Hydraguard has many years experience supplying boiler water treatment products to a number of heritage railways and 'main line' steam locomotives around the UK, as well as industrial boilers.
BW150 is a tannin based formulation used for controlling scale and corrosion in boiler systems.
There are two distinctive application areas:-
• Closed hot water systems e.g. MPHW installations
• Steam locomotives
Can prevent scale in the presence of hardness slippage due to softener malfunction.
• Easy to control and test for product
• Inhibits the formation of scale
• Low alkalinity content to allow for increased cycling in the boiler
• Provides control of corrosion due to oxygen in the water
How much to use
Precise requirements vary according to water quality. As a guide, for a closed system containing raw water an initial dose of 10 litres per 10m3 of system volume is recommended.
Maintenance treatment depends on the make up rate; as a guide use 0.5 –1 litre per 10m3 to achieve the correct Tannin index.
An initial dose of 5 litres per m3 is suggested. Maintenance treatment depends on the operating pattern of the locomotive. As a guide use 250-500ml per m3 of make up.
TESTING AND CONTROL
The product should be controlled to maintain the following levels:
pH: 10-12 Tannin Index: 12-16 in closed systems. Then as stated for steam locomotives it is recommended to maintain the Tannin Index at 6-9.
Antifoam is a chemical used to reduce foaming in high output steam boilers. The use of antifoam in small doses has the following advantages:
antifoam data sheets
SCL is a powdered substance used to maintain the high pH in steam locomotive boilers that is required.
SCL data sheets