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Danfoss AVTA valve

The fit and forget valve keeps up with the play

14 December 2007
The self-acting AVTA valve has been a customer favourite for almost 60 years. Predominantly used in cooling applications, the valve’s continual development has given customers better choice and performance for their applications.

Reliable old friend in a hi-tech world

Often referred to as the ‘fit and forget’ valve due to its proven reliability, the AVTA valve has many benefits:
  • It avoids over-consumption of cooling water, or hot water and steam from heating systems
  • It needs no power supply
  • It’s insensitive to dirt and water pressure, making it extremely robust
  • It’s easy to install
Commonly used in hydraulic power stations (Power Packs), the AVTA valve maintains the oil at a fixed temperature of 50°C. This is essential work, because if the temperature rises above 50°C, the oil will start to break down – making it unfit for use.

The AVTA valve is also used in the production of microchips. Since the 1980s, billions of chips have been produced – and there are usually about two hundred vacuum pumps in each factory maintaining pressure in the tanks. The AVTA valve helps the pumps stay at the correct temperature (with a variance no greater than +/-2°C). Again, this work is essential – if just one pump fails, the whole batch of chips has to be discarded.

Just as the variety of applications has developed over the years, so too has the AVTA valve. It is now available in de-zincification resistant brass, as well as acid-proof stainless steel to cope with aggressive media. It can even be supplied in titanium to order!
The AVTA valve has seen a lot of changes – it’s evolved to suit customer requirements and today is used in numerous hi-tech applications. This very special product is still in its prime, and is likely to remain a customer favourite in the future.



By Karsten Holtebo, Application Manager, Marine

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