable valve handle assembly is configured to prevent accidental or inadvertent opening of a valve of the discharge valve assembly in the case of an accident or a derailment of the railway tank car.