After all preparations for flow capacity tests have been made, the valve in the air-supply line is to be opened slowly and the pressure to the valve under test is to be increased to the appropriate flow rating pressure.
Kui kõik ettevalmistused vooluhulga katseks on tehtud, tuleb õhu etteande toru ventiil aeglaselt avada ning katsetatavale klapile avalduvat rõhku suurendada sobiva vooluhulga kindlaksmääramise rõhuni.