Watts M400, M1400 User Manual
Mustang Series Basic Valves
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ES-ACV-M400-M1400
Job Name
Job Location
Engineer
Approval
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M400 / M1400
Full Port Ductile Iron Single
Chamber Basic Valve with
Mechanical Check Feature
The Watts ACV Models M400 and M1400 are full port, single
chamber basic valves that incorporate a two-piece disc and diaphragm assembly. This assembly is the only moving part within
the valve allowing it to open, close, or modulate as commanded
by the pilot control system. The lower portion of this two-piece
assembly is a mechanical check feature, which acts independent of diaphragm position or pilot control system, and provides
immediate check action when flow ceases.
Model M400: Globe Pattern Single Chamber Basic Valve with
Mechanical Check Feature.
Model M1400: Angle Pattern Single Chamber Basic Valve with
Mechanical Check Feature.
Contractor
Approval
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Contractor’s P.O. No.
Representative
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M400 (Globe) M1400 (Angle)
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Dimensions
Valve Size Globe 150# Globe 300# Cover To Center Angle 150# Angle 300# Angle 150# Angle 300# Port Size Port Size Shipping
A B C D E F G H I
in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs. kgs.
3 80 12 305 13
4 100 15 381 15
6 150 20 508 21 533 13
8 200 25
10 250 29
12 300 34 864 35
3
⁄8 645 263⁄8 670 16 406 123⁄4 324 131⁄4 337 8 203 111⁄2 292 1 25 1 25 650 295
3
⁄4 756 311⁄8 791 171⁄8 435 147⁄8 378 159⁄16 395 85⁄8 219 155⁄8 397 1 25 1 25 940 426
Standard Materials
Body & Cover: Ductile Iron ASTM A536
Coating: NSF Listed Fusion Bonded Epoxy Lined
1
⁄4 337 81⁄4 210 6 152 63⁄8 162 4 102 43⁄8 1111⁄2 131⁄2 13 95 43
5
⁄8 397 105⁄8 270 71⁄2 191 77⁄8 200 5 127 71⁄8 1813⁄4 193⁄4 19 190 86
1
⁄2 902 207⁄8 530 17 432 173⁄4 451 133⁄4 349 141⁄2 368 1 25 11⁄4 32 1500 680
3
⁄8 340 10 254 101⁄2 267 6 152 87⁄8 2253⁄4 193⁄4 19 320 145
Operating Pressure
150 Flanged = 250psi (17.2 bar)
300 Flanged = 400psi (27.6 bar)
and Coated
Trim: 316 Stainless Steel
Elastomers: Buna-N (standard)
EPDM (optional)
Viton
®
(optional)
Operating Temperature
Buna-N: 160°F (71°C) Maximum
EPDM: 300°F (140°C) Maximum
®
Viton
: 250°F (121°C) Maximum
Stem, Nut &
Spring: Stainless Steel
Weights*
*Estimated in lbs.
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.
M400 / M1400 — Full Port Ductile Iron Single Chamber Basic Valve with
Mechanical Check Feature
Flow Data - ACV M400 (Globe) / M1400 (Angle)
Valve Size - Inches 3 4 6 8 10 12 14 16
Maximum Continuous
Flow Rate Gpm (Water)
Maximum Intermittent
Flow Rate Gpm (Water)
Factor GPM (Globe) 100 175 490 770 1200 1750 2125 2890
C
V
Factor GPM (Angle) 125 215 571 990 1530 2525 2885 3575
C
V
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)
485 800 1850 3100 5000 7000 8500 11100
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 4 6 8 10 20 40 60 80 100 200 500 1000 2000 5000 10000 20000
3
3
4
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 3 4 6 8 10 12 14 16
fluid oz. 16 22 70
U.S. Gal 1-1/4 2-1/2 4 6-1/2 9-1/2
Valve Travel
Valve Size - Inches 3 4 6 8 10 12 14 16
Travel - Inches 3/4 1 1-1/2 2 2-1/2 3 3-1/2 4
A Watts Water Technologies Company
ES-ACV-M400-M1400 1219 © 2012 Watts
USA: Tel. (713) 943-0688 • (713) 944-9445 • www.watts.com
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