Manual
ES-152A 0403 © Watts Regulator Co., 1996 Printed in U.S.A.
USA: 815 Chestnut St., No. Andover, MA 01845-6098; www.wattsreg.com
Canada: 5435 North Service Rd., Burlington, ONT. L7L 5H7; www.wattscanada.ca
A
D
C
Flow
Flow
Flow
Pressure Drop
Pressure Drop
Pressure Drop
Series 152A
Adjusting Spring Range Chart
SIZE *ADJUSTABLE RANGES SPRING AND MODEL NO.
in. mm psi bars
1
⁄
2
15 3 – 15 .21 – 1.05 145
1
⁄
2
15 10 – 50 .70 – 3.51 146
1
⁄
2
15 30 – 140 2.11 – 9.84 141
3
⁄
4
20 3 – 15 .21 – 1.05 145
3
⁄
4
20 10 – 50 .70 – 3.51 146
3
⁄
4
20 30 – 140 2.11 – 9.84 141
1253 – 15 .21 – 1.05 146
12510 – 30 .70 – 2.11 128
12530 – 140 2.11 – 9.84 142
1
1
⁄
4
32 3 – 15 .21 – 1.05 146
1
1
⁄
4
32 10 – 30 .70 – 2.11 128
1
1
⁄
4
32 30 – 140 2.11 – 9.84 142
1
1
⁄
2
40 5 – 40 .35 – 2.81 276
1
1
⁄
2
40 30 – 100 2.11 – 7.03 299
2505 – 40 .35 – 2.81 276
25030 – 100 2.11 – 7.03 299
*The minimum reduced pressure ranges shown are recommended
only when very sensitive regulation service is needed for specific
requirements. However, all valves may be adjusted below the working
range minimums shown for lower regulation or complete shut off.
SIZE (DN) DIMENSIONS WEIGHT
AC D
in. mm in. mm in. mm in. mm lbs. kg.
1
⁄
2
15 6 152 7 178 1
15
⁄
16
49 11 4.99
3
⁄
4
20 6 152 7 178 1
15
⁄
16
49 11 4.99
1257
1
⁄
2
191 7
1
⁄
2
191 2
3
⁄
16
56 20 9.07
1
1
⁄
4
32 7
1
⁄
2
191 7
1
⁄
2
191 2
3
⁄
16
56 20 9.07
1
1
⁄
2
40 9 229 11
1
⁄
4
286 2
3
⁄
4
70 40 18.14
2509229 11
1
⁄
4
286 2
3
⁄
4
70 40 18.14
bars psi
1.4 20
1.0 15
0.7 10
0.3 5
00
24681012 gpm
7.6 15.2 22.8 30.4 38 45.6 lpm
bars psi
1.4 20
1.0 15
0.7 10
0.3 5
00
bars psi
1.7 25
1.4 20
1.0 15
0.7 10
0.3 5
00
510152025303540gpm
19 38 57 76 95 114 133 152 lpm
5101520253035gpm
19 38 57 76 95 114 133 lpm
Quick Reference Capacity Chart For Average Conditions
From From From From From From From From From
psi bar psi bar psi bar psi bar psi bar psi bar psi bar psi bar psi bar
Initial Pressure 50 3.52 75 5.27 100 7.03 125 8.79 150 10.55 175 12.3 200 14.06 225 15.82 250 17.58
Up To Up To Up To Up To Up To Up To Up To Up To Up To
Reduced Pressure 20 1.41 35 2.46 50 3.52 60 4.22 70 4.92 80 5.62 90 6.33 100 7.03 125 8.79
in. mm *Maximum Capacities in Lbs. of Steam Per Hour
152A
1
⁄
2
"1580111 143 175 205 237 270 299 332
152A
3
⁄
4
"20285 394 506 620 726 841 956 1060 1178
152A 1" 25 402 557 715 875 1025 1186 1349 1497 1663
152A 1
1
⁄
4
"32442 613 786 962 1127 1305 1484 1646 1830
152A 1
1
⁄
2
"40665 870 1120 1355 1600 1950 2230 2460 2725
152A 2" 50 765 1000 1285 1490 1840 2242 2564 2829 3134
*1 Lb. Steam Equals 970 BTU Per Hour
Capacity
152A Size
1
⁄2" (15mm)
152A Size
3
⁄4" (20mm)
152A Size 1" (25mm)
Range 30 - 140
Range 10 - 50
Range 3 - 15
Range 30 - 140
Range 10 - 50
Range 3 - 15
Range 30 - 140
Range 10 - 50
Range 3 - 15
Dimensions — Weights