Watts M61115-3 User Manual
Mu s t a n g se r i e s
1
X X
XX
Y/FC
P/L
2
CLOSES VALVE
OPENS VALVE
FLOW
3
4
3
(AOS)
Schematic
PRESSURE REDUCING VALVE
w i t h HYDRAULIC CHECK FEATURE
06/08
M6115-3 (Globe)
M61115-3 (Angle)
Throttles to reduce high upstream pressure to •
constant lower downstream pressure
Hydraulic Check Feature prevents ow reversal•
Reducing set-point is adjustable•
Standard Components
1 – Main Valve (Single Chamber)
2 – Pressure Reducing Control
3 – Check Valve
4 – Fixed Orice
Options & Accessories
X – Isolation Cocks ○
FC – Flo-Clean Strainer ○
Y – Y-Strainer (Replaces Flo-Clean) ○
ACS – Adjustable Closing Speed ○
(Replaces Fixed Orice)
AOS – Adjustable Opening Speed ○
P – Position Indicator ○
L – Limit Switch ○
(2)
(1)
(3)
(3)
(1)
Standard 3” & Smaller
(2)
Standard 4” & Larger
(3)
Optional All Sizes
(2)
(3)
(1)
Operations
The Watts ACV Combination Pressure Reducing and Check Valve is designed to automatically reduce a
uctuating higher upstream pressure to a constant lower downstream pressure, and close drip-tight when
downstream pressure becomes greater than upstream pressure.
It is controlled 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 pressure. An increase in downstream pressure causes the valve to modulate toward a closed
position, lowering downstream pressure.
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 ow. Normal pressure reducing
operation resumes when upstream pressure exceeds downstream pressure.
8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com
Mu s t a n g se r i e s
I
H
C
H
F G
D
E
A
B
H
M6115-3 (Globe)
M61115-3 (Angle)
Materials
Body & Cover: Ductile Iron ASTM A536
Coating: NSF Listed Fusion Bonded
Epoxy Lined and Coated
Trim: 316 Stainless Steel
Elastomers: Buna-N (standard)
EPDM
Viton
Stem, Nut & Stainless Steel
Spring:
Operating Pressure
Threaded = 400 psi
150 Flanged = 250 psi
300 Flanged = 400 psi
Operating Tempera-
Operating Temperature
ture
Buna-N: 160°F Maximum
EPDM: 300°F Maximum
Viton: 250°F Maximum
Globe
Pilot System
Reducing Control
30-300 psi (Standard)
0-30 psi (Optional)
Angle
Tubing & Fittings
Copper / Brass (Standard)
Stainless Steel (Optional)
Dimensions
A B C D E F G H I
VALVE
SIZE
3 10-1/4 11 7 - - - - 3/8 1/2 21
4 13-7/8 14-1/2 8-5/8 6-15/16 7-1/4 5-1/2 5-13/16 1/2 1/2 39
6 17-3/4 18-5/8 11-5/8 8-7/8 9-3/8 6-3/4 7-1/4 3/4 3/4 89
8 21-3/8 22-3/8 15 10-11/16 11-3/16 7-1/4 7-3/4 3/4 3/4 150
10 26 27-3/8 17-7/8 - - - - 1 1 283
GLOBE
150#
GLOBE
300#
COVER TO
CENTER
ANGLE
150#
ANGLE
300#
ANGLE
150#
ANGLE
300#
PORT
SIZE
PORT
SIZE
SHIPPING
WEIGHTS*
For larger sizes consult factory
Valve Cover Chamber Capacity
Valve Size (in) 3 4 6 8 10
.oz. 4 10 22 70
U.S. Gal
- - - -
-
1-1/4
Valve Travel
Valve Size (in) 3 4 6 8 10
(in) 1/2 3/4 1 1-1/2 2
8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com
CAVITATION ZONE
INLET PRESSURE - PSI
OUTLET PRESSURE - PSI
300
280
260
240
220
200
180
160
140
120
100
80
60
40
20
0 10 20 40 50 60 70 80 90
130 14012011 0100
30
CAVITATION CHART
M6115-3 (Globe)
Mu s t a n g se r i e s
Sizing
Size (in) 3 4 6 8 10
Maximum Continuous (GPM) 260 580 1025 2300 4100
Minimum Continuous (GPM) 1 30 50 115 200
Maximum continuous ow based on velocity of 20 ft. per second.
Minimum continuous ow based on velocity of 1 ft. per second.
NOTE: The above chart is a suggested guide. Inlet pressure, outlet pressure, minumum, normal and maximum ow rates should
be considered for specic valve sizing. Contact Watts ACV for details.
Cavitation Chart
After selecting the valve size, locate inlet and outlet pressures on this chart. If the intersection point falls
in the shaded area, cavitation can occur. Operation of valves continually in the cavitation zone should be
avoided. Consult Watts ACV for alternatives.
M61115-3 (Angle)
8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com
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