Electropneumatic converter with solenoid valve control.

摘要

An electropneumatic converter controlled by solenoid valves (1,4), in which said solenoid valves (1,4) are connected respectively to the feed pressure (3) and to atmosphere (5), each via a pressure regulator (22,27) controlled by a differential pressure measurement device (23,28) connected across the relative solenoid valve (1,4), so as to maintain a constant pressure difference across said solenoid valves (1,4); preferred embodiments are also described.