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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