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    Chemicals For Closed Systems

    Chemical water treatments to protect closed-systems.

    Resolving Common Closed System Problems

    At B & V Chemicals, we understand the challenges industries face when using closed water systems. Problems such as corrosion, suspended solids, scale deposits, and microbiological contamination can impact water quality, equipment performance and compliance. We’ve developed a range of chemical treatments to resolve these issues effectively.


    Closed System Chemical Treatments

    We offer several chemical treatments for closed water systems, including:


     

    The Benefits of Using Chemicals in Closed Systems

    They can handle higher doses

    Due to the fixed volume and low make-up of closed systems, you can use treatments with a higher concentration.



    Better corrosion control

    Using a higher concentrated inhibitor means more substantial and longer corrosion resistance. 



    Low dissolved oxygen levels

    Closed systems often have low dissolved oxygen levels, which aids with the control and prevention of corrosion.

     

    Better microbiological control

    You can take advantage of higher biocide levels and longer contact times, which help control and maintain minimal microbiological levels.



    Minimal scaling

    Unless there is a substantial make-up, scaling is generally not a problem with closed systems.

     

    Our Range of Chemical Treatments

    For Closed system Inhibitors

    These include multi-metal inhibitors, which are suitable for systems containing aluminium.

    Product code Application Composition Benefit
    BV206 Multi-metal corrosion inhibitor for soft water systems Molybdate and phosphate based Ideally suited to soft water systems. Does not contain nitrite.
    BV589 Multi-metal corrosion inhibitor Blend of corrosion inhibitors Extremely cost effective formulation. Suitable for hard and soft water.
    BV1048 Multi-metal corrosion inhibitor. Molybdate + Blend of corrosion inhibitors BuildCert approved. Does not contain Nitrite or Boron based additives Suitable for hard and soft water.
    BV1520 Multi-metal corrosion inhibitor Nitrite and molybdate based formulation. Economical in use. Excellent buffering capacity. Suitable for hard and soft water.
    BV1721 Multi-metal corrosion inhibitor Molybdate / Nitrite First choice multi-metal inhibitor providing fast passivation, enhanced scale inhibition and improved pH buffering capacity.
    BV982 Multi-metal corrosion inhibitor Molybdate, Borate, and Silicate Suitable for Multi-Metal systems including those with Aluminium.

     

    Corrosion Inhibitors Unsuitable for Aluminium

    These include multi-metal inhibitors not suitable for systems containing aluminium.

    Product code Application Composition Benefit
    BV205 Nitrite based inhibitor 0.5% dose rate. Nitrite and borate Economical concentrated formulation. Excellent corrosion control for steel, cast iron, copper and brass
    BV550 Biostable formulation. Molybdate and borate Excellent corrosion control for steel, copper and brass. Contains a low level of nutrients (no phosphate or nitrite), thus the product does not encourage microbiological growth,
    BV653 High conc. product. Blend of corrosion inhibitors Concentrated formulation. Dose 0.1% to chilled systems and 0.2% to LPHW systems. An effective corrosion inhibitor for systems containing steel and 'yellow metal' components
    BV889 High conc. product. Nitrite and molybdate based Concentrated formulation. Excellent corrosion control for steel, cast iron, brass and copper
    BV1710 Nitrite inhibitor with indicator Nitrite based blend Economical concentrated formulation. Excellent corrosion control for steel cast iron, copper, and brass with phenolphthalein indicator.

     

    Polyamine Inhibitors for Closed systems

    Learn more about our polyamine inhibitors or view our helpful blogs on the topic:

     

    Product code Application Composition Benefit
    BV1725 Closed circuit systems, heating and chilled. Suitable for aluminium. Blend of Polyamines Blend of amines for corrosion and scale inhibition in closed circuit systems. Suitable for heating and chiller systems. Provides corrosion protection for steel, cast iron, copper, brass and aluminium. Helps prevent scale deposition. Dose 0.8-1.2L/m3.
    BV1723 Closed circuit systems, heating and chilled. Not suitable for aluminium. Blend of Polyamines Blend of amines for corrosion and scale inhibition in closed circuit systems. Suitable for heating and chiller systems. Provides corrosion protection for steel, cast iron, copper, and brass. Not suitable for aluminium. Helps prevent scale deposition. Dose 0.8-1L/m3.
    BV1722 Older closed circuit systems where a progressive clean is required prior to preventative treatment. Blend of Polyamines Blend of amines for corrosion and scale inhibition in closed circuit systems. Recommended for use in older systems where a progressive clean is required prior to continuous dosing with preventative treatment. Contains a high level of iron chelators, as well as dispersants to mobilise existing iron deposits. Suitable for heating and chilled systems. Provides corrosion protection for steel, cast iron, copper, brass and aluminium. Helps prevent scale deposition. Dose 3-5L/m3.

