COOLING WATER CORROSION INHIBITOR DM -130 (Diesel guard nb )

DM -130 is a dry powder based on organic corrosion inhibitor , nitrite , borate for use in closed cooling water systems.

Direction for Use

Cooling water systems must be protected by corrosion inhibitors and DM- 130 is a highly effetive for common ferrous and no ferrous metals.
DM -130 makes stable film oxide and prevent corrosion caused by electrolyic action between dissimilar metals used in the system.
DM -130 is no effect on non metal parts like seals, glands packing , hose, gaskets, which used in these systems.
DM -130 is alkaline and will suppress acid corrosion, which would otherwise result in corrosion damage such as pitting. If systems are contaminated with oil or scale there are suitable cleaner for washing systems like cleaner 517 or powder descale and use DM -130
DM-130 can be used with antifreeze if necessary .
NOTE : DM -130 should not be used for Aluminium systems.

Dosing Method

DM -130 should be dosed into a suitable point in the cooling water systems, after it has been throughly mixed with water. If the expansion tank is used the adequate circulation must be assured.
Dosing and Control
Initial dosage for an untreated system is 2kg/1000 litres of untreated distilled water .This will bring the treatment up to the minimum level of 1000 ppm.
Necessary equipment to carry out the control tests. The dosage chart give below is for convenience calculating the amount of DM -130 requried to bring treatment level to the suitable point between in the minimum and maximum. This being 1440 ppm nitrite .
Normal nitrite limits : 1000-2400 ppm (NO2 ) . After a short period of use the operator will be able to easily determine the dosage requried to maintain proper treatment level .

nitrite as ppm (NO2) 0 180 360 540 720 900 1080 1260 1440 1620-2400

DM-130 kg/ 1000 lit 2.88 2.52 2.16 1.8 1.44 1.08 0.72 0.36 0 0

The pH should be maintained between 8.3 and 10.0 by the treatment.
The engine manufacturer’s recommendation for water quality should complied with chloride levels should be as low as possible . Most engine manufacturer recommend a maximum of 50 ppm chloride. it is better to use distilled water as make up.
DM-130 is very soluble. One kilogram of DM-130 should be dissolved in 10 litres of hot water before adding into the systems .

Features , Benefits and Application

• Prevent corrosion by creating film oxide.
• Effective against cavitation and erosion .
• No effect on hoses, gaskets and seals
• compatible with glycole based types of antitfeeze.
• Simple control tests .
• DM -130 can be used for corrosion inhibition in many types of closed recirculation systems
such as :
- Diesel engine cooling water systems
- Compressor cooling water systems
- Centralised cooling systems.
- Hot water heating systems..

	No. 1, Asadpour Alley, Arghavan St., Nouri Niaraki St., Ostad Moein St., Tehran, Iran
	(+98 21) 66069435-66095728-66095047-66095384
	(+98 21) 66001477
	info@delaranrooz.com

Marine industries