Control apparatus

Details Control apparatus Control apparatus

1998-06-03

2000-04-18

Chambers, A. Michael

Fluid handling

With indicator, register, recorder, alarm or inspection means

Plural

137554, 137557, 2513353, 73 40, 374 4, F16K 4900

Patent

active

060502967

ABSTRACT:
The invention relates to a control apparatus, comprising an actuating drive and an actuator connected therewith, whereby the actuator comprises at least one valve face and a throttle element that works herewith. The throttle element can be moved relative to the valve face by means of an actuating spindle connected with the actuating drive for the execution of a rotational and/or piston motion. The actuating spindle is sealed against the valve interior chamber at a first sealing location. A second sealing location likewise seals the actuating spindle, and, between the two sealing locations. There is a test chamber that is accessible via at least one control terminal, to which chamber a pressure sensor is connected. The pressure sensor is connected with an evaluation unit for monitoring the operation of the control apparatus. The signal output of the pressure sensor can be compared, in the evaluation unit, with a response threshold dependent on at least one temperature signal, for the outputting of an error status message to an error status output of the evaluation unit.

REFERENCES:
patent: 3938544 (1976-02-01), Bernaerts
patent: 4901751 (1990-02-01), Story et al.
patent: 4972867 (1990-11-01), Ruesch
patent: 5203370 (1993-04-01), Block et al.
patent: 5287881 (1994-02-01), Szatmary
patent: 5345812 (1994-09-01), Haboian
patent: 5586576 (1996-12-01), Franke et al.

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