BWT Organic 3

BWT Organic 3 – Marine Low or Medium Pressure Boilers

BWT Organic 3 is a liquid blend of neutralised organic acids, corrosion scale and sludge conditioners for ship boilers.

This chemical product is designed for use in low or medium pressure boilers.

Polymer technology protects against scale, alkalinity is added to prevent corrosion and an organic compound is formed throughout the boiler to protect against corrosion.

Continuous dosing using a dosing pump is recommended.

It is also recommended to be used in conjunction with BWT Organic 4 which acts as an effective filming treatment on condensate lines.

BWT Organic 3 and BWT Organic 4 should not be mixed, so two separate dosing systems should be used.

Directions for Use

The boiler water should meet the following conditions

p-Alkalinity 150- 200ppm CaCO3

Chloride 100ppm max. for medium pressure boilers

Chloride 300ppm max. for low pressure boilers

pH 10.5 to 11.0

Conductivity 400-1000 micro Siemens/cm

Initial Dose 0.5 litre/metric  tonne of boiler water, then re-check dose to maintain pH and Alkalinity levels. 0.2 litres should be dosed/day to maintain treatment levels when combined with regular blow down.

Liquid Boiler Water Treatment Extra

Liquid Boiler Water Treatment Extra – generally used as a marine one-shot chemical treatment for Medium-Low Pressure Marine Boilers

pH, corrosion, scale and sludge controller for boiler water

Aquamarine Boiler Water Treatment is a combined concentrate liquid alkaline product that inhibits corrosion, controls alkalinity, controls hardness and oxygen. It is easy to use, non-hazardous and effective. It functions by neutralising acid conditions, precipitating salts, sludge conditioning and oxygen scavenging. For additional Oxygen Scavenger please see separate product details.

Boiler water additive for low/medium pressure boilers (up to 250 psi).

Aquamarine Boiler Water Treatment is fed into the water feed line by means of a continuous feed dosing pump.
Initial dose: 2.4 litres of Boiler Water Treatment/tonne in the boiler water system.


Please download a boiler water log sheet from the log sheet section on the CD or from our website Logs should be submitted monthly for analysis and a report will be sent out by the end of the month in which they are received.
Key parameters are PAlkalinity, Chloride and Sulphite
• Above 200 p.p.m. no dose is required but above 300 PAlkalinity p.p.m. blow down should be implemented
• Sulphite should be kept at 30-50 p.p.m or according to manufacturer’s guide-lines
• Chloride content should be controlled below a level of 200 p.p.m. (Above 200 – Blow-Down) Please ensure that all the test reagents are within the date on the bottle before using.

Feedwater Temperatures – Some typical issues
Temperature of the hotwell is too low. (The temperature should be kept between 70° – 80° C to reduce the oxygen content):
• Return condensate lines and make up line are fitted above the water level. (Tubes to be length under the water level to avoid oxygen intake) Hotwell covers open!
(steam cushion left)
• Temperature of hotwell is above the 90° C. ( Temperature must be kept maximum 90° C to avoid cavitation)
• Feed pump should be placed on the same level as the hotwell or one deck lower to avoid vapour formation in the pump Aquamarine BWT test kit is available for accurate system checking.

(see under Test Kits)

Pack Size 25 Ltr.

NSN J150 6850-99-834-9159 Product Ref. 0003