21 JANUARY 2003
Figure 5.2. Nonsurge/Check Valve (81AF-8).
5.4. F/S. Chapter 3 gives a description of typical F/Ss and Chapter 10 outlines the maintenance
5.5. F/S Control Valve (FSCV) (40AF-2C).
5.5.1. General. The 40AF-2A FSCV has been modified at most bases and the new valve is known as
the 40AF-2C (Figure 5.3). The 40AF-2C valve still performs the same functions as the 40AF-2A
(controls the rate of flow through the separator, prevents reverse flow, prevents water discharge when
the flange float control reaches the high position), but now the powertrol, hytrol, and ejector (see
Figure 4.3) were replaced with a 102B-1, three-way hytrol with a 3.1-millimeter (0.125-inch) orifice.
5.5.2. Valve Settings. Set the rate-of-flow control to discharge 2271 liters per minute (600 gallons
per minute) using the CDHS-2B. Turn the adjusting stem clockwise to increase the flow rate and
counterclockwise to decrease.