Electropneumatic servo valve for controlling a volume current an

Details Electropneumatic servo valve for controlling a volume current an Electropneumatic servo valve for controlling a volume current an

1983-05-02

1985-06-25

Favors, Edward G.

Fluid handling

Systems

Multi-way valve unit

13762565, F15B 13043

Patent

active

045248044

ABSTRACT:
Electropneumatic servo valve for controlling a volume current or a pressure, respectively.
The subject matter of the invention relates to a two-stage, electropneumatic servo valve for controlling a volume current. The servo valve (1, 2) consists of an electromechanically controllable preliminary control stage (1), by means of which electric control signals are converted into pneumatic control pressure in a control air space (29) between the preliminary control stage (1) and a valve main stage (2) with a nozzle impact plate system (22, 9). The variably controllable control air pressure in the control air space (29) serves as actuating force for positioning a control piston (54) in the valve main stage (2), on the basis of which a proportional volume current can be adjusted at an operating output (A).
The electropneumatic servo valve (1, 2) serves to convert electric control signals of low power for controlling a relatively large volume current for the operation of pneumatic drives.

REFERENCES:
patent: 4196751 (1980-04-01), Fischer et al.
patent: 4378031 (1983-03-01), Nicholson et al.

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