Purge Flowmeter

One variety of variable-area flowmeters is the purge flowmeter (see Figure 7.6.11). The features and characteristics of these instruments are summarized next.

FIG. 7.6.10 The segmental wedge flowmeter designed for clean fluid service.
FIG. 7.6.11 A purge flow regulator consisting of a glass tube rotameter, an inlet needle valve, and a differential pressure regulator. (Reprinted, with permission, from Krone America Inc.)

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