Abstract: A system for cleaning a container that includes a cleaner positioned inside the container that includes a spray nozzle, an arm configured to move the nozzle, and a fluid recovery device positioned inside the container. The fluid recovery device may include a return line configured to convey a waste fluid from the container and an injection line. The injection line may add a flow additive internal or external to the return line. The system may also include a supply pump positioned outside the container; and a retrieval pump positioned outside the container.

Abstract: A system for cleaning a container may include: a fluid source; an arm that moves a nozzle in at least two directions; a fluid retrieval device; a separator; and a fluid mover. One method for cleaning includes securing an arm to a support positioned at least partially outside of the container; spraying a fluid onto an inner surface of the container using the nozzle; drawing the fluid and an entrained material out of the container using the fluid retrieval device; removing at least some of the entrained material from the fluid using the separator; and conveying the fluid from the separator to the nozzle using the fluid mover. The arm and/or the fluid retrieval device may be remotely installed.

Abstract: A proportional fluid flow control hydraulic valve including a valve body in which a by-pass flow passage leads from an inlet port to a by-pass outlet port. A valve chamber is arranged between the inlet port and a regulated flow outlet port and the by-pass outlet port. The by-pass flow passage includes an annular auxiliary flow channel which extends in bypassing relationship around the valve chamber. A valve member movably mounted in the valve chamber has valve ports therein for controlling fluid flow from the inlet port and the auxiliary fluid flow channel past the valve member to the regulated flow passage. In one form, the valve member is normally disposed in balanced hydraulic equilibrium in the valve chamber to prevent fluid flow from the inlet port through the auxiliary fluid flow channel and the valve ports in the valve member into the valve chamber and thence into the regulated flow passage.