초록 ▼

The invention relates to an arrangement in regulating valves for steam, gases or liquids and includes a cage (2) fixedly disposed in a valve housing (1), there being a movable valve body in the cage, the body (3) being positionally settable in the fixed cage (2) via a spindle (4) such as to be seali

The invention relates to an arrangement in regulating valves for steam, gases or liquids and includes a cage (2) fixedly disposed in a valve housing (1), there being a movable valve body in the cage, the body (3) being positionally settable in the fixed cage (2) via a spindle (4) such as to be sealingly engageable via a sealing surface (5) formed on it against a seating (6) formed in the valve housing (1), the body (3) during its movement to its upper, i.e. fully open, position successively uncovering orifices (9) in the fixed cage (2) for achieving a gradual increase in through-flow area in the valve. The body (3) has a short skirt (10) coacting with seating (6) and provided with a plurality of orifices or grooves (11) which are successively uncovered at the beginning of the valve opening phase, as the body (3) moves away from its sealing engagement against the seating (6), or successively closed off during the valve closing phase as the body moves towards sealing engagement against the seating (6) such as to serve as an extra throttling locating for small opening increments for achieving great regulation accuracy even with small flows.

대표청구항 ▼

[ We claim:] [1.] Arrangement in regulating valves for steam, gases or liquids, the arrangement comprising:a valve housing;a cage fixedly disposed in the valve housing, the cage having sidewalls with a length and orifices for fluid flow through the cage formed along the length of the sidewalls;a sea

[ We claim:] [1.] Arrangement in regulating valves for steam, gases or liquids, the arrangement comprising:a valve housing;a cage fixedly disposed in the valve housing, the cage having sidewalls with a length and orifices for fluid flow through the cage formed along the length of the sidewalls;a seating disposed within the valve housing;a valve body movably disposed within the cage so as to selectively and successively block fluid flow through the orifices in the sidewall of the cage as the valve body moves between an open position in which none of the orifices in the sidewall are blocked, and a closed position in which all of the orifices in the sidewall are blocked and the valve body seats against the seating;a spindle cooperating with the valve body to position the valve body within the cage; andan annular skirt extending from the valve body and coacting with the seating, the skirt having a length and a plurality of orifices extending through the skirt and spaced along the length of the skirt for independent fluid flow therethrough, the plurality of orifices through the skirt being blocked by the seating in the closed position, the orifices through the skirt being arranged along the length of the skirt so as to be successively unblocked at the beginning of a valve opening phase, as the valve body moves away from the closed position toward the open position, so as to serve as an extra throttling location for small opening increments of the valve body.