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Control systems Safety valves
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
Construction
3
3 = Cast iron
V = ASME Code Section I
ASME section
V
U = ASME Code section VIII Blank = Valve without code stamp
A =
1½" NPT x 2½" NPT
B =
2" NPT x 3"
NPT
C =
2½" NPT x 4"
NPT
D = NPT E = 1½" ANSI 250 x 2½" NPT F = 2" ANSI 250 x 2½ NPT G = 2" ANSI 250 x 3" NPT H = 2½" ANSI 250 x 3" NPT I = 2½" ANSI 250 x 4" NPT J = 3" ANSI 250 x 4 NPT L = 3" ANSI 250 x 4 3" NPT x 4"
Size and connection
A
4.7 104
ANSI 125
N = 4" ANSI 250 x 6"
ANSI 125
Q = 6" ANSI 250 x 8"
ANSI 125
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.
J
Set pressure
180
Specify set pressure from 5 psi g to 250 psi g
SV7
3
-
V
-
A
J
-
180
How to order Example: 1 off Spirax Sarco SV73-V-AJ-180 safety valve having a set pressure of 180 psi g.
TI-S13-25 CTLS Issue 12
Page 8 of 8
SV73 Cast Iron Safety Valve
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