In case of surface filters this can be given together with pores dimension. In case of paper filters and of filters of glass fiber these dates refer to the used liquid and it represents the dimension of those particles that in conditions of controlled filtering and on the basis of practical experiments remain in proportion of 98% on the filter. Because in case of filters of depth these values are not easy to be defined, in most cases there are given domains and examples of using.Demand offer

The speed of filtration. In practice the speed of filtration depends of more parameters, as for example loading of filter. So for filters comparison it is determined the initial value of filtration in standard conditions with measurement instrument of the flow Herzberg. The flow can be also measured with the method ASTM modifiedDemand offer

It refers at that loading at which there can be obtained a filtration acceptable speed.. If we make a comparison between a filter with glass fiber and one of cellulose so in general the first has a bigger capacity of loadingDemand offer