Witt-Gasetechnik offers Oxygen Pressure Regulator, 737LE-ND. It is an industrial quality, maintenance-free oxygen regulators with constant flow in the low-pressure part of the range. It is a high quality dome pressure regulator.
Until now, finding a reliable low-pressure safety valve (mbar) has been a problem for operators of gas systems. Prior to this product launch safety valves available in the marketplace for this purpose either failed to offer the necessary sensitivity, or were not capable of upholding the opening pressure.