Watts S1115-11 User Manual download pdf

8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.wattsacv.com

01/05

Stainless Series

S115-11 or S6115-11 (Globe)

S1115-11 or S61115-11 (Angle)

Operation

The Watts ACV Combination Pressure Reducing and Sustaining Control Valve with Hydraulic Check Feature

is designed to automatically reduce a ﬂuctuating higher upstream pressure to a constant lower downstream

pressure regardless of varying ﬂow rates, and will throttle to sustain a minimum upstream pressure. It

is controlled by a normally open, pressure reducing pilot designed to: 1) Open (allowing ﬂuid out of the

main valve cover chamber) when downstream pressure is below the adjustable setpoint, and 2) Close

(allowing ﬂuid to ﬁll 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 pressure. An increase in downstream pressure causes the valve to modulate toward a closed

position, lowering downstream pressure.

The normally closed sustaining pilot remains open when upstream pressure is above the adjustable setpoint,

and modulates toward a closed position if upstream pressure falls below the setpoint. As the sustaining pilot

closes, ﬂuid is directed into the main valve cover chamber, allowing the valve to modulate toward a closed

position, raising upstream pressure. Normal pressure reducing operation resumes when upstream pressure

is above the sustaining pilot setpoint, and downstream pressure is below the reducing pilot setpoint.

If downstream pressure becomes greater than upstream pressure, downstream pressure is admitted to

the main valve cover chamber, closing the valve and preventing reversal of ﬂow. Normal backpressure or

sustaining operation resumes when upstream pressure exceeds downstream pressure.

PRESSURE REDUCING AND

SUSTAINING VALVE with

HYDRAULIC CHECK FEATURE

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8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.wattsacv.com01/05RStainless SeriesS115-11 or S61

Page 2

8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.wattsacv.com01/05RStainless SeriesS115-11 or S61

Watts S1115-11 User Manual