A high-pressure cleaning apparatus including a high-pressure pump that includes a suction chamber, at least one pump chamber in which liquid is pressurized, and a pressure chamber arranged downstream of the pump chamber is disclosed. The high-pressure pump includes a return line via which the pressure chamber is in flow communication with the suction chamber, and a valve unit by which a free cross-sectional area of the return line is changeable. The high-pressure cleaning apparatus also includes a drive unit associated with the valve unit, a control unit coupled to the drive unit and a pressure sensor coupled to the control unit for detecting liquid pressure on the pressure side of the pump chamber. Depending on the signal of the pressure sensor, the liquid pressure can be controllable to a predetermined or predeterminable liquid pressure by changing of the free cross-sectional area of the return line.

The disclosure includes a watercraft cleaning system that includes a housing, a water input line, a pump and motor system, a high-pressure output line, and a heater. The cleaning system can be arranged and configured to be coupled to a dock post located adjacent a watercraft. The system can easily and conveniently allow watercraft personnel to clean the watercraft.

Water conditioning systems are shown and described. The water conditioning systems include a water conditioner having a plurality of conditioning stages along a flow path between an inlet and an outlet that are configured to condition water. The plurality of conditioning stages include a pre-filter stage, a feed pump, a reverse osmosis stage, and a post-filter stage. A pure water valve is arranged between the feed pump and the reverse osmosis stage and a boost valve is arranged between the feed pump and the outlet. The pure water valve is configured to selectively allow water to flow from the feed pump, through the reverse osmosis stage and the post-filter stage, prior to exiting through the outlet, and the boost valve is configured to selectively allow water to flow from the boost pump directly to the outlet and bypassing the reverse osmosis stage and the post-filter.

A system for the maintenance and operation of an air-cooled heat exchanger (ACHE) includes a plurality of spray tubes provided with spaced-apart nozzles permanently positioned between the finned heat exchange tubes and longitudinally aligned within the region of the finned-tube pitch. The system is operable in several modes, including cleaning where the flow of air is stopped and temperature-controlled pressurized water with an optional cleaning agent is discharged from the nozzles to dislodge dirt and debris from the finned surfaces while simultaneously cooling the hot process liquid. When extremes of ambient air temperatures preclude the forced air fans from achieving the target temperature range of the process liquid passing through the ACHE, refrigerated pressurized cooled water and compressed air in the form of a mist is discharged from the nozzles, or alternatively, pressurized heated air is discharged from the nozzles.

A pressure washer includes a motor configured to drive a pump, a frame having first and second end portions, a handle having first and second end portions, and a rotating joint rotatably coupling the first end portion of the handle to the second end portion of the frame. The rotating joint includes a locking mechanism to selectively lock the position of the handle relative to the frame. The handle rotates between a storage position and an extended position. In the storage position, the second end portion of the handle is positioned near the first end portion of the frame such that the motor and the pump are located within a volume defined by the first and second end portions of the handle and the frame. In the extended position, the second end portion of the handle is spaced apart from the frame.

An automatic mold cleaning device includes an automatic cleaning system, a mold clamping system and a waste recovery system.

A pressure washer includes a pump for pressurizing a primary fluid flow, the pump including a pump inlet for receiving fluid from a common fluid source and a pump outlet for supplying a pressurized primary fluid and a jet pump including a primary fluid inlet fluidly coupled to the pump outlet, a secondary fluid inlet configured to receive fluid from the common fluid source, and a fluid outlet. In a high pressure operating mode, all of the pressurized primary fluid flows through the jet pump and exits through the fluid outlet of the jet pump. In a high flow operating mode, all the pressurized primary fluid flows through the jet pump and entrains a secondary fluid supplied through the secondary fluid inlet from the common fluid source so that the secondary fluid also flows through the jet pump, resulting in a combined fluid flow of the primary fluid and the secondary fluid that exits through the fluid outlet of the jet pump.

A liquid dispersion device comprising an elongated dispersion body comprising a first end extending in a first direction and forming an elongated dispersion body comprising a first end positioned at an acute angle relative to a longitudinal axis of the elongated dispersion body, a second end positioned at an obtuse angle relative to the longitudinal axis of the elongated dispersion body, a plurality of nozzles extending outwardly from a forward surface of the dispersion body and a source connector on a rear surface of the dispersion body, the source connector in fluid communication with the plurality of nozzles. A first nozzle among the plurality of nozzles is positioned on the forward surface of the dispersion body at the first end of the dispersion body and a second nozzle is positioned on the forward surface of the dispersion body at the second end of the dispersion body.

A wand apparatus for controlling a pressure washing system and an associated method for controlling a pressure washing system is provided. The wand apparatus may include a first wand portion and a second wand portion. The wand apparatus may further include a chemical control assembly that includes a housing and a chemical control element. The housing defines an outlet aperture, an inlet aperture, and a chemical control aperture. The chemical control aperture is configured to operably engage the chemical control element. The outlet aperture is configured to operably engage the first wand portion, and the inlet aperture is configured to operably engage the second wand portion. Further, operable engagement of the chemical control element may provide for switching the wand apparatus between a chemical spray configuration and a wash spray configuration.

A representative cleaning tool includes: a valve assembly having an inlet, a first outlet, a second outlet and an actuator, the inlet configured to receive a flow of water, the first outlet fluidly communicating with a first conduit, the second outlet fluidly communicating with a second conduit, and the actuator configured to selectively direct the flow of water from the inlet based on a position of the actuator; a mixing assembly fluidly communicating with the second conduit; a detergent reservoir fluidly communicating with the mixing assembly and configured to receive therein a supply of detergent, wherein, based on the actuator being in the second position, the valve assembly directs the flow of water to the mixing assembly, which draws a portion of the supply of detergent from the detergent reservoir and mixes the water and the detergent to form foam that is directed through the second conduit; and a handle configured to be gripped by a hand of a user, wherein the actuator is configured to be moved by the hand of the user while gripping the handle.