ALDOUS & STAMP

Nearly all of our inhibitors are in liquid form and can be injected into the water system by means of chemical injection pumps or chemical dosing pots. The dosing pumps can be controlled to deliver the treatment chemicals in proportion to water flow or on a timed programme. Dosing pots are simple pressure vessels, installed on a bypass across flow and return in a recirculating system, which allow manual additions of the treatment chemical.

The photograph (right) shows three of our standard range of chemical injection pumps, all of which are able to handle a wide range of chemicals and all of which can be mounted on a suitable chemical storage vessel - or mounted on a wall nearby the injection point and draw chemical from the container the chemicals are supplied in, or the special storage vessel, as you wish.

Photograph (left)

The standard range of dosing pots has four basic models - 5 litre capacity, 10 litre, 15 litre and 25 litre capacities. Each model is complete with tundish, non-return valve on fill port, inlet and outlet isolating valve, drain cock and manual air vent.

For heating systems running at very high water temperatures a sample cooler is needed  to enable the operator to check the water quality and adjust the inhibitor levels as necessary without fear of scalding and we do supply them. However, if used in the right way, a dosing pot can serve this purpose.

One problem with existing closed water systems is that of oxide contamination due to incorrect or no chemical protection. This type of contamination causes loss of efficiency, blockages and pump failure. Chemical cleaning  of the systems in occupied buildings is often not possible due to the health and safety concerns of the building employees, so an alternative method will be to install a dirt separator in the system. These steel vessels have no power requirement and only require minimal attention over the course of several weeks whilst the vessel collects sediment from the system. All the units have a drain facility that will require periodic bleeding to remove the solids. Correct chemical treatment will still be required to prevent reoccurrence.

An additional problem with older systems, also those again incorrectly treated and of poor design, is that of dissolved gasses. Air in systems can often be attributed to microbubbles, a condition caused by the heating of water or through the reduction in pressure. Microbubbles can result in persistent pump failure and increased corrosion. Versions of dirt separators with manual bleed vents are available and which are design to de-aerate the systems, to assist in the restoration of the system efficiency. Available in sizes up to 18” diameter, all models will collect sediment down to 10 microns.