For checking two safety valves before and/or after burner run, with adjustable measurement time (5-30 s) for adjustment to different test volumes, leakage rates and inlet pressures, EU certified For quick or slow opening individual valves Rp internal thread pu max. 500 mbar Mains voltage: 230 V AC, 50/60 Hz Control voltage: 230 V AC, 50/60 Hz