Closed water systems such as heating and chilled water systems are prone to attack from slime forming bacteria and the effects of scale and corrosion. Both of these elements can reduce the efficacy and life span of closed water systems.
Guidance documents such as the BSRIA documents, the BG/29 / BG/50 and the British Standards documents BS7593 / BS8552 provide business users and service providers like us with the relevant information to ensure water systems are treated and maintained to a suitable standard. We can offer advice and solutions to business and private owners on how to best ensure that the water with their closed water systems is treated to provide efficacy and prolong the life span of the system and it associated items of plant.
Biocides are used to control the growth of bacteria within the closed systems which can effective the efficacy and life span of the system.
The three main bacteria’s to control are NRB ( Nitritre Reducing Bacteria ), SRB ( Sulphur Reducing Bacteria ) and Pseudomonas ( Slime Forming Bacteria)
The two main types of scale and corrosion inhibitors used in the water treatment industry are Nitrite and Molybdate.
Nitrite is a very effective scale and corrosion inhibitor as it passivates quickly onto the surface of the metals to ensure protection from the onset. Due to the aggressive nature of Nitrite is acts as a scraper and can lead to leaks in old water systems where protection has not been provided previously. Nitrite is usually used in District Heating systems and old water systems containing mainly steel and iron parts. Nitrite cannot be used in heating or chilled water systems containing Aluminium or Zinc as the Nitrite will eat through these soft metals and therefore produce leaks in the system.
Molybdate is an extremely effective scale and corrosion inhibitor as it unlike Nitrite it provides a film on the internal surfaces of the pipework therefore protecting the pipework from any further corrosion. It is also useful at protecting old systems where leaks can occur as the molybdate film can help reduces the risk of further leaking.
In summary by using the correct biocide and scale and corrosion inhibitor, heating and chilled water systems can remain efficient and have a longer life span therefore saving the customer on energy and repair bills.
Chemical Corrosion & Dosing Pump Supply
We supply an extensive range of the most efficient and cost-effective water treatment chemicals on the market to help keep your water systems safe and hygienic. We also supply automated dosing units that keep your water system protected with a controlled, accurate and consistent dose.
Our portfolio of top quality products includes:
- domestic water system products such as Shower Head Plus (cleans, descales and disinfects water systems) and hydrogen peroxide-based disinfectants (for pre-commission disinfection or legionella control).
- nitrite- and molybdate-based scale and corrosion inhibitors for closed heating and chilled water systems
- biocides for bacterial control in closed water systems.