There are many vehicle parts such as engine block, dpf, Injector nozzles, cylinder piston, vacuum booster valve diaphragm, valve tappets, VVT solenoid valves, timing chain, wheel speed sensor head is with heavy dirty and very difficult to clean. The dirty such as : carbon coking, sludge glue, covered in  limescale and rust, metal abrasive.

By ultrasonic cleaning, the car engine is 99.8 of cleaning in  particle/ oil,  cleaning speed increase 12 times (ultrasonic cleaning takes 13 minutes, while other cleaning needs 3 hours ); cleaning cost save 76%(cleaning aolvent only 1/4 than conventional cleaning ). 
ultrasonic cleaning, it can filter the oil and dirty particle from waste water, cut the cost for waste water cost. 

Notes clean engine blocks by ultrasonic cleaner:
1.Aluminum parts:  Do not use strong alkaline solutions with pH 10 are prohibited (to prevent intergranular corrosion)
2. Precision bearings: must be dismantled for cleaning (to prevent damage from resonance of microbeads).
3. Rubber seals: temperatures of ≤ 70°C (to prevent cracking from aging).
Post-cleaning treatment: must be blown out with inert gas (to prevent secondary rusting of cast iron parts).

How to use ultrasonic machine to wash engine blocks？
1.Dismantling and Sorting：1.1.Dismantling the ECU/sensors and other electronic control components.

1.2. Separate rubber/plastic seals. 1.3.Disassembled cylinder head/oil pan/piston ring.
2. Ultrasonic cleaning : 2.1.Neutral cleaning water (PH 7.2) + 40kHz. 2.2. Ultrasonic power density ≥15W/L.
3. Rinsing washing :
3.1 .swirl rinsing, Bi-directional rotating water flow (30rpm).
3.2. .Automatic spraying of deep holes in oil passages.

4. vacuum drying: 70°C hot air + -0.08MPa negative pressure.
5. Engine film protection:With fully synthetic rust inhibitor solution for ultrasonic cleaning.

There are many circuit boards such as consumer electronics, automotive EU control Boards, LED aluminum substrates,industrial control power supply boards, flexible circuit boards, packaging boards and other circuits. These circuit boards are with different dirty, such as: post-welding residue, particle attachment,organic pollution。 By ultrasonic cleaning, it save 10 times of cleaning time (ultrasonic cleaning takes 18 minutes, while labors need 3 hours; by ultrasonic cleaning system, drying the circuit board increase 7 times of capability（By ultrasonic system takes 3 minutes, labor drying needs 21 minutes). Besides, ultrasonic cleaning system can contiously working. 
Advantages to clean PCB by ultrasonic cleaning system :
1.Increase cleaning effect: Ion contamination control: single tank cleaning effect is 5.81μg/cm² while three tanks cleaning system cleaning effect is 0.02μg/cm² , contamication decrease 99.6% .
2. Highly increase cleaning efficiency ： By single tank takes 25 minutes for whole processes, it only takes 8 minutes by three tanks cleaning system.
The drying speed: By single tank takes 2 hours to dry, three tanks system clean 15 minutes. By single tank, every day clean 80pcs, by three tanks system clean 250pcs per day.
3. Zero Damage Guarantee: Spraying wash: use flexible water flowreplacealternative to steel brush , to avoise avoid 0201 resistance off.Ion wind to eliminate static electricity (voltage**5V**, ESD sensitive parts safety).Temperature control + air flow to prevent BGA soldering ball micro-cracking(ΔT3℃/sec.
4. Save cleaning cost : 
4.1. Waste liquid volume decrease 82% : spraying tank with recycle filter and purification system, only use water3L/batch.
4.2. Power consumption : Single tank machine power consume: usd0.08/piece, while three-tanks cleaning system only costusd 0.027/piece, cut 66% consumption.
4.3. Decrease PCB failure rate: By single tank, the pcb failure ratio is 8.3% ,and by three tanks system, the failure ratio at 0.05%.
5. Full compliance coverage:
1.Meets Military Standard MIL-STD-2000A Cleanliness (Ion Residue1.56μg/cm²).
2. The drying tank meets the J-STD-033B standard for storage of moisture-sensitive devices.

How to clean PCB mother by ultrasonic cleaning system ?
1.Ultrasonic cleaning tank: (40kHz/60℃/5min ) to clean solder paste/flux from mother board.
2.Spraying washing tank: (55℃ deionized water/0.1MPa pressure), to cleanμm particle residue.
3. Dryer tank: (65℃/15m³/min circulating air)dry the mother boards with zero watermarks and anti-oxidation.

One circuit board cleaning case:
Monthly production capacity: 
220,000pcs PCB,  return repair&maintenace save 3.8million per year,electricty power consumption save 8 times (Ultrasonic cost 0.17kWh /piece, labor cost 1.53kWh/piece).