PRECISION PETROLEUM TESTING INSTRUMENTS
Although the method allows both a circular, Norton ceramic (stone) diffuser and a Mott cylindrical metal diffuser, there are advantages and disadvantages to each. The stone diffuser was used for many years before the introduction of the metal diffuser. Both need to meet certification requirements but the metal diffuser is much more uniform, easier to […]
The diffusers used in foam testing must meet a certain permeability and pore diameter. The diffusers, especially the ceramic stones, change over time and fall out of specification, sometimes very quickly. They should be verified at least every week or every ten tests. The frequency necessary can only be determined by individual laboratory based on […]
The physical orientation of the diffuser will affect bubble size and therefore the results of the test. Thus, it is very important to be sure that the air-inlet tube is in the center of the cylinder and perfectly straight all the way down to the bottom. This is not an easy task. The Appendix of […]