Control systems Safety valves
4
Safety information, installation and maintenance For full details see the Installation and Maintenance Instructions (IM-S13-33) supplied with the product.
Installation note: The safety valve should always be fitted with the centre line of the spring housing vertically above the valve. SV7 safety valve selection guide Series number SV7
SV7
4
Construction
4 = Cast steel
V = ASME Code Section I
ASME section
V
U = ASME Code section VIII Blank = Valve without code stamp
1 ½ " ASME 300 x 2" ASME 150
S =
1 ½ " ASME 300 x 2 ½ " ASME 150
T =
U =
2" ASME 300 x 3" ASME 150
2 ½ " ASME 300 x 4" ASME 150
X
V =
Size and connection
W =
3" ASME 300 x 4" ASME 150
X =
4" ASME 300 x 6" ASME 150
4.7 113
Y =
6" ASME 300 x 8" ASME 150
F = 0.328
G = 0.537 H = 0.841 J = 1.374 K = 1.968 L = 3.054 M = 3.846 N = 4.633 P = 6.830 Q = 11.811 R = 17.123
Actual orifice area Sq. In.
P
Set pressure
180
Specify set pressure from 5 psi g to 250 psi g
SV7
3
-
V
-
A
Z
-
180
How to order Example 1: 1 off Spirax Sarco SV74-V-XP-180 safety valve having a set pressure of 180 psi g.
TI-S13-30 CTLS Issue 16
Page 9 of 9
SV74 Carbon Steel Safety Valve
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