Abstract: A tank for bulk material storage and transport and method for producing same. In an embodiment, a tank is provided that includes a shell having a sidewall, a neck including a first collar, and a tube terminating in a second collar. A frustoconical cap may be secured to the first collar. A substantially conical cap may be secured to the second collar. A liner may be applied to the shell so that the liner substantially covers an interior surface of the sidewall, an interior surface of the neck, at least a portion of the first collar, an interior surface of the tube, and at least a portion of the second collar. Annular thickened segments may be trimmed to prepare the tank for use. The annular thickened segments may be located at an interior joint between the frustoconical cap and the first collar, and/or an interior joint between the substantially conical cap and the second collar. The trimming step may form first and second sealing surfaces of the liner adjacent respectively to the first and second collars.

Abstract: A tank for bulk material storage and transport and method for producing same. In an embodiment, a tank is provided that includes a shell having a sidewall, a neck including a first collar, and a tube terminating in a second collar. A frustoconical cap may be secured to the first collar. A substantially conical cap may be secured to the second collar. A liner may be applied to the shell so that the liner substantially covers an interior surface of the sidewall, an interior surface of the neck, at least a portion of the first collar, an interior surface of the tube, and at least a portion of the second collar. Annular thickened segments may be trimmed to prepare the tank for use. The annular thickened segments may be located at an interior joint between the frustoconical cap and the first collar, and/or an interior joint between the substantially conical cap and the second collar. The trimming step may form first and second sealing surfaces of the liner adjacent respectively to the first and second collars.

Abstract: A tank for bulk material storage and transport and method for producing same. In an embodiment, a tank is provided that includes a shell having a sidewall, a neck including a first collar, and a tube terminating in a second collar. A frustoconical cap may be secured to the first collar. A substantially conical cap may be secured to the second collar. A liner may be applied to the shell so that the liner substantially covers an interior surface of the sidewall, an interior surface of the neck, at least a portion of the first collar, an interior surface of the tube, and at least a portion of the second collar. Annular thickened segments may be trimmed to prepare the tank for use. The annular thickened segments may be located at an interior joint between the frustoconical cap and the first collar, and/or an interior joint between the substantially conical cap and the second collar. The trimming step may form first and second sealing surfaces of the liner adjacent respectively to the first and second collars.

Abstract: A tank for bulk material storage and transport and method for producing same. In an embodiment, a tank is provided that includes a shell having a sidewall, a neck including a first collar, and a tube terminating in a second collar. A frustoconical cap may be secured to the first collar. A substantially conical cap may be secured to the second collar. A liner may be applied to the shell so that the liner substantially covers an interior surface of the sidewall, an interior surface of the neck, at least a portion of the first collar, an interior surface of the tube, and at least a portion of the second collar. Annular thickened segments may be trimmed to prepare the tank for use. The annular thickened segments may be located at an interior joint between the frustoconical cap and the first collar, and/or an interior joint between the substantially conical cap and the second collar. The trimming step may form first and second sealing surfaces of the liner adjacent respectively to the first and second collars.

Abstract: A combination flow control and reverse flow check valve controls the flow of fluid in a desired downstream direction and limits undesired backflow of liquid in an upstream direction into a fluid source such as a reservoir. The flow control and reverse flow check valve may include a housing having a fluid conveying channel with an upstream end configured for mounting to the liquid source and a downstream end for discharging fluids, a flow control valve positioned between the ends, and a check element positioned in the channel between the flow control valve and the downstream end. The check element is advantageously positioned between the flow control valve and the downstream end of the housing to prevent possible contaminants in a backflow liquid from reaching the flow control valve.

Abstract: A combination flow control and reverse flow check valve controls the flow of fluid in a desired downstream direction and limits undesired backflow of liquid in an upstream direction into a fluid source such as a reservoir. The flow control and reverse flow check valve may include a housing having a fluid conveying channel with an upstream end configured for mounting to the liquid source and a downstream end for discharging fluids, a flow control valve positioned between the ends, and a check element positioned in the channel between the flow control valve and the downstream end. The check element is advantageously positioned between the flow control valve and the downstream end of the housing to prevent possible contaminants in a backflow liquid from reaching the flow control valve.

Abstract: A combination flow control and reverse flow check valve controls the flow of fluid in a desired downstream direction and limits undesired backflow of liquid in an upstream direction into a fluid source such as a reservoir. The flow control and reverse flow check valve may include a housing having a fluid conveying channel with an upstream end configured for mounting to the liquid source and a downstream end for discharging fluids, a flow control valve positioned between the ends, and a check element positioned in the channel between the flow control valve and the downstream end. The check element is advantageously positioned between the flow control valve and the downstream end of the housing to prevent possible contaminants in a backflow liquid from reaching the flow control valve.

