Current to pressure converter apparatus

Fluid handling – Pressure modulating relays or followers – With counter-balancing pressure feedback to the modulating...

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1374875, G05D 1600

Patent

active

043253997

ABSTRACT:
The present invention relates to a current controlled pressure regulating apparatus for operating pneumatically operated elements such as valves in process control systems and the like. The apparatus is designed to provide for direct mechanical control of the pressure regulating apparatus in response to changes in current flow in a two wire current controller.

REFERENCES:
patent: 2456669 (1969-07-01), Lloyd
patent: 2505981 (1950-05-01), McLeod
patent: 2842147 (1958-07-01), Markson
patent: 2917064 (1959-12-01), Hunter
patent: 2993497 (1961-07-01), Coles
patent: 3113582 (1963-12-01), Hudson
patent: 3625246 (1971-12-01), Reaves

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