The Berluto DRV 402-6 and DRV 403-6 are direct-acting pressure reducers featuring diaphragm, spring, and inlet pressure compensation. Adjustment is achieved through the balance of downstream pressure and spring preload, without auxiliary energy or impulse line. Designed for potable water, materials comply with European drinking water legislation.
The DRV 403-6 covers DN15–DN32 and is available as DRV 403-6 H with installation lengths adapted to common replacement dimensions. The DRV 402-6 covers DN40–DN65. Both versions have p1 up to 16 bar and p2 1.5–6 bar.
The body is made of red bronze CC499K. The spring cap is PA6 up to DN32 and cast iron from DN40. Wetted parts are Hostaform C and brass up to DN32, and brass from DN40. Diaphragms and seals are EPDM with ELL and W270 approvals. Metallic materials are listed in the German Federal Environment Agency's positive list.
Suitable for building and industrial potable water networks, distribution zones, equipment supply lines, thermal subsystems, and points requiring downstream pressure limitation before consumption.
The valve features an integrated filter and replaceable cartridge-type internal parts. Installation can be in any position, preferably vertical. Selection requires p1, desired p2, peak flow, DN, Kvs, temperature, and DVGW certification requirement, where applicable.
DRV 402-6 / 403-6
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 up to DN 65
Inlet pressure up to 16 bar
Outlet pressure from 1.5 up to 6 bar
Temperature range -15°C to 75°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.
