| English term or phrase: tilt axis | For moving the shutter 10 from the closed position of FIGS.1 -3 into an open position remote from the valve seat 12 and vice-versa, the arrangement comprises dual-motion shutter-actuating device 20. The shutter-actuating device 20 comprises a fork-shaped primary tilting arm 22 that is fixed to a first tilting shaft 24. The first tilting shaft 24 is rotatably supported, by means of a pair of external axially spaced roller bearings 26, inside a hollow cylindrical support 28 that is attached to the housing 14. Accordingly, the first tilting shaft 24 defines a first tilt axis 29 and rotatably supports the primary tilting arm 24 on a stationary structure, which in case of FIGS.1-3 is the lower sealing valve housing 14.
Ось поворота или лучше просто ось??
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