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ROCHEM AIR COOLER CLEANER

 

Rochem Air Cooler Cleaner (R.A.C.C.) is a liquid blend of highly active cleaning and corrosion inhibiting compounds. R.A.C.C. has been developed for safe, fast and economical in service cleaning of the air handling systems of turbo charged diesel engines

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By using R.A/C/C/, air borne contaminants which have been carried into and deposited on scavenger air trunks, air coolers and inlet valves are removed. Thus, all surfaces are kept clean and free of deposits.

 

ADVANTAGES

 

1. By using R.A.C.C. and R.A.C.C. injection System fouling of air coolers is reduced thus heat transfer and engine efficiency is improved. Pressure drop across the air cooler and air temperature after the air cooler are kept to a minimum.


2. Fire hazards from the build-up of grease and residue are minimized.


3. Down time and expense of periodic dismantling of the air handling system for cleaning is eliminated.


4. Scavenging efficiency is improved by the reduction of deposit build-up around scavenging ports.


5. Water displacing surfactants incorporated in R.A.C.C. form a mono molecular film throughout the air handling system which protects the metals and reduces the adherence of airborne contaminants.

 

USAGE

 

R.A.C.C. is suitable for all types of diesel engines.

 

The R.A.C.C./fresh water mixture has no flash-point and cylinder lubrication is not impaired.

 

DOSAGE

 

The following table shows our recommendation for initial dosage per air cooler. This is based on one injection every 24 hours. This can be varied based on performance of the pressure drops across the air coolers.

 

ENGINE PERFORMANCE ......................................... DOSAGE PER 24 HOURS
H.P. ...............................................RACC CONCENTRATE................. RACC/WATER MIXTURE
5,000 - 10,000 ...................................... 1.0 LITRES..................................... 3.0 LITRES
10,000 - 25,000..................................... 1.5 LITRES..................................... 4.5 LITRES
OVER 25,000......................................... 2.0 LITRES..................................... 6.0 LITRES

 

APPLICATION

 

R.A.C.C. can be applied by injection, immersion or circulation. For immersion and circulation , cleaning time is reduced considerably by heating the chemical to maximum 50 C (122 F). If the air coolers are very dirty it may be advisable to use Rochem Alkleen to thoroughly clean the system before commencing R.A.C.C. injection treatment.

 

IMMERSION METHOD

 

The dismantled parts to be cleaned are laid in a tank specially designed for the purpose, which has been filled with R.A.C.C. Movement is achieved by means of compressed air. Cleaning time : 5 - 12 hours.

 

CIRCULATION METHOD

 

The equipment to be cleaned (fuel oil-heater, oil cooler, etc.) is connected to a pump and a tank by means of tubes. Depending on the degree of fouling. R.A.C.C. is circulated through the equipment for 5 - 15 hours. The Rochem cleaning tank together with R.A.C.C. is especially suited for this type of job. The advice of a Rochem service engineer should be sought to help with the solution of any special problems.

 

INJECTION METHOD

 

By means of Rochem's special R.A.C.C. injection system a mixture of R.A.C.C. and fresh water in a ratio of 1:2 (observe the mixture ration exactly) is injected into the air channel between the turbo blower and the air cooler. This is followed by a second injection of fresh water only.
Injection procedure as per the R.A.C.C. injection system diagram, is as follows:


1. Fill the dosing tank with the required quantity of R.A.C.C./fresh water mixture. Close the tank.
2. Open Valve 1 (compressed air for atomiser).
3. Open Valves 2 and 3; following equalization of pressure to the scavenging air line the R.A.C.C./fresh water mixture is injected in about 5.10 minutes.
4. Close Valves 1, 2, and3.
5. open Valve 4 to vent air from tank.
6. Fill the tank with fresh water. Close the tank. Then repeat steps 2 - 5.

 

HANDLING INSTRUCTIONS

 

Precautionary measure - should R.A.C.C. come in contact with the skin, rinse off with plenty of water, and then rub in any oily cream. Protect the eyes. R.A.C.C. concentrate actually has a very high flash-point, but should be kept away from open fire.

 

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