Emerson Digital Controller Valves 788 DVC Instrukcja Obsługi Pobierz pdf (Strona 14)

DEC 2012 DANIEL MODEL 788DVC DIGITAL CONTROL VALVES

THEORY OF OPERATION2-2

CLOSED POSITION -

The normally closed solenoid is closed. The normally open solenoid is open. Y-port (P3) to Z-port

(P2) is closed. X-port (P1) and Y-port (P3) pressures are balanced. The main valve spring being the

differential force, closes the piston and keeps it seated.

Figure 2-1. Closed Position

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Emerson Digital Controller Valves 788 DVC Instrukcja Obsługi Strona 14