Watts F518 / F1518 User Manual
Classic series basic valves, Standard materials, Operating pressure
Classic Series Basic Valves
Job Name –––––––––––––––––––––––––––––––––––––––––––
Contractor ––––––––––––––––––––––––––––––––––––––––––––
Job Location –––––––––––––––––––––––––––––––––––––––––
Approval –––––––––––––––––––––––––––––––––––––––––––––
Engineer –––––––––––––––––––––––––––––––––––––––––––––
Contractor’s P.O. No. ––––––––––––––––––––––––––––––––––
Approval –––––––––––––––––––––––––––––––––––––––––––––
Representative ––––––––––––––––––––––––––––––––––––––––
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-F518-F1518
Standard Materials
Body & Cover:
Ductile Iron ASTM A536
Coating:
NSF Listed Fusion Bonded Epoxy Lined and
Coated
Trim:
316 Stainless Steel 2" – 8" (50 – 200mm)
ASTM B62 Bronze 10" – 16" (250 – 400mm)
(Stainless Steel Optional)
Elastomers:
Buna-N (standard)
EPDM (optional)
Viton
®
(optional)
Stem, Nut & Spring: Stainless Steel
Operating Pressure
Threaded = 400psi (27.6 bar)
150 Flanged = 250psi (17.2 bar)
300 Flanged = 400psi (27.6 bar)
Operating Temperature
Buna-N: 160°F (71°C) Maximum
EPDM: 300°F (140°C) Maximum
Viton
®
: 250°F (121°C) Maximum
F518 (Globe)
F1518 (Angle)
K
A
B
C
E
F
G
H I
J
D
L
M
N
F518 / F1518
Full Port Ductile Iron
Dual Chamber Basic Valve with
Mechanical Check Feature
The Watts ACV Models F518 and F1518 are full port, dual
chamber basic valves that incorporate a two-piece telescoping
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. The lower portion of this two-piece
assembly is a mechanical check feature, which acts indepen-
dent of diaphragm position or pilot control system, and provides
immediate check action when flow ceases.
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 dia-
phragm chamber and released from the upper diaphragm cham-
ber the valve travels to a full open position.
Model F518: Globe Pattern Dual Chamber Basic Valve with
Mechanical Check Feature.
Model F1518: Angle Pattern Dual Chamber Basic Valve with
Mechanical Check Feature.
Dimensions
Valve Size
Globe
Thread
Globe 150# Globe 300# Cover To
Center
Angle
Thread
Angle 150# Angle 300#
Angle
Thread
Angle 150# Angle 300# Port Size Port Size Port Size Port Size
Shipping
Weights*
A
B
C
D
E
F
G
H
I
J
K
L
M
N
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 in. mm lbs. kgs.
2
50
9
3
⁄
8
238 9
3
⁄
8
238
10
254 6
3
⁄
8
162
4
102
4
102 4
1
⁄
4
108
4
102
4
102 4
1
⁄
4
108
1
⁄
2
13
1
⁄
2
13
1
⁄
4
6
1
⁄
4
6
40
18
2
1
⁄
2
65
11
279
11
279 11
5
⁄
8
295 8
1
⁄
2
216 5
1
⁄
2
140 5
1
⁄
2
140 5
13
⁄
16
148
4
102
4
102 4
5
⁄
16
110
1
⁄
2
13
1
⁄
2
13
3
⁄
8
10
1
⁄
4
6
70
32
3
80 10
1
⁄
2
267
12
305 13
1
⁄
4
337 8
3
⁄
4
222 5
1
⁄
4
133 5
3
⁄
4
146 6
1
⁄
8
156 5
1
⁄
4
133 5
3
⁄
4
146 6
1
⁄
8
156
1
⁄
2
13
1
⁄
2
13
3
⁄
8
10
1
⁄
4
6
105
48
4
100
15
381 15
5
⁄
8
397 10
1
⁄
4
260
6
3
⁄
4
171 7
1
⁄
8
181
6
3
⁄
4
171 7
1
⁄
8
181
1
⁄
2
13
1
⁄
2
13
3
⁄
8
10
1
⁄
4
6
230
104
6
150
20
508
21
533
14
356
8
1
⁄
2
216 8
7
⁄
8
225
8
1
⁄
2
216 8
7
⁄
8
225
1
⁄
2
13
1
⁄
2
13
1
⁄
2
13
1
⁄
2
13 375
170
8
200
25
3
⁄
8
645 26
3
⁄
8
670 19
1
⁄
2
495
11
279 11
1
⁄
2
292
11
279 11
1
⁄
2
292
1
⁄
2
13
1
25
1
⁄
2
13
3
⁄
4
19 800
363
10
250
29
3
⁄
4
756 31
1
⁄
8
791 22
1
⁄
2
572
14
7
⁄
8
378 15
5
⁄
8
397
14
7
⁄
8
378 15
5
⁄
8
397
1
25
1
25
1
25
3
⁄
4
19 1100 499
12
300
34 864 35
1
⁄
2
902 24
3
⁄
4
629
17
432 17
3
⁄
4
451
17
432 17
3
⁄
4
451
1
25
1
25
1
25
1
25 1720 780
14
350
39 991 40
1
⁄
2
1029 26
660
1
25
1
25
1
25
1
25 2600 1179
16
400
41
3
⁄
8
1051 43
1
⁄
2
1105 30
1
⁄
2
775
1
25
1
25
1
25
1
25 3300 1497
*Estimated in lbs.