Watts M1115 User Manual
PRESSURE REDUCING
CONTROL VALVE
02/09
Mustang series
Schematic
• Throttles to reduce high upstream pressure to
constant lower downstream pressure
P/L
(AOS)
3
Y/FC
X
1
FLOW
CLOSES VALVE
OPENS VALVE
M115 (Globe)
M1115 (Angle)
• Reducing setpoint is adjustable
2
Standard Components
1 – Main Valve (Single Chamber)
2 – Pressure Reducing Control
3 – Fixed Orice
Options & Accessories
XX
○ 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 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 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 pres-
sure. An increase in downstream pressure causes the valve to modulate toward a closed position, lowering
downstream pressure.
12541 Gulf Freeway • Houston, Texas 77034 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com
Mustang series
M115 (Globe)
M1115 (Angle)
Materials
Body & Cover: Ductile Iron ASTM A536
D
Coating: NSF Listed Fusion Bonded
Globe
K
Angle
L
K
Epoxy Lined and Coated
Trim: 316 Stainless Steel
K
Elastomers: Buna-N (standard)
EPDM
Viton
Stem, Nut & Stainless Steel
Spring:
A
B
C
E
F
G
H
Operating Pressure Operating Temperature Pilot System Tubing & Fittings
Threaded = 400 psi
150 Flanged = 250 psi
300 Flanged = 400 psi
Buna-N: 160°F Maximum
EPDM: 300°F Maximum
Viton: 250°F Maximum
Reducing Control
30-300 psi (Standard) Stainless Steel (Optional)
0-30 psi (Optional)
Copper / Brass (Standard)
Dimensions
A B C D E F G H I J K L
VALVE
SIZE
GLOBE
THRD.
GLOBE
150#
GLOBE
300#
COVER TO
CENTER
ANGLE
THRD.
ANGLE
150#
ANGLE
300#
ANGLE
THRD.
ANGLE
150#
ANGLE
300#
PORT
SIZE
PORT
SIZE
SHIPPING
WEIGHTS*
I J
1-1/4 7-1/4 5-1/2 3-1/4 1-7/8 3/8 1/4 20
1-1/2 7-1/4 8-1/2 9 5-1/2 3-1/4 4 4-1/4 1-7/8 4 4-1/4 3/8 1/4 25
2 9-3/8 9-3/8 10 6-1/2 4-3/4 4-3/4 5 3-1/4 3-1/4 3-1/2 3/8 1/2 40
2-1/2 11 11 11-5/8 7-1/2 5-1/2 5-1/2 5-7/8 4 4 4-5/16 1/2 1/2 65
3 12-1/2 12 13-1/4 8-1/4 6-1/4 6 6-3/8 4-1/2 4 4-3/8 1/2 1/2 95
4 15 15-5/8 10-5/8 7-1/2 7-7/8 5 5-5/16 3/4 3/4 190
6 20 21 13-3/8 10 10-1/2 6 6-1/2 3/4 3/4 320
8 25-3/8 26-3/8 16 12-3/4 13-1/4 8 8-1/2 1 1 650
10 29-3/4 31-1/8 17-1/8 14-7/8 15-9/16 8-5/8 9-5/16 1 1 940
12 34 35-1/2 20-7/8 17 17-3/4 13-3/4 14-1/2 1 1-1/4 1500
14 39 40-1/2 24-1/4 19-1/2 20-1/4 14-7/8 15-5/8 1 1-1/2 1675
16 41-3/8 43-1/2 25 20-13/16 21-5/8 15-11/16 16-1/2 1 2 3100
*Estimated in lbs.
Valve Cover Chamber Capacity
Valve Size (in) 1-1/4 1-1/2 2 2-1/2 3 4 6 8 10 12 14 16
.oz. 4 4 4 10 10 22 70
U.S. Gal - - - - - - -
- - - - -
1-1/4 2-1/2 4 6-1/2 9-1/2
Valve Travel
Valve Size (in) 1-1/4 1-1/2 2 2-1/2 3 4 6 8 10 12 14 16
Travel (in) 3/8 3/8 1/2 5/8 3/4 1 1-1/2 2 2-1/2 3 3-1/2 4
12541 Gulf Freeway • Houston, Texas 77034 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com
CAVITATION CHART
M115 (Globe)
Mustang series
Sizing
Size (in) 1-1/4 1-1/2 2 2-1/2 3 4 6 8 10 12 14 16
M1115 (Angle)
Maximum Continuous
(GPM)
Maximum Intermittent
(GPM)
Minimum Continuous
(GPM)
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.
95 130 210 300 485 800 1850 3100 5000 7000 8400 11100
119 161 265 390 590 1000 2300 4000 6250 8725 10500 13300
1 1 1 20 30 50 115 200 300 400 500 650
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.
INLET PRESSURE - PSI
300
280
CAVITATION ZONE
260
240
220
200
180
160
140
120
100
80
60
40
20
0 10 20 40 50 60 70 80 90
12541 Gulf Freeway • Houston, Texas 77034 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com
30
130 140120110100
OUTLET PRESSURE - PSI
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