Actuating drive for a control valve

Details Actuating drive for a control valve Actuating drive for a control valve

1994-06-02

1995-11-21

Lopez, F. Daniel

Motors: expansible chamber type

With motive fluid valve

Self-opening exhaust valve held closed by inlet pressure

91447, 91DIG3, 60406, F15B 1304

Patent

active

054676835

ABSTRACT:
This actuating drive (1) for a control valve (2) has a control circuit which sets the actuating drive (1) to correspond with a specified required value from an overriding installation control system. It has, in addition, a main piston (6) sliding in a main cylinder (5) with a drive volume (7), on one side of the main piston (6), which can be acted on in a controlled manner by oil under pressure and has a plate valve (17) fitted upstream of the drive volume (7).
The intention is to create an actuating drive, for a control valve, whose dynamic behavior can be improved by relatively simple means. This is achieved by the plate valve (17) being provided with a separate reservoir volume, connected to a drain appliance, for the oil emerging from the plate valve (17).

REFERENCES:
patent: 2204270 (1940-06-01), Dinzl
patent: 4589444 (1986-05-01), Masek

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