Two-wire I/P converter with energy storage

Details Two-wire I/P converter with energy storage Two-wire I/P converter with energy storage

1989-05-08

1990-08-28

Chambers, A. Michael

Fluid handling

Line condition change responsive valves

Pilot or servo controlled

1371165, 251 3001, F16K 31126

Patent

active

049517058

ABSTRACT:
A pneumatic regulator in the form of an electro-pneumatic device (an I/P regulaor) in which the pressure of pneuamtic medium is controlled in response to an electrical signal in which the pneumatic pressure regulator incorporates a control volume whose pressure is used to regulate the main pneumatic pressure and the pressure in the control volume being under the control of pneumatic valves, the valves being opened and closed by electrical signals provided by an electrical circuit, which circuit incorporates electrical storage so as to permit the electrical circuitry to operate the valve on currents in the range 4-20 mA so that the electro-pneumatic regulator can be operated directly by electronic control systems without the need of supplementary electrical feeds.

REFERENCES:
patent: 2806481 (1957-09-01), Faust
patent: 2994334 (1961-08-01), Loveless
patent: 3240223 (1966-03-01), Vander Horst
patent: 3369561 (1968-02-01), Zimmerman et al.
patent: 4722360 (1988-02-01), Odajima et al.

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