44
Control systems Safety valves
Table 4 - SV615 flow capacities for hot water in kilowatts (kW) at or above 100 °C (calculated in accordance with EN ISO 4126:2004) Derated coefficient of discharge (Kdr) = 0.52
Valve size DN in/out
15/20
20/32
25/40
32/50
40/65
50/80
Flow area (mm 2 )
113
314
452
661
1 075
1 662
Set pressure (bar g)
Flow capacity for hot water kW
0.5
29.96
83.26
119.86
175.27
285.06
440.71
1.0
40.60
112.81
162.39
237.47
386.21
597.09
1.5
51.23
142.36
204.92
299.66
487.36
753.47
2.0
61.86
171.96
247.45
361.86
588.51
909.86
3.0
83.13
230.99
332.51
486.24
790.81
1 222.62
4.0
104.39
290.08
417.57
610.63
993.11
1 535.38
5.0
125.66
349.17
502.63
735.02
1 195.42
1 848.15
6.0
146.92
408.26
587.69
859.41
1 397.72
2 160.91
7.0
168.19
467.36
672.75
983.80
1 600.12
2 473.67
8.0
189.45
526.45
757.81
1 108.18
1 802.32
2 786.43
4.7 36
9.0
210.72
585.54
842.88
1 232.57
2 004.62
3 099.20
10.0
231.98
644.63
927.94
1 356.96
2 206.92
3 411.96
11.0
253.25
703.72
1 013.00
1 481.35
2 409.22
3 724.72
12.0
274.51
762.81
1 098.06
1 605.74
2 611.52
4 037.49
13.0
295.78
821.90
1 183.12
1 730.12
2 813.82
4 350.25
14.0 16.0 18.0
317.04
880.99
1 268.18
1 854.51
3 016.12
4 663.01
359.58
999.17
1 438.30
2 103.29
402.11
1 117.36
1 608.42
2 352.06
Sizing and selection Refer to:- http://www.spiraxsarco.com/prs/product-sizing.asp
TI-P316-01 CTLS Issue 20
Page 8 of 10
SV615 Safety Valve
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