Victor Technologies 0781-9405 G250-15-510 Medium Duty Single Stage Acetylene Regulator, 15 psig Delivery Range, CGA 510 Inlet Connection Review Mutantra June 15, 2019 June 15, 2019 No Comments on Victor Technologies 0781-9405 G250-15-510 Medium Duty Single Stage Acetylene Regulator, 15 psig Delivery Range, CGA 510 Inlet Connection Review G250 Series, single stage, medium duty Regulator. Recommended for applications where slight delivery pressure increases (due to decreasing cylinder pressures) would not affect the performance characteristics of the work or test results.