Dual adjustment valve (DR valve)

The ERFI automatic control valves allow you to adjust the flow factor with an complementary adjustement dissociated from the regulating control . It is possible to vary this adjustment according to the process without modifying the opening stroke of the valve .

The valves can be equipped with an electric or pneumatic servo-motor with an option of manual breakdown service. 

These valves allow you to regulate air flows or to control air/gas mixture .