Single seat self-acting pressure reducers for steam, water, air and other types of non-hazardous fluids (Group 2 Directive 2014/68/EU. Equipped with balancing bellows and a large section driven plug, they allow an accurate regulation in any process condition. Adjustment of the calibration range is extremely simple as it can be carried out with a common spanner wrench without the aid of special tools. The "Quick-change" actuator makes the reducer setting range extremely fast even if already mounted on the plant. From 1" to 4" - ANSI 150/300