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Articles about: 28 kHz

15 articles

Parts and contaminants · 4 min readUltrasonic cleaning in hospital technical servicesCastors, trolley parts, kitchen filters and grilles: what a hospital's technical service can clean in an industrial tank, and the line it must not cross.

Parts and contaminants · 3 min readRemoving carbon deposits from engine valvesIntake valves on direct-injection petrol engines and exhaust valves on every engine carry hard carbon on the tulip and stem. How to clean valves once the head is off, keep each valve with its guide, and tell a cleaned valve that can be refaced from one that is scrap.

Parts and contaminants · 4 min readCleaning threaded parts and blind holes with ultrasoundTapped holes, blind bores and internal threads trap chips, coolant and air. Why the trapped air is the real enemy, how part orientation, degassing and movement get the liquid in, which frequency suits fine threads, and how to get the liquid out again.

Parts and contaminants · 4 min readCleaning meat processing blades with ultrasoundMincer knives and hole plates, bowl-cutter knives, slicer blades and skinner blades carry fat and protein in their bores, holes and hubs. How to clean machine blades so they come out ready for disinfection, the temperatures for protein, and how to protect the edges and the matched sets.

Parts and contaminants · 3 min readCleaning conveyor components in food production with ultrasoundModular belt sections, sprockets, chain links, guides and rollers collect product in hinges and joints that spray cleaning does not reach. Which conveyor parts come off for ultrasonic cleaning, the temperature limits of plastic belting, and how to size a tank for belt modules and sprockets.

Parts and contaminants · 3 min readCleaning bakery equipment with ultrasoundBaking tins and trays, depositor nozzles and pistons, divider parts, slicer blades and cutters carry dough, sugar, fat and carbonised release agent. What ultrasonic cleaning removes in a bakery, what it cannot remove without harsh chemistry, and how to treat coated tins so the coating survives.

Parts and contaminants · 3 min readUltrasonic cleaning of brake calipers for reuseBrake dust, road grime, old fluid and surface rust come off a stripped caliper in one cycle, without dry brushing or blasting the bores. What is removed before the bath, the settings for cast-iron and aluminium calipers, and the steps between the bath and a caliper that is safe to refit.

Parts and contaminants · 3 min readRemoving heavy grease and sludge from engine partsCrankshafts, connecting rods, sumps, timing covers and gearbox cases come in coated in oil, sludge and road grime. The hot soak, the ultrasonic cycle and the skimmer that let one bath degrease a week of engine rebuilds instead of a day.

Parts and contaminants · 3 min readUltrasonic cleaning of turbocharger componentsCoked oil in the bearing housing, soot in the turbine housing, sticking vanes in a variable-geometry ring, oil film on the compressor side. How a turbo rebuilder strips and cleans each part, which metals need which bath, and what gets replaced rather than cleaned.

Parts and contaminants · 3 min readUltrasonic cleaning of cylinder heads for automotive repairCarbon in the chambers and ports, oil sludge under the cam covers, scale in the water jacket, gasket remains on the deck. How a head is stripped, which bath suits aluminium and which suits cast iron, and where cleaning sits between crack testing and valve-seat work.

Parts and contaminants · 4 min readCleaning EGR valves in an ultrasonic tankSoot and oil mist bake into a hard cake in the EGR valve and its passages. How to remove the bulk, protect the actuator, which liquid and temperature break the rest, and how to tell a cleaned valve from one that needs replacing.

Parts and contaminants · 3 min readUltrasonic cleaning of diesel injectors in the workshopCarbon at the nozzle, tar from blow-by on the body, lacquer inside. How common-rail injectors are prepared, which parts go in the bath and which never do, the liquid, temperature and time, and why the test bench has the last word.

Parts and contaminants · 4 min readRemoving carbon deposits and baked-on oilCarbon on pistons, valves, injectors, turbo housings and EGR valves is oil that has been cooked onto the metal. It needs the hot end of the bath, the strong end of the chemistry, 28 kHz, and time. What works, what does not, and how to avoid damaging aluminium in the process.

Process and parameters · 2 min read28 kHz or 40 kHz: which frequency cleans your part?Lower frequency hits harder, higher frequency reaches further. The part, the soil and the surface decide.

Process and parameters · 2 min readParticle size removal versus ultrasonic frequencyLower frequencies make bigger, more energetic bubbles for heavy soil; higher frequencies make smaller, gentler bubbles that do better on fine particles. How to choose between 28 and 40 kHz.