chemical dossing pump

watr valley supply a range of high-quality Prominent solenoid dosing pumps & low cost Electromagnetic metering dosing pumps readily available for ordering online.

water valley chemical metering pumps are ideal for applications including water treatment chemical dosing, cooling tower biocide dosing, inhibitor dosing, pH control and adjustment, detergent dosing, swimming pool chemical treatment applications and many other commercial and industrial process applications.
Consumables including pump servicing parts are also available

chemical dossing pots

water valley range of high quality chemical dosing pots are manufactured to the highest quality standards and fabricated using seam welded tubes.

Each dosing pot incorporates an inlet, outlet and air purge valve making them ideal for a range of dosing applications.
Maximum operating pressure for dosing pots is between 10 – 12 bar.
Sizes typically range between 15-60 liter with other sizes available on request.
Chemical dosing pots are ideal ways to dose chemical into a pressurised closed water heating system, inhibitor chemicals are normally dosed as a percentage of system volume so it is important to keep this data on hand when calculating recommended chemical reserve.

automatic control system

we offer wide range of Controllers for measurement and proportional control of pH, Redox, Chlorine and conductivity.

our Controller series features is innovative Toroidal sensor technology. Toroidal sensors are not susceptible to fouling and eliminate the need for routine cleaning and calibration. The controller comes standard with selectable timer, Dry contact/ Hall Effect water meter input, dual biocide with pre-bleed, lockout, inhibitor interface, and four programmable start times per biocide, 4-20mA output, dry contact alarm output and 3 drum level inputs.

Preventing Boiler Corrosion

is done through the removal of oxygen and maintaining appropriate alkalinity levels in the boiler water to prevent acid attack.
As shown in the chart oxygen levels are tied to the Hot well feed water temperature with nearly all oxygen gone by the time the water reaches 100oC. For this reason, we recommend keeping the temperature above 80oC and incorporating an Oxygen Scavenger such as water valley high-quality Sulphite or Tannin blends featured above. This will help maintain excellent boiler corrosion control and limit the potential for oxidation.
The other risk in an industrial boiler is acid attack which is caused by insufficient levels of alkalinity. Alkalinity naturally builds in a boiler as cycles of concentration increase and in many cases, a bespoke treatment plan will include additional alkalinity builders with a maximum recommended limit of 1200ppm (M Alkalinity) in a Shell boiler running at TDS of 3000ppm. Alkalinity Builders are available as separate chemicals or as part of our Multi-functional Boiler Treatment detailed below.

Multifunctional Products

You may also want to look at our range of Multi-functional Products which combine the oxygen scavenger with a polymer sludge conditioner & alkalinity builder to create a single easy to use liquid to simplify dosing and control.

Boiler Scale Inhibitor & Sludge Conditioning Products


provides two kinds of scale inhibitor
– Polymer only and Polymer Phosphate,
the latter of which is the required option under the following conditions:
⦁ Phosphate must be used in boilers operating at pressures above 19 bar (150 psi)
⦁ The ‘natural’ Alkalinity of the make-up after sulphite addition is less than 20% of the TDS or make-up is dealkalised
⦁ Or when the make-up water is not efficiently softened
Polymer Phosphate treatment regimes precipitate magnesium & calcium hardness salts from boiler make-up water in the form of hydroxyapatite and serpentine. These compounds form sludge, which, when properly conditioned with polymers, is removed from the boiler during blowdown. When a significant excess of soluble orthophosphate and free hydroxide (caustic) alkalinity is maintained in the boiler water, calcium carbonate formation can be virtually eliminated. Polymeric dispersants or sludge conditioners are added with the phosphate to condition the sludge for improved removal from the boiler. boiler phosphate treatment.

Multi-Functional Treatment Products

Multi-functional Boiler Water Chemicals provide the advantage of containing a blend of essential treatments such as an Oxygen Scavenger, Polymer Treatment & Alkalinity Builder to provide a multi-treat solution, this may mean they can be dosed exclusively but in many situations, they may still need to be supplemented by

a Phosphate and Amine Treatment. If your application requires treatment with DEHA or Carbohydrazide these can be found on the Oxygen Scavenger category.
A Steam Boiler treatment program should always include an oxygen scavenger and polymer treatment. It is typical to also include a phosphate treatment especially in applications above 10 bar (150 psi). While it is always necessary to control the alkalinity, where the makeup water is reliably softened the regular use of an alkalinity builder may not be necessary.

Boiler Condensate Protection Products

Where a Condensate Return System is installed your boiler water treatment regimen will need to include preventative measures to protect the condensate line from corrosion. The two main causes of condensate line corrosion are Carbon Dioxide Attack which results in the uniform loss of metal below the water line and Oxygen Attack which results in local pitting. Both of these corrosive attacks can be prevented by the removal of these gases through effective water treatment and mitigation of their effects through the use of Amines. Be aware, the lack of suitable treatment will cause damage and failure of plant equipment.

Removing Oxygen from the boiler is done by two steps, firstly the hotwell feed water temperature should be kept above 80oC as this will remove the majority of oxygen dissolved in solution. The second step is to treat the water with an Oxygen Scavenger such as Tannin or Sulphite which will remove the remaining O2. Where oxygen removal is not possible the use of a Filming Amine will create a protective barrier against the metal within the condensate line preventing oxidation.
Removing Carbon Dioxide is more difficult which is where the dosage of a steam volatile Amine is recommended, this can be by a Filming Amine which creates a thin film barrier on the surface of the metal or a blend of Neutralising Amines which raise the pH of the steam and react with the carbonic acid neutralising it through the generation of hydroxide ions.