Abstract: A combination flow control and reverse flow check valve controls the flow of fluid in a desired downstream direction and limits undesired backflow of liquid in an upstream direction into a fluid source such as a reservoir. The flow control and reverse flow check valve may include a housing having a fluid conveying channel with an upstream end configured for mounting to the liquid source and a downstream end for discharging fluids, a flow control valve positioned between the ends, and a check element positioned in the channel between the flow control valve and the downstream end. The check element is advantageously positioned between the flow control valve and the downstream end of the housing to prevent possible contaminants in a backflow liquid from reaching the flow control valve.

Abstract: A combination flow control and reverse flow check valve provides a compact valve unit for controlling the flow of fluid in a downstream direction and limiting undesired backflow of liquid into a source such as a reservoir. The flow control and reverse flow check valve may be provided as a unitary member having a housing with an upstream end configured for mounting to the liquid source, a fluid conveying channel within the housing, and a check element positioned in the channel between the flow control valve, such as a ball valve, and a seat which is complementally configured with the check element to normally seal against backflow. A blocking element may be provided to prevent interference of the check element with the operation of the flow control valve while permitting liquid to flow in an intended downstream direction.

Abstract: A combination flow control and reverse flow check valve provides a compact valve unit for controlling the flow of fluid in a downstream direction and limiting undesired backflow of liquid into a source such as a reservoir. The flow control and reverse flow check valve may be provided as a unitary member having a housing with an upstream end configured for mounting to the liquid source, a fluid conveying channel within the housing, and a check element positioned in the channel between the flow control valve, such as a ball valve, and a seat which is complementally configured with the check element to normally seal against backflow. A blocking element may be provided to prevent interference of the check element with the operation of the flow control valve while permitting liquid to flow in an intended downstream direction.

Abstract: A shaft seal consisting of a generally tubular hollow body formed of plastic and having lip seal portions at each end. Flexure grooves in the body enable lip seals on the inner surface of the body to be biased into sealing engagement with a shaft extending through the seal body.

Abstract: A plastic tank for storage and transport of liquids having a reinforcing sleeve for the discharge spout of the tank. The reinforcing sleeve comprises two identical generally C-shaped plate members which each have an overall circumferential length greater than one-half the circumference of the discharge spout to enable each plate member to be snap fit around the discharge spout and retained in place thereon. Each plate member has a V-shaped projection extending circumferentially from one end, and a corresponding recess at the other end to enable the plate members to interlock with one another and to axially self align on the discharge spout with the tip of the V-projection seating into the groove in the V-shaped recess.

Abstract: A supply system is disclosed for continuously supplying a liquid for in-plant use comprising a stationary liquid supply tank connected to an in-plant pumping or receiving system. The liquid supply tank is periodically refilled from a transport tank which is positioned on top of the supply tank and connected to the supply tank via a hose assembly connecting a bottom discharge in the transport tank to a top inlet in the supply tank. A sight tube is provided in the lower supply tank for visualizing the liquid level in the supply tank, and a vapor return tube is provided for removal of vapor from the supply tank to the transport tank as the transport tank contents are drained into the supply tank. Once the contents of the transport tank have been emptied into the supply tank, the transport tank is removed and returned to the liquid supplier for recycling. The supply tank is never completely emptied thereby enabling the flow of liquid to continue uninterruptedly for use in the plant.

Abstract: A portable tank for storage and transport of liquids has a bottom discharge opening closed by a discharge valve connected to the bottom of the tank. The discharge valve has a hollow valve body, a movable valve disk positioned within the body, and a handle connected to the valve disk extending through an opening in the valve body. The handle is rotatable to open and close the valve. A stationary locking plate is secured to the valve body and a locking member is movably mounted on the valve handle. The locking member is movable to and from a position in which the locking member is in an interference relationship with the locking plate locking the handle and, correspondingly, the valve disk in a predetermined position when the locking member is in the interference position.

Abstract: A tank having a top surface with a top opening bounded by an upwardly extending tubular neck and a lid. A seal member on the lid is in sealing engagement with the neck inner surface so that the lid can move up and down without losing the seal. A lid retaining member is mounted on the top surface of the tank so as to retain the lid in a position in which the sealing engagement is maintained when the interior of said tank is pressurized so as to urge the lid upwardly and structure is provided for insuring against inadvertent removal of the retaining member.

Abstract: A composite metal and plastic tank consisting of a metal frame assembly with a replaceable hollow plastic container mounted therein. The plastic container has downwardly inclined flow channels formed in its base to insure complete drainage of the container when desired and the bottom wall of the frame assembly is flat to enable handling of the tank with conventional fork lift equipment. A comprehensive dunnage plate is interposed in the frame assembly between the container base and the frame bottom wall.