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Boiler Feed

Puretech Water Systems (UK) Ltd provides a wide range of reverse osmosis and water softening plant for boiler feed supply.

With rising energy and water costs many estates and building services managers are looking for ways of controlling their budgets.

Over the past 10 years there has been a steady increase in the number of sites investing in reverse osmosis technology to serve their steam boilers.

By installing a reverse osmosis plant it provides the steam boiler with purified water containing very low levels of conductivity. Most steam boilers are blown down on the level of conductivity contained within the chamber, typically a blow down set-point is around 2500 microsiemens.

Incoming mains water conductivity ranges across regions, on average it can be anything between 350 to 750 microsiemens. A reverse osmosis plant will lower these levels of conductivity levels by around 95% – 99%, providing the steam boiler with purified water typically containing around 10 to 30 micosiemens.

The benefit here is that the steam boiler will take allot longer to reach its blow down set-point therefore reducing the number of blow downs required. This saves energy costs to re-heat the boiler, reduces the volume of water required therefore creating further savings and environmental benefits and finally reducing the amount of boiler chemicals required.

We can design bespoke systems as well as offering water softeners and reverse osmosis plant from our existing comprehensive portfolio.

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Our System

How does Reverse Osmosis work?

Reverse Osmosis is a high-pressure water process which forces water to be treated through a semi permeable reverse osmosis membrane. The membrane has two outlet channels. One being the permeate water (Purified) which passes the heavily filtered water onto the point of use application. This purified water typically has around 98% of the incoming contaminants removed, such as dissolved salts, bacteria, organics and pyrogens. The other outlet is where the rejected water (Concentrate) is sent directly to drain, or in some cases this concentrate water can be re-circulated back to the front of the reverse osmosis plant and re-processed to reduce water wastage.

What is a Water Softener?

A water softener is used to remove hardness from the incoming towns mains water supply. This is achieved by removing the calcium and magnesium ions which would otherwise cause scaling within a water system. Scaling can present itself in many ways, some of the most common are scaling of water heaters reducing their ability to heat water efficiently, scaling on glassware such as shower screens and glasses, scaling on tap outlets and scale build up within water holding tanks.

A water softener removes the calcium and magnesium ions and traps them on its filter surface which acts as a magnet. It then exchanges these calcium and magnesium ions for sodium ions which then creates soft water which exits the water softener ready for consumption.

Benefits of Reverse Osmosis water systems

  • Reduced levels of conductivity on water entering the boiler
  • Savings on energy costs
  • Reduced chemical consumption
  • Reduced risk of scaling
  • Reduced water consumption