Cooling tower system inhibitors

Each of these popular inhibitors is a multifunctional blend which includes both scale and corrosion inhibitors for steel, copper and brass as well as polymer dispersants to prevent fouling, these provide powerful treatment to inhibit scale or corrosion but do not contain a bromine precursor.

Water Corrosion or Scale deposition tendency

Professor Langelier’s research, complete in 1936, defines conditions in which water is balanced with calcium carbonate, making it possible to predict the likelihood of a given water to either precipitate or dissolve calcium carbonate. Being the universal solvent that it is, if water is out of balance, it will seek to find its own equilibrium (0.0 LSI.) in the case of swimming pools, water can even draw calcium out of the plaster that lines the pool walls,  or in industrial systems draw from the protective coating on pipework at an LSI of -0.5 LSI and below. In the case of over-saturation eg. >0.5 LSI the water will become scale forming.
The relationship between the actual pH of a water sample and the pH at which it is just saturated with calcium carbonate (pHs) is called the Langelier Saturation Index (LSI) and is equal to (pHs – pH).
However, the way in which the LSI is calculated, two different waters; one having high levels of hardness (scale forming), and the other with low level of hardness (corrosive) could theoretically have the same Langelier Saturation Index (LSI) due to the effects pH, Alkalinity and Temperature have on the calculation. For this reason we reach for the Stability index developed by Ryzner (RSI) which goes further and distinguishes between two waters based on an index of actual operating results with waters of various LSIs.
The RSI pf water is calculated by: 2 x pHs – pH

Cooling tower system inhibitors

Our most popular Biocides & Disinfectants

Cooling Water Dispersant Products

Water valley range of cooling tower dispersants are highly effective at removing fouling by microbiological slime and are best incorporated into a treatment regime with a biocide such as chlorine or bromine for cleaning cooling towers to ACoP L8 standard.
Accepta recommends incorporating the Bromgard cooling system treatment range which brings together the latest scale, corrosion and fouling control technology with the biocidal power of bromine for applications in the widest possible range of cooling water systems

Foam Cleaning

For cooling towers where pack removal is too difficult Activ-Ox Foam Cleaner may be suitable, the high cling foam gives a deep clean disinfecting and descaling lightly fouled tower packing.
The high-cling foam cleaner includes acid products for descaling and alkaline products for removing organic fouling and general soiling. We have also incorporated Activ-Ox®, our patented chlorine dioxide system to provide powerful surface disinfection and biofilm removal, incorporated together these products offer exceptional cleaning power which is why Activ-Ox foam clean is used by extensively by cooling tower cleaning teams across the UK and abroad

Need Help ? Contact Us

Reducing Corrosion & Scale Risk in Closed Systems

There are multiple factors which can increase or decrease the risk of scale or corrosion within a closed water system most of which are briefly detailed below, summarised from BSRIA:
Corrosion factors:
⦁ Dissolved Oxygen – most important factor to govern corrosion
⦁ Dissolved Carbon Dioxide – can cause a reduction in pH
⦁ pH – pH below 7 may see rapid corrosion (Aluminium corrosion can occur at high pH so treatment program should be limited to pH of 8.5)
⦁ Temperature – higher temperatures tend to increase rates of corrosion
⦁ TDS (Total Dissolved Solids) – high conductivity aids certain corrosion processes
⦁ Galvanic – Aluminium & Copper corrosion due to ‘electrochemical potential difference’
⦁ Sulphates – high levels can increase corrosion, additionally, sulphate ions may be consumed by SRBs (Sulphite Reducing Bacteria) to cause pitting
⦁ Bacteria – risk of corrosion from aerobic & anaerobic bacteria
⦁ Chloride attack – high levels can interfere with the development of protective oxide films on surfaces
⦁ Flow Velocity – turbulent erosion on softer metals (low risk)
⦁ Surface Condition – dirt & contamination may encourage localised corrosion
⦁ Stress – stress-corrosion cracking

Note on Aluminium: Closed systems containing aluminium are considered high risk due to the potential for galvanic corrosion, the decision on chemical treatment should be carefully considered as it may require specific inhibitors and a higher than typical dosage to maintain adequate protection. Accepta recommends Accepta 2309, a Synergised Molybdate treatment for these systems, a link to this product page is listed in the table above.

Note on Hard Water: The permanent or temporary installation of a water softener may be required where the available water is quite hard and especially where there are lots of leaks as these can leave abrasive evaporation deposits & form scale. Please note, the make-up water should not be entirely softened as the total removal of calcium can make the water more corrosive. However, be aware an underused water softener may become a source of bacterial contamination and may not be ideally suited for applications where it’s sole purpose is the supply to the closed system.

The use of Scale & Corrosion inhibitors

A closed system inhibitor works by laying down a thin film over the surface of the system metal and should be chosen carefully taking into account suitability for all materials used within the system, a guide on Accepta products is available above by selecting ‘sort by system materials’. It is important that the recommended chemical reserve is maintained in the system to cover for a minor loss of water within the system, or general degradation and absorption of chemical within the heating system, the aim is to only require occasional chemical top-ups.
pH is generally kept within a range of 8 – 11 to promote a less corrosive environment however as noted above systems with aluminium should be kept around 8.5 as the metal is known to corrode at higher pH levels.
For more information and expert advice please contact us.
WATER VALLEY also recommends the advice offered in the BSRIA closed heating system guide which can be .

Industrial Cleaning & Descaling Products

Pre-Commission Cleaning Chemicals