New DS Triple Pulsation Damper

The improved version of the Aseptic Damper utilizing the diaphragm principle is based on a deep understanding of the physical conditions around a homogenizer and, not the least, a desire to make the aseptic system more robust.


Damper Function

In this paper, the most frequently used homogenizer type with 3 pistons delivering 12000 liters per hour has been used as a reference in the below detailed discussion:

The peak delivery from a 12000 liter per hour homogenizer as the piston delivery is at its highest is almost 14000 liters per hour and the lowest is approx. 8,300 liters per hour.

With 3 pistons, this takes place 3 times per revolution and as the RPM is 165, it happens 495 times per minute and at a frequency per second: 8.25 Hz.

Each dip happens over approximately 100 angular degrees of a revolution, so that the accumulated volume must be absorbed over the first 50 degrees and returned to the flow in the next 50 degrees. This gives a time frame of only 0.1 second and It is noteworthy that the overlap is a sudden change requiring the lowest inertia possible for an optimal result.

Based on the diaphragm principle (made from solid foodgrade silicone) the large membrane is divided into smaller sections. As a result, when the pressure drops and feed-compensation to the homogenizer is required, the membrane allows for a shallow depression of sections of the membrane ensuring a fast absorption of pressure and volume and equally fast response.

As the function is depending on the stretching of the material, it means that higher working pressures (max. 35 bar) makes the damper even more efficient.

An even faster response can be achieved at low-pressure ranges by pre-stressing the damper with steam or condensate.


When comparing this damper to other dampers, it has the following advantages:

  • The large surface allows a high absorption capacity.
  • The reaction time is fast and it does not change during runtime.
  • It does not fill up, which hinders the functionality.
  • Runtime is not restricted due to a gradual fill up of the damper.
  • There is no mass inertia as it works directly off the membrane.
  • A positive displacement (a dead end is considered a major risk).
  • Any leaks are detectable.
  • The pressure from leakages are contained.
  • No risk to personnel in case of leak.
  • No manual cleaning is required.
  • The basic principle is tested and proven for many years.
  • A preferred design by Nestle


Aseptic Performance

The performance of the solution has been tested for many years and runtimes between sterilizations are proven for days on a regular basis.

DS Triple has further improved the design by ensuring a positive displacement of the chamber steam flushing. Uniquely, it is no hindrance to long runs as all areas are constantly wetted which avoids dry deposits in the damper. The damper significantly aids to improve the OEE of a plant without any risk arising from dampers.


Key features, that improves the aseptic performance:

  • The large surface allows a high absorption capacity.
  • Leak detection with positive displacement in the flush chamber throughout the length of the diaphragm.
  • In-line effective CIP and SIP.
  • The absence of an inaccessible void.
  • An optional fully steam sterilized inner as a built-in option.
  • No dead-ends and an ensured displacement of the product content removes any risks of built-up of growth, both upstream and downstream.
2017-10-11T14:01:41+00:00 Sep, 2017|

DS Triple A/S
F. L. Smidths Vej 9
8600 Silkeborg

Tel: +45 87 22 11 11