44
Control systems Safety valves
Pressure/temperature limits
Steam saturation curve
Pressure bar g
Maximum set pressure for 1½" and 2" SV615
Maximum set pressure for ½" to 1¼" SV615
The product must not be used in this region.
A - A B - B C - C D - D
Maximum operating temperature with metal seat.
Maximum operating temperature with Viton seat.
Maximum operating temperature with EPDM seat.
Maximum operating temperature with Nitrile seat.
4.7 30
Body design conditions
PN25
½" to 1¼"
18 bar g
Maximum
1½" and 2"
14 bar g
Set pressure range
Minimum
0.3 bar g
Minimum
-90 °C
Metal seat
Maximum
+230 °C
Minimum
-30 °C
* Nitrile seat
Maximum
+120 °C
Temperature
Minimum
-50 °C
* EPDM seat
Maximum
+150 °C
Minimum
-20 °C
* Viton seat
Maximum
+200 °C
Steam
5%
Overpressure
Gas
10%
Liquid
10%
Steam, gas
10%
Performance data
Blowdown limits
Liquids
20%
Steam, gas
0.71
Derated coefficient of discharge values
Liquid
0.52
Maximum permitted backpressure
10% of set pressure
Tested at a maximum inlet cold hydraulic test pressure of:
37.5 bar g
* Note: Soft seal inserts are not suitable for steam applications.
TI-P316-01 CTLS Issue 20
Page 2 of 10
SV615 Safety Valve
Powered by FlippingBook