Watts M500, M1500 User Manual
Mustang Series Basic Valves
ES-ACV-M500-M1500
Job Name
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Job Location
Engineer
Approval
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Contractor
Approval
Contractor’s P.O. No.
Representative
M500 / M1500
Full Port Ductile Iron Dual Chamber
Basic Valve
The Watts ACV Models M500 and M1500 are full port, dual
chamber basic valves that incorporate a one-piece disc and diaphragm assembly. This assembly is the only moving part within
the valve, allowing it to open or close as commanded by the pilot
control system.
When pressure is applied to the upper diaphragm chamber and
released from the lower diaphragm chamber, the valve travels
to a closed position. When pressure is applied to the lower
diaphragm chamber and released from the upper diaphragm
chamber the valve travels to a full open position. When pressure
is balanced between the upper and lower diaphragm chambers,
the valve will hold an intermediate position until commanded to
modulate open or closed by the pilot control system.
Model M500: Globe Pattern Dual Chamber Basic Valve
Model M1500: Angle Pattern Dual Chamber Basic Valve
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M500 (Globe) M1500 (Angle)
L
D
K
M
K
A
B
C
K
HIJ
E
F
G
Dimensions
Valve Size Globe
in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs. kgs.
2 50 9
1
2
⁄2 65 11 279 11 279 115⁄8 295 105⁄16 262 51⁄2 140 51⁄2 140 57⁄8 149 4 102 4 102 45⁄16 1101⁄2 131⁄2 131⁄2 13 70 32
3 80 12
4 100 15 381 15
6 150 20 508 21 533 18
8 200 25
10 250 29
12 300 34 864 35
14 350 39 991 40
16 400 41
Standard Materials
Body & Cover: Ductile Iron ASTM A536
Coating: NSF Listed Fusion Bonded Epoxy Lined
Trim: 316 Stainless Steel
Elastomers: Buna-N (standard)
Stem, Nut & Spring: Stainless Steel
Globe 150# Globe 300# Cover To
Thread
A B C D E F G H I J K L M
3
⁄8 238 93⁄8 238 10 254 89⁄16 217 4 102 43⁄4 121 5 127 31⁄4 83 31⁄4 83 31⁄2 893⁄8 101⁄2 131⁄4 6 45 20
1
⁄2 318 12 305 131⁄4 337 113⁄16 284 61⁄4 159 6 152 63⁄8 162 41⁄2 114 4 102 43⁄8 1111⁄2 131⁄2 131⁄2 13 100 45
3
⁄8 645 263⁄8 670 2113⁄16 554 123⁄4 324 131⁄4 337 8 203 81⁄2 216 1 25 1 25 1 25 665 302
3
⁄4 756 311⁄8 791 233⁄8 594 147⁄8 378 159⁄16 395 85⁄8 219 95⁄16 237 1 25 1 25 1 25 980 445
3
⁄8 1051 431⁄2 1105 35 889 2013⁄16 529 215⁄8 549 1511⁄16 398 161⁄2 419 1 25 2 51 1 25 3300 1497
5
⁄8 397 141⁄4 362 71⁄2 191 77⁄8 200 5 127 55⁄16 1353⁄4 193⁄4 191⁄2 13 200 91
1
⁄2 902 295⁄16 745 17 432 173⁄4 451 133⁄4 349 141⁄2 368 1 25 11⁄4 32 1 25 1720 780
1
⁄2 1029 32 813 191⁄2 495 201⁄4 514 147⁄8 378 155⁄8 397 1 25 11⁄2 38 1 25 2600 1180
Center
7
⁄16 468 10 254 101⁄2 267 6 152 61⁄2 1653⁄4 193⁄4 193⁄4 19 340 154
Angle
Angle 150# Angle 300# Angle
Thread
Angle 150# Angle 300# Port Size Port Size Port Size Shipping
Thread
Weights*
*Estimated in lbs.
Operating Pressure
Threaded = 400psi (27.6 bar)
150 Flanged = 250psi (17.2 bar)
and Coated
300 Flanged = 400psi (27.6 bar)
Operating Temperature
EPDM (optional)
®
Viton
(optional)
Buna-N: 160°F (71°C) Maximum
EPDM: 300°F (140°C) Maximum
®
Viton
: 250°F (121°C) Maximum
Viton® is a registered trademark of DuPont Dow Elastomers.
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
M500 / M1500 — Full Port Ductile Iron Dual Chamber Basic Valve
Flow Data - ACV M500 (Globe) / M1500 (Angle)
Valve Size - Inches 2 2-1/2 3 4 6 8 10 12 14 16
Maximum Continuous
Flow Rate Gpm (Water)
Maximum Intermittent
Flow Rate Gpm (Water)
CV Factor GPM (Globe) 45 75 100 175 490 770 1200 1750 2125 2890
CV Factor GPM (Angle) 57 91 125 215 571 990 1530 2525 2885 3575
Maximum continuous flow based on velocity of 20 ft. per second.
Maximum intermittent flow based on velocity of 25 ft. per second.
The Cv Factor of a value is the flow rate in US GPM at 60°F that will cause a 1psi drop in pressure.
The factors stated are based upon a fully open valve.
Cv factor can be used in the following equations to determine Flow (Q) and Pressure Drop (∆P):
Q (Flow) = Cv√∆P ∆P (Pressure Drop) = (Q/Cv)
210 300 485 800 1850 3100 5000 7000 8500 11100
265 390 590 1000 2300 4000 6250 8900 10800 14100
2
Estimated
Headloss
100
80
60
40
30
20
10
8
6
4
Pressure Drop (psi)
3
2
Angle
Globe
2
2 4 6 8 10 20 40 60 80 100 200 500 1000 2000 5000 10000 20000
2
2-1/2
2-1/2
3
4
3
4
6
8
6
8
10
12
10
14
12
16
14
16
Flow Rate - Gallons per minute (Water)
Valve Cover Chamber Capacity
Valve Size - Inches 2 2-1/2 3 4 6 8 10 12 14 16
fluid oz. 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 - Inches 2 2-1/2 3 4 6 8 10 12 14 16
Travel - Inches 1/2 5/8 3/4 1 1-1/2 2 2-1/2 3 3-1/2 4
A Watts Water Technologies Company
ES-ACV-M500-M5100 1219 © 2012 Watts
USA: Tel. (713) 943-0688 • (713) 944-9445 • www.watts.com
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