Manual

X – Isolation Cocks ○
FC – Flo-Clean Strainer ○
Y – Y-Strainer (Replaces Flo-Clean) ○
ACS – Adjustable Closing Speed ○
(Replaces Fixed Orice)
AOS – Adjustable Opening Speed ○
P – Position Indicator ○
L – Limit Switch ○
8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com
06/08
Cl a s s i C se r i e s
Standard Components
Options & Accessories
(3)
(3)
(3)
(2)
(2)
(1)
(1)
Standard 3” & Smaller
Standard 4” & Larger
Optional All Sizes
(3)
(2)
(1)
Schematics
Throttles to reduce high upstream pressure to •
constant lower downstream pressure
P/L
3
2
CLOSES VALVE
OPENS VALVE
FLOW
(AOS)
X
X X
1
Y/FC
(AOS)
F115 (Globe)
F1115 (Angle)
PRESSURE REDUCING
CONTROL VALVE
1 – Main Valve (Single Chamber)
2 – Pressure Reducing Control
3 – Fixed Orice
Reducing setpoint is adjustable•
Operations
The Watts ACV Pressure Reducing Control Valve is designed to automatically reduce a uctuating higher
upstream pressure to a constant lower downstream pressure regardless of varying ow rates. It is con-
trolled by a normally open, pressure reducing pilot designed to: 1) Open (allowing uid out of the main valve
cover chamber) when downstream pressure is below the adjustable setpoint, and 2) Close (allowing uid to
ll the main valve cover chamber) when downstream pressure is above the adjustable setpoint. A decrease
in downstream pressure causes the valve to modulate toward an open position, raising downstream pres-
sure. An increase in downstream pressure causes the valve to modulate toward a closed position, lowering
downstream pressure.
Installation Guidelines