Description: mean flow velocity through the valve opening area; Name: valve opening speed
Description: mean velocity of the flow through the valve spill area; Name: valve spill velocity
Description: PN (nominal pressure) is an alphanumeric variable for reference purposes, relating to a combination of mechanical and measurement properties of a pipe component. It comprises the letters PN followed by a dimensionless number (according to EN 1333/96.08); Name: Nominal pressure of the muffs, A2