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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||251/305 ; 251/306|
|발명자 / 주소||
|출원인 / 주소||
|인용정보||피인용 횟수 : 13 인용 특허 : 0|
A butterfly valve with a seal face (4)having two opposite, essentially spherical sections (h, i) intersected by a symmetry plane (k) through the throttle which coincides with an axis through a point (n) parallel with the torsional axis (j) of the throttle and two opposite, essentially conical sections (f, g) on both sides of the symmetry plane. The spherical and the conical sections successively merge into each other. When the throttle is revolved to shutting position, the sealing line (a) which has circular shape is pressed against a valve seat (18) sha...
Butterfly valve comprising a valve housing including a valve seat and a throttle arranged to be turned around a stem going through the valve housing between an open position and a shut-off position in which a seal face on the throttle is pressed against the seat in the valve housing, the seal face having two opposite, essentially spherical shaped sections intersected by a symmetry plane through the throttle coinciding with the torsional axis of the throttle, and two essentially conically shaped sections on each side of said symmetry plane between the two...