Fluid handling – Line condition change responsive valves – Pilot or servo controlled
Patent
1994-06-15
1996-12-24
Lee, Kevin
Fluid handling
Line condition change responsive valves
Pilot or servo controlled
137 85, 1371165, 251 29, G05D 1620
Patent
active
055865755
ABSTRACT:
An electropneumatic converter controlled by solenoid valves, in which the solenoid valves are connected respectively to the feed pressure and to atmosphere, each via a pressure regulator controlled by a differential pressure measurement device connected across a respective solenoid valve, so as to maintain a constant pressure difference across the solenoid valves.
REFERENCES:
patent: 3452775 (1969-07-01), Alberani
patent: 4898200 (1990-02-01), Odajima et al.
patent: 5310111 (1994-05-01), Linck
patent: 5370152 (1994-12-01), Carey et al.
Bergamini Giorgio
Mininni Venanzio
Lee Kevin
Nuovopignone - Industrie Meccaniche e Fonderia S.p.A.
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