40
TM
Introduction
Servo-controlled relief valves are used in
natural gas transmission applications.
They assure accurate setting, perfect
closing, and high exhaust flow rate.
VS-FL and VS-FL-FR Series are in
conformity with the Pressure Equipment
Directive PED 97/23/EC and are classified
under Category IV.
Available Configurations
VS-FL Series
Type VS-FL-BP:
Low and Medium Pressure Applications
with Pilot Type PRX/182
Type VS-FL:
Medium and High Pressure Applications
with Pilot Types PRX/182 or PRX-AP/182
VS-FL-FR Series
Type VS-FL-FR-BP:
Low and Medium Pressure Applications
with Pilot Types PRX/182
Type VS-FL-FR-HP:
Medium and High Pressure Applications
with Pilot Types PRX/182, PRX-AP/182
All VS-FL and VS-FL-FR type relief valves
are available with or without:
Type SR:
Silencer
Body Sizes
VS-FL Series:
DN 25, 40, 50, 65, 80, 100, 150, 200*,
and 250*
(NPS 1, 1-1/2, 2, 2-1/2, 3, 4, 6, 8*, and 10*)
VS-FL-FR Series:
DN 25, 50, 80, 100, 150, 200*, and 250*
(NPS 1, 2, 3, 4, 6, 8*, and 10*)
* These sizes are not available in BP version
End Connection Styles
PN 16 / CL150, CL300, and CL600
• Ease of Installation
• Ease of Maintenance
• High Operation Accuracy
Features
Inlet Pressure Range
Flange Rating PN 16 / CL150:
Allowable Pressure: Up to 20 bar
Inlet Pressure Range: 0.2 to 20 bar
Flange Rating CL300, CL600:
Allowable Pressure: Up to 100 bar
Inlet Pressure Range: 1 to 100 bar
Set Range
Flange Rating PN 16 / CL150
0.5 to 19.3 bar
Flange Rating CL300, CL600
1 to 80 bar
Temperature Capabilities
VS-FL Series
Standard Version:
Working: -10° to 60°C
Low Temperature Version:
Working: -20° to 60°C
VS-FL-FR Series
Working: -20° to 60°C
Approximate Weights
(Including Pilot)
24 to 1190 kg
For full details consult the documenta-
tion available on our website:
VS-FL and VS-FL-FR Series
Relief Valves
Type vs-fl
