Multistep trim design

Details Multistep trim design Multistep trim design

1990-09-04

1992-05-19

Rosenthal, Arnold

Fluid handling

Systems

Multi-way valve unit

13762533, 29890122, 251127, F16K 4704

Patent

active

051139081

ABSTRACT:
A trim design (40) comprises a housing (42) having a generally cylindrical passage (44) passing therethrough. Disposed between an inlet (50) and an outlet (48) is a stepped plug (52) having an axial length. Telescopically receiving the stepped plug (52) is a stepped first cage (56). A second cage (82) having apertures (84) therethrough is positioned between the outlet (48) and the first cage (56). The first cage (56) has axial channels (80) for the passage of fluid through the trim design (40). As the plug (52) is moved from a closed position to an opened position, fluid enters a tortuous path formed by the stepped plug (52), the first cage (56) and the axial channels (80) to produce a desired flow capacity change. Flow path decreases in tortuosity with increasing plug travel thereby increasing the flow capacity.

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