Expansion Tanks & Pressurisation Systems

Control of the internal pressure within heating, cooling and HVAC systems is critical to their efficient operation and longevity. Traditional expansion tanks allow air to become dissolved in the water which has implications on corrosion and sludge accumulation. Duraflex expansion tanks and pressurisation systems work differently, a diaphragm seals the interface between the two phases and prevents any interchange while maintaining control over the pressure and expansion. For high pressure or larger volume systems, the pressurisation is achieved using a separate expansion vessel and providing highly accurate control with any pressure changes kept to an absolute minimum.

Deaerators and Dirt Separators

Air is the enemy of any water based heating or cooling system. Without air, the closed system will operate smoothly and without rust or sludge. Introducing some atmospheric gasses puts oxygen into the equation. Oxygen is a major constituent of rust and other corrosion by-products and keeping it absent is key to preventing corrosion from occurring in the first place. Corrosion also produces sludge which causes similar problems for the equipment and pipework.

Our products tackle the problem from two angles. Dirt and air separators allow any accumulation of air and sludge to be bled or decanted off respectively. The vacuum degassing effect of the deaerators attacks the issue at source by removing all the oxygen and preventing the reaction in the first place.

Backflow Prevention

AS3500 National Plumbing and Drainage Code stipulates conditions for backflow prevention to prevent contamination in certain applications such as medical and food preparation. Our Reduced Pressure Zone (RPZ) devices and Backflow Prevention equipment with automatic refilling are both Australian made and serve these purposes perfectly. Contact Automatic Heating for further information.