NOVACHEM OXYGEN SCAVENGER - S is an oxygen scavenger based on sodium sulphite blended with a specially selected catalyst which will effectively speed up the reaction of the sulphite with dissolved oxygen even at low temperatures. NOVACHEM OXYGEN SCAVENGER - S is the ideal oxygen scavenger for all water tube boilers operating below 60 atmospheres (850 psi)

Purpose :

Even with most modern deareation equipment, trace amounts of dissolved oxygen are found in the feed water. This dissolved oxygen will react with the boiler metal and the tubes to cause corrosion and subsequent failures. NOVACHEM OXYGEN SCAVENGER - S was formulated to remove these minute traces of dissolved oxygen. The fast reaction rate of our special catalyst makes NOVACHEM OXYGEN SCAVENGER - S particularly useful in systems where the boiler feed water temperatures are low or in cold water system. It is excellent in use in standby boilers for the prevention of standby corrosion.

Advantages :

1. Convenient ready to use liquid & can be mixed with most treatment chemicals.
2. No carbon dioxide releases as with soda ash.

Feed Requirements :

Feed solutions should be prepared with a minimum of stirring. This solution can be fed alone or in with other treatment chemicals not affected a reducing agent. Approx. fifty liters of NOVACHEM OXYGEN SCAVENGER - S will be required to chemically react with one part of dissolved oxygen.

Method Of Feeding :

NOVACHEM OXYGEN SCAVENGER - S should be fed continuously for best results to the storage section of the deareator or to the make-up tank. This will ensure a residual in the feed water system as well as boiler at all times, even when make-up requirements are higher than normal. A lid will help to prevent reaction with atmospheric oxygen & outlet should be above bottom of tank and preferably equipped with fine screen strainer.

Control & Dosage :

NOVACHEM OXYGEN SCAVENGER - S is controlled by the sulphite test .A free residual of 30 to 60 ppm is normally maintained in the boiler water. A standard titration is used for checking.
NOVACHEM OXYGEN SCAVENGER - S needed to build desired free Sulphite reading ppm asSO3
NOVACHEM OXYGEN SCAVENGER - S in ml / 1000 ltrs.

..............................below 42 kg/cm2 (600 psi)......... 42-63kg/cm2

5 – 10ppm............................. 350 200

10 – 20ppm........................... 250 125

20 – 30ppm........................... 150.......................................... None

30 – 50ppm.......................... None........................................ None

1. Determine sulphite as ppm SO3 in boiler water by testing.
2. Find sulphite range in the table that contains the measured free sulphite residual ( ppm SO3)
3. Read the ml of Oxytreat-s needed per 1000 ltrs ( or per metric ton )under the appropriate pressure column.