The Berluto DRV 302 / 303 / 308 series are diaphragm-operated pressure reducers with a regulating spring and inlet pressure compensation. Suitable for water and neutral, non-sticky liquids, they can also be used with air or neutral gases when higher flow rates are required. For potable or seawater, consider the DRV-6 or DRV-SW series.
DRV 302 covers DN15–DN50, with p1 up to 40 bar for DN15–DN32 and up to 25 bar for DN40–DN50. DRV 303 covers DN15–DN32, with p1 up to 16 bar and a plastic cap, thus limiting temperature to 75°C. DRV 308 is used when an outlet adjustment up to 10 bar is required.
The body is made of red bronze CC499K. Wetted parts are Hostaform C/POM and brass up to DN32, and brass from DN40. Seals are available in NBR, EPDM, or FKM. The HT version, available for DRV 302/308, uses FKM and metallic internal parts for temperatures up to 190°C, but is not intended for steam.
The valve features an integrated filter, replaceable cartridge-type internal parts, and dual manometer connection G 1/4” for outlet pressure. Installation can be in any position, with a preference for vertical. Selection requires p1, p2, flow rate, DN, medium, temperature, Kvs, and sealing material.
DRV 302 / 303 / 308
Pressure reducing valves of the series are diaphragm-controlled, spring-loaded pressure reducing valves and have inlet pressure compensation. The cartridge design allows easy replacement of the internal parts.
Nominal size DN 15 to DN 50
Inlet pressure up to 40 bar
Outlet pressure from 1.5 up to 10 bar
Temperature range -30 °C to 190 °C
Technical data
CE-certification according to the European Pressure Equipment Directive is mandatory for numerous products and delivery areas. Other certificates, however, are certificates of individual quality, such as DVGW and DIN EN ISO 9001, which stands for the internal quality management system with its extensive functional and performance checks. The particularly strict regulations of the national rules and regulations guarantee the highest possible safety - especially when it comes to the reliability in your plant.
