Description

KEM-FOS-L is a liquid compound containing alkaline mineral salts, sequestering agents and inorganic corrosion inhibitors which provide scale and corrosion inhibition for low pressure boilers.

Application

KEM-FOS-L is suitable for all auxiliary boilers, waste heat units, low-pressure water tube boilers, smoke and water tube boilers, steam/steam generators etc.

Advantages

KEM-FOS-L is a complete boiler water conditioner, inhibits corrosion due to traces of free oxygen in feed water, dissolved hardness salts of Ca and Mg contained in feed water, converts potential hard scale - forming salts to inert, non adhering soft sludge particles which are kept in suspension. The balanced alkalinity supplied by KEM-FOS-L assures the correct environment for the precipitation of hardness salts, the proper conditions to maintain silica in solution the appropriate amount of alkalinity to prevent corrosion.

Usage

For an untreated system an initial dose of 2,5 liters of KEM-FOS-L per 1000 liters of untreated water is recommended. Thereafter the dosage rate of KEM-FOS-L is based on ''P'' alkalinity measured in ppm of CaCO3.

The following chart indicates the appropriate amount of KEM-FOS-L to be added (the mid point value is circled).

''P''Alkalinity ppm CaCO3      0        50     100     150     200    225    250    300    350    400

KEM-FOS-L L/1000 L              2,5     1,9     1,3      0,7      0,2        0        0        0         0      BLD

KEM-FOS-L is best fed continuously to the boiler feed water by means of a metering pump.

The recommended control limits are:

• p-Alkalinity: 200-300 ppm CaCO3.
• Chlorides: 200 ppm Cl max.
• Condensate: pH 8.3-9.0.

Blowdown (BLD) and scumming operations must proceed at regular intervals to remove sludge/sediment particles. Excessive chlorides are removed by blowdown.

The testing equipment to measure bo trol treatment with KEM-FOS- is available from EUROCHEM S.A.