The RB 4600 regulator is designed for use in city gate or district stations where overpressure protection is provided by a combination of an active regulator and a monitor regulator with an upstream slam-shut valve.

The RB 4600 is a pilot-operated regulator with a monitor regulator and a safety shut-off device built into a single compact unit. Its pilot system provides a fast and accurate response to flow rate variation. The monitor pilot system is especially fast to react and to take over in case the active regulator fails to control the outlet pressure.

The optional built-in shut-off valve offers protection for overpressure or over-and under-pressure. Its bypass system  eases the shut-off valve relatching.