Diagram 7.2.4.2
The efficiency quotient of the orifice is less than 1 and not taken into account by the diagram. This causes the quantity of air flowing out of the orifice to be smaller than the amount obtained on the basis of theory. In practice, a factor derived from the proportion between loading time and pressure build-up time is taken into account when designing the orifice.
Diagram 7.2.4.3
The efficiency quotient of the orifice is less than 1 and not taken into account by the diagram. This causes the quantity of air flowing out of the orifice to be smaller than the amount obtained on the basis of theory. In practice, a factor derived from the proportion between loading time and pressure build-up time is taken into account when designing the orifice.