     

    Closed System Biocides

    Microorganisms in closed systems can lead to the rapid buildup of bacteria and biofilm in the pipework, causing low efficiency, flow restrictions and corrosion deposits. 

    Managing biocides in closed systems with the right water treatment is more cost-effective and reliable. View our range of biocide products below and learn more about them here. 

    Product code Application Composition Benefit
    BV105 Suitable for the protection of neutral pH systems. BNP A broad-spectrum bactericide. Low toxicity. Effective over a pH range of 6.0 to 8.0. Stable up to 40°C.
    BV254 For flushing and system protection. Suitable for the protection of neutral and alkaline pH systems. THPS A broad-spectrum product, very effective against SRB’s. Effective over a broad pH Range 3 -10. Stable up to 60°C.
    BV585 For biocidal flushing and system protection. Can be dosed with high pH inhibitors Proprietary Low toxicity. Very stable biocide for use with high pH nitrite based inhibitors. Excellent against Pseudomonas ssp. Optimal biocidal activity after 24 – 48 hrs contact. Effective over a pH range pH 8.0 to 11.0. Stable up to 80°C. Test kit available.
    BV595 For flushing and system protection. Suitable for the protection of neutral pH systems. ITA/BNP blend Very effective against NRB’s Effective over a pH range of 6.5 to 8.5. Stable up to 50°C.
    BV1507 For flushing and system protection. Suitable for the protection of neutral pH systems. Glutaraldehyde Has a broad spectrum of activity against bacteria and their spores, fungi, also effective against sulphite reducing bacteria (SRB) Effective over a pH range pH 6.5 to 9.0. Stable up to 60°C. Rapid biocidal action.
    BV1532 For flushing and system protection. Suitable for the protection of neutral pH systems. ITA blend Does not contain copper stabiliser. Effective over a pH range of 6.5 to 8.5. Stable up to 50°C.
    BV1528 For flushing and system protection. Suitable for the protection of neutral pH systems. Proprietary A highly effective non-oxidising biocide containing a synergistic combination of biocides. Ideal for use in closed circuit systems. Effective against, Pseudomonas spp and Sulphate-reducing bacteria. Effective over a pH range of 6.5 to 8.5. Stable up to 50°C.

     

    Antifreeze Products

    When temperatures get as low as 0°C or below, antifreeze products prevent recirculating water in chilled systems from freezing. 

    In closed systems with 25% glycol or above, the biostatic effect of the glycol prevents bacterial growth. If the concentration falls below 25%, glycol feed bacteria, producing acidic by-products that lower the pH of your water system and accelerate corrosion so addition of a biocide should be considered. 

    Product code Application Composition Benefit
    BV69 General purpose inhibited antifreeze Mono ethylene glycol molybdate based multi-metal inhibitor Contains a low toxicity corrosion inhibitor formulation + mono ethylene glycol. Dose at 25% system volume to obtain optimal freeze protection and corrosion control.
    BV70 General purpose antifreeze Mono ethylene glycol 25% Monoethylene Glycol will reduce the freezing point of water down to -11 to -12°C.
    BV134 Food grade antifreeze Mono propylene glycol Low toxicity product. 25% Monopropylene Glycol will reduce the freezing point of water down to -11 to -12°C.
    BV133 Food grade antifreeze + inhibitor Mono propylene glycol + ‘food safe’ inhibitor Contains a low toxicity corrosion inhibitor formulation + mono propylene glycol. Dose at 25% system volume to obtain optimal freeze protection and corrosion control.

     

    Pre-Commission Cleaning and Flushing Products

    With systems more susceptible to blockages, pre-commission cleaning of hot water heating systems and chilled systems is essential. 

    System contaminants such as mill-scale, jointing compounds and fabricating debris must be removed by chemical cleaning and high velocity flushing, allowing the ongoing water treatment regime to effectively prevent corrosion and microbiological fouling. Older systems that have accumulated deposits due to a lack of the correct water treatment can be cleaned by a similar method.

    Our range of specialist, effective pre-commission cleaning, biocidal flushing and system flushing chemical formulations is outlined below:

    Product code Application Composition Benefit
    BV140 Pre-commission cleaner Blend of cleaning and dispersing agents Effectively removes oil, grease and flux residues, disperses light iron oxide deposits. Contains nitrite to passivate bare metal surfaces
    BV141 Very low toxicity biodegradeable pre-commission cleaner An aqueous solution of surfactants, polymers and organic oxygen scavenger. Low toxicity formulation, formulated as a pre-commission cleaner for use on sites where there are restrictive discharge limits
    BV398 Pre-commission & system flush An aqueous blend of chelants, dispersants and wetting agents. Versatile formulation. Suitable for systems of all ages. Excellent removal of corrosion deposits. Very effective pre-commission cleaner and system flush formulation.
    BV590 Pre-commission & system flush An aqueous blend of chelants, dispersants and wetting agents. Versatile formulation. Suitable for systems of all ages. Excellent removal of corrosion deposits. Very effective pre-commission cleaner and system flush formulation.
    BV850 Pre-commission cleaner A concentrated solution of phosphonate, polymers, chelant and wetting agent. Heavy duty concentrated pre-commission cleaner. Removes oil, grease and flux residues, disperses light iron oxide deposits
    BV1455 On-line cleaner for closed circuit systems A blend of cleaning and dispersing agents with an effective biodispersant. As this product lifts and mobilises system contaminants including biofilm it should only be used in conjunction with in-line or side stream filtration. Cleans and passivates bare metal surfaces, preventing under deposit corrosion and prolonging system life. Compatible with our full range of closed circuit water treatment LPHW and Chiller formulations.

     

    Specialist Closed System Products

    We know some systems require a unique treatment or formulation. If you cannot find the treatment you require below, please contact the B & V Chemicals team.

    Product code Application Composition Benefit
    BV5 Closed Circuit Antifoam Mineral oil based antifoam Used to control foaming in closed systems. Very concentrated formulation
    BV1049 On-line Descaler A blend of polymers and sequesterants Removes the scale responsible for 'kettling' and poor heat transfer. Restores heat transfer efficiency. No system shut down required
    BV167 Biofilm Dispersant Applications include oil removal in cooling towers and biofilm removal in closed systems. Contains a low foaming surfactant. Compatible with anionic and cationic species. Use in conjunction with an appropriate biocide. Biofilm removed from pipework surfaces will be removed so the system must be assessed prior to use to ensure that dislodged biofilm can be removed from the system efficiently.
    BV491 pH adjuster and buffer supplement used to decrease the pH in closed circuits where Aluminium is present. A combination of acidic components and buffer Specialist additive for lowering the pH of alkaline solutions to below pH 8.0 in order to ensure optimal corrosion protection of aluminium.
    BV891 High conc. Neutral product. Nitrite based Neutral nitrite additive designed to be added to multi-metal systems where the nitrite component of the inhibitor has been degraded by microbial action.
    BV916 Concentrated azole Supplement Suitable for use in closed water systems. An aqueous solution of azoles. A very high strength solution of benzotriazole. Systems that have a very large surface area of copper may need additional copper corrosion inhibitor.Neutral formulation so addition of this azole supplement will not affect system pH.
    BV455 Concentrated azole Supplement Suitable for use in closed water systems. An aqueous solution of azoles. A very high strength solution of benzotriazole. Systems that have a very large surface area of copper may need additional copper corrosion inhibitor.

    For further advice on product selection, problem-solving solutions, and chemical compatibility with your water systems and formulations that are already in use, please get in touch with the B & V Chemicals team.

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    Supply Partners

    HuwaSan specialise in the production and distribution of chemicals for water treatment. B & V Chemicals are water treatment supply partners in the UK.

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    01327709439
    Ownlabel@bvwater.co.uk
    Lamport Drive,
    Heartlands Business Park,
    Daventry, Northamptonshire NN11 8YH

    B & V Chemicals is a trading name.
    Registered in England and Wales Number 05300448. VAT Registration Number 887722080.

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