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CAT. SULPHITE L 25 LTR

_Product Code

Product group:
655
Product number:
575662

NALFLEET™ Cat Sulphite™ is a liquid Oxygen Scavenger based on Sodium Sulphite.

Product information

Oxygen is highly corrosive in the boiler system, even in small amounts and can create severe corrosion, shown as deep and local pitting which will quickly cause failure of the boiler metal. The catalyst in Cat Sulphite ensures rapid elimination of oxygen in the boiler system. Elevated temperature operation of the hotwell is a good practice to remove gases like oxygen.

NALFLEET™ Cat Sulphite™ should be used in conjunction with other Nalfleet boiler water treatment products.

Features

  • Concentrated liquid product
  • Catalysed product for very rapid removal of oxygen
  • Reacts at low temperature
  • Simple control test
  • CSL should be dosed seperately from other boiler water treatments

Benefits

  • Protects the boiler from oxygen corrosion
  • Approved for use where steam can contact food

Specification

Physical properties

Appearance Pale pink
Density [g/ml] 1.3
Form Liquid
pH 4 in 10% solution

Technical data

Not Compatible May corrode metal.

SDS

Directions for use

NALFLEET™ Cat. Sulphite L (CSL) is a fast acting oxygen scavenger for use in ships boiler system in conjunction with other Unitor boiler water treatment products. High feedwater temperature should be maintained for optimum product performance, reduced product consumption and optimum system protection.

Dosing method

For optional results NALFLEET™ CSL should be dosed continuously by means of a metering pump into the feed line, after the recirculation valve. NALFLEET™ CSL can be fed using the BWT dosing system. Slug dosing into the hotwell as well as low hotwell temperatures will strongly reduce the efficiency of this treatment. NALFLEET™ CSL should be dosed seperately from other boiler water treatments.

Dosage and control

The quantity of NALFLEET™ CSL required depends on the operation of the boiler system. As a guide 10 ppm sulphite is required to react with 1 ppm oxygen. Please refer to the table below for control limits with respect to boiler operating pressure.

SULPHITE TEST RESULT ppm

Boiler Pressure

Control Range

       0-20ppm

20-50ppm

     50-70ppm

70-100ppm

100-120ppm

<18 bar

50 - 100ppm

Increase dose 25%

Increase dose 25%

Satisfactory Maintain dose

Satisfactory Maintain dose

Decrease dose 25%

18 to 31 bar

30 - 70ppm

Increase dose 25%

Increase dose 25%

Satisfactory Maintain dose

Decrease dose 25%

Decrease dose 25%

31 to 42 bar

20 - 50ppm

Increase dose 25%

Satisfactory Maintain dose

Decrease dose 25%

Decrease dose 25%

Decrease dose 50%

Sampling and testing

A representative sample of boiler water should be drawn for analysis daily. Samples should be taken after blowdown, cooled and tested immediately. Samples should always be taken from the same location.
Follow the test kit instructions and log the results in Waterproof. The results should be sent to WSS as stated in the Waterproof instructions.
It is important that regular testing is carried out to ensure that treatment levels are maintained within correct chemical limits.