Product Dose

Always try to keep HYDRAZINE level at minimum level. As by the decomposition of hydrazine ammonia will be liberated and Ammonia in the presence of oxygen is corrosive to copper and copper alloys.

It will be necessary to test the hydrazine residuals in the boiler daily in order to obtain complete protection with minimum doses of hydrazine. If the hydrazine residual in the boiler is over 0.1 PPM, reduce the dosage of hydrazine until the boiler hydrazine residual falls below the recommended maximum of 0.1 PPM. If the hydrazine residual does not immediately drop below the 0.1 PPM level, the boiler should be blowdown to reduce the hydrazine level. New boilers, or those recently open for inspection and repair, may take several weeks to achieve a normal boiler hydrazine residual due to oxides. This is normal, and until a hydrazine residual is obtained in the boiler water, test the feed water for the hydrazine content. Maintain the hydrazine reading in the feed water between 0.02 and 0.03 PPM. No oxygen is entering the boiler with the feed water when hydrazine is present in the water. hydrazine may be dosed into the feed pump suction, more preferably, to the storage section of the deaerator, which will maximize the residence and reaction time. A separate dosing tank and pump set should be used for dosing hydrazine to the system. (Condensate Control may be fed with the hydrazine.) The estimated daily dose should be mixed with condensate and the pump should be to deliver the daily dosage over an entire 24 hour period. If a pump and tank set is not available, hydrazine (and Condensate ControL) can be added to the system through a tank and flowmeter into the atmospheric drain tank. 

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