SV Type MSSV Globe Valve

Main steam safety valve

Safety valve, actuated by the medium in the system, using pressurizing principle. Opening is possible, using either solenoid or spring-loaded pilot valve.

Used as a main steam safety valve in BWR and PWR.

Size up to 11”( 280 mm).
Class up to 1500.
Forged/cast carbon or stainless steel.
Variety of different qualification programs for water and two-phase flows.

Benefits of SV Type MSSV Globe Valve

Stable performance and very high tightness classes.
Unique spindle-cover feature stabilizes the SV opening in case of phase transitions.
Usage of all possible medium (steam, water, transitions, air, hydrogen).
Stable operations under transient (tolerate thermal shock for rapid plant start up), due to the flexible seