Three-station machine for pressure regulators tests. Leakage test check on three ways at a maximum of 10 bar, regulator pressure curve test. Manual loading of the regulators and cycle start from the operator; automatic air inlet and pressure test (10 bar pressure), automatic regulator curve test following the pressure test. Scrap pieces are segregate and accessible only to authorized personnel. Manual unload of the OK piece after the test result. Percussion marking to discriminate the piece.