Photos I and II: Show the inside of a chiller condenser, where the rivets have been corroded away, allowing the main diversion plate to fall off. There is also advanced corrosion of the coil frame-work and a build-up of rust sediment and scale within the heat-exchanger.

Many chiller failures can be attributed to the use of uninhibited glycol. Specifically standard Mono Ethylene and Mono Propylene Glycol (without multi-metal inhibitors*) can actually generate galvanic action leading to corrosion and failure. Blockage from scale and algae build-up can also occur without inhibitors.

* Borax is often quoted as a corrosion inhibitor (within MEG), but only counteracts the acidity of the glycol as it becomes spent - not as a pro-active corrosion inhibitor. Neither technical nor pharmaceutical grade MPG contain corrosion inhibitors.

When specifying MEG or MPG anti-freeze, frost protection is the primary objective and the need for corrosion protection is often overlooked. However most engineers and plant managers would agree, that treatment of closed loop systems is preferred practice.

For a few extra** pence per kilo it is possible to install a fully inhibited CoolFlow product.

**Depending on your current purchase price, Hydratech inhibited glycols may even be less expensive.

To ensure your investment is properly protected, prevent costly down-time and maintain production schedules, it is recommended that inhibited coolants are used for all chilled water systems.

Hydratech formulate, manufacture and market CoolFlow, Thermox and Solaris inhibited glycols and coolants for use within industrial, commercial and domestic systems. These products incorporate synergistic inhibitors to help prevent corrosion, scale and biological fouling.