Spray Washers Information

Spray washers clean parts with a directed, pressurized spray of hot water, detergent or cleaning solution. They are used to remove grease, soil, oil, abrasive dust, blast debris, swarf, paint, corrosion or other contaminants from the surfaces of components exiting from a production line. Turnkey systems include all of the components required for parts washing applications: tanks, agitators, ultrasonic transducers, pumps, pressure generators, cabinets, nozzles, brushes, spinning spray arms, wheels and water softeners. Replacement equipment and components are also available. Typically, immersion tanks or wash tanks are made of glass, plastic, stainless steel, carbon steel, or mild steel. Part cleaning equipment is usually mounted on the floor, a skid, a bench, or pedestal. Some spray washers can be programmed with a personal computer (PC) or software interface. Others use a CNC controller to change or adjust parameters such as heat, pressure, speed, applied load, or flow rate in a pre-programmed manner. 


Spray washers are used to perform many different cleaning processes. Hot water cleaning uses a heated water supply or steam for cleaning and surface preparation. Aqueous cleaning uses water or a water-based cleaning solution to wash part surfaces. Parts cleaning machines that use solvent or solvent vapors are also available. With solvent vapor degreasers, the solvent is evaporated and then condensed on the parts surface. The condensed solvent cleans the parts and then drips back into the tank for subsequent reclamation or disposal. Abrasive-enhanced cleaning sucks abrasive particles into a gun, nozzle or lance through a Venturi generation process. Applications for spray washers include general cleaning and surface preparation, container or bottle cleaning, contaminant removal, degreasing, descaling or stripping, dunnage or pallet cleaning, and sterilizing or disinfecting.


Spray washers differ in terms of performance specifications, part capacity specifications, part loading and handling, and special features. Performance specifications include spray pressure, flow rate, heater power, wash tank capacity, and power source type. Part capacity specifications include internal length, internal depth or height, and maximum part capacity weight. Front loading, top loading, continuous loading, indexing, and return-to-operator spray washers are commonly available. In terms of features, some products apply pretreatments or post-process coatings. Others include multiple cabinets or tanks for storing different cleaning or rinsing solutions. Spray washers that provide integral drying include a heater, process dryer, auxiliary nozzle, or air blow gun. Machines with integral rinsing are used to remove residual amounts of cleaning solution after the washing process is complete.