Flexible air buffers (‘lungs’)
Pressure fluctuations in your cool cell as a result of cooling or weather conditions can cause leaks and lead to the addition of O2. A flexible air buffer is therefore vital. Pressure changes as a result of refrigeration or weather conditions, for example, are balanced out by using a flexible air buffer (‘lung’). The buffer is made of a durable, flexible and multi-layer PU film. Each storage area is fitted with its own buffer. Air buffers are sized on the basis of the volume of a storage cell and are available in volumes of 2 - 12 m3.
Over and under pressure valves
In extreme circumstances, an air buffer is insufficient for smoothing out pressure differences. In this case, an over/under pressure valve will take up the pressure difference in your storage area in order to prevent damage from occurring. This safeguard is triggered if there is over/under pressure of circa ± 10 mm Wk. Every cool cell used for CA/ULO storage needs at least one under and one over pressure valve. Numerous valves will be used for larger cells.
Cell valves
Scrubbers are connected to the cool cells via PVC pipes. Pipes with a diameter ranging from 50 to 160 mm and corresponding cell valves are used, depending on the type of machine. Our cell valves are pneumatic and are, therefore, very reliable and durable. 
