Control valve trim

Details Control valve trim Control valve trim

1991-11-22

1993-02-16

Rosenthal, Arnold

Fluid handling

With cleaner, lubrication added to fluid or liquid sealing...

Cleaning or steam sterilizing

251122, F16K 138

Patent

active

051862069

ABSTRACT:
An improved control valve assembly that resists plugging by fluids contaminated with sticky solids, e.g. sludge or particulates, comprising a valve containing a modified valve trim having a stepped cross-section rather than a continuous taper created by reducing the diameter of the valve stem at a point on the stem corresponding to a position of 90 percent open, so that the modification causes the flow area to suddenly increase drastically when the valve opens to 90 percent open in response to flow falling below a predetermined setpoint.

REFERENCES:
patent: 1729802 (1929-10-01), Smith
patent: 1911905 (1933-05-01), Knowlton et al.
patent: 2881783 (1959-04-01), Andrews
patent: 4688755 (1987-08-01), Pluviose

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