Actuator

Details Actuator Actuator

1990-11-08

1992-08-11

Walton, George L.

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

91361, 91459, 251 3002, F16K 31124, F16K 3142, F15B 1316

Patent

active

051372533

ABSTRACT:
An actuator for a control valve with a control circuit has a main piston which slides in a main cylinder. On one side of the main piston, there is arranged a drive volume, which can be pressurized with oil in a controlled manner, on the other side of which there is arranged an oil-filled buffer volume. The actuator despite having a greater capacity, has a comparatively high dynamic performance which has positive effects particularly when closing the control valve. This is achieved in that the drive volume and the buffer volume can be connected through a connecting line which can be sealed off by a valve. This valve is activated directly hydraulically via a second valve.

REFERENCES:
patent: 3495501 (1970-02-01), Kure-Jensen
patent: 3948478 (1976-04-01), Vind
patent: 4043533 (1977-08-01), Cowley
patent: 4149565 (1979-04-01), Jennings et al.
patent: 4215844 (1980-08-01), Bowen
patent: 4311296 (1982-01-01), Scheffel
patent: 4335867 (1982-06-01), Bihlmaier
patent: 4589444 (1986-05-01), Masek et al.
patent: 4637587 (1987-01-01), Kuhnlein

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