User guide
Stainless Steel Series Basic Valves
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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 with-
out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
ES-ACV-S500-S1500
Standard Materials
Body, Cover & 304L Stainless Steel (standard)
Flanges: 316L Stainless Steel (optional)
Trim: 316 Stainless Steel
Elastomers: Buna-N (standard)
EPDM
Viton
®
Stem, Nut & Spring: Stainless Steel
Operating Pressure
150 Flanged = 250psi (17.2 bar)
Operating Temperature
Buna-N: 160°F (71°C) Maximum
EPDM: 300°F (140°F) Maximum
Viton
®
: 250°F (121°C) Maximum
Dimensions
S500 (Globe) S1500 (Angle)
S500 / S1500
Full Port Stainless Steel
Dual Chamber Basic Valve
The Watts ACV Models S500 and S1500 are full port, dual
chamber basic valves that incorporate a one-piece disc and dia-
phragm 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.
The Stainless Steel design offers superior corrosion resistance,
as well as a lightweight alternative to conventional heavy iron
valves. Stainless Steel construction reduces corrosion, reducing
diaphragm wear and the frequency and labor costs associated
with traditional maintenance repairs.
Model S500: Globe Pattern Dual Chamber Basic Valve
Model S1500: Angle Pattern Dual Chamber Basic Valve
Valve Size Globe 150# Globe 300# Cover To Center Angle 150# Angle 300# Angle 150# Angle 300# Port Size Port Size Port Size Shipping
Weights*
A B C D E F G H I J
in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs. kgs.
4 100 15 381 15
5
⁄8 397 14
1
⁄4 362 7
1
⁄2 191 7
7
⁄8 200 5 127 5
5
⁄16 135
1
⁄2 13
3
⁄4 19
1
⁄2 13 87 39
6 150 20 508 21 533 18
7
⁄16 468 10 254 10
1
⁄2 267 6 152 6
1
⁄2 165
1
⁄2 13
3
⁄4 19
1
⁄2 13 178 81
8 200 25
3
⁄8 645 26
3
⁄8 670 21
13
⁄16 554 12
3
⁄4 324 13
1
⁄4 337 8 203 8
1
⁄2 216 1 25 1 25
1
⁄2 13 240 109
10 250 29
3
⁄4 756 31
1
⁄8 791 23
3
⁄8 594 14
7
⁄8 378 15
9
⁄16 395 8
5
⁄8 219 9
5
⁄16 237 1 25 1
1
⁄4 32
1
⁄2 13 397 180
12 300 34 864 35
1
⁄2 902 29
5
⁄16 744 17 432 17
3
⁄4 451 13
3
⁄4 349 14
1
⁄2 368 1 25 1
1
⁄4 32 1 25 480 217
16 400 41
3
⁄8 1051 43
1
⁄2 1105 35 889 20
13
⁄16 529 21
5
⁄8 549 15
11
⁄16 398 16
1
⁄2 419 1 25 1
1
⁄2 38 1 25 925 420
*Estimated in lbs.
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H
A
B
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