Catalog - Tri-State Technical Sales Corp.
Catalog - Tri-State Technical Sales Corp.
Catalog - Tri-State Technical Sales Corp.
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ACCESSORIES AND OPTIONS<br />
Backflow Preventer (Standard Feature)<br />
If outlet pressure exceeds the inlet pressure, the main valve can<br />
open and backfow may occur. To prevent backflow, a standard<br />
backflow preventer is incorporated in the F200, F300, and<br />
F500 pilots. An increase in the outlet pressure above the inlet is<br />
transmitted to the top of the main valve piston, thus keeping<br />
the main valve closed and protecting the vessel from exposure<br />
to backpressure and backflow contamination.<br />
DOME<br />
COMMUNICATION<br />
PORT<br />
INLET FEED<br />
EXHAUST<br />
BACKPRESSURE<br />
INLET<br />
14<br />
CLOSED WITH BACKPRESSURE<br />
GREATER THAN INLET PRESSURE<br />
INLET<br />
CLOSED WITH INLET PRESSURE APPLIED<br />
Manual/Remote Blowdown<br />
This allows the main valve to lift without opening the pilot valve,<br />
by discharging the piston dome pressure directly to the<br />
atmosphere. This is accomplished by use of a manual or<br />
automatic blowdown valve, e.g. hand valve or solenoid valve.<br />
MANUAL<br />
VALVE<br />
F7000/8000 SERIES
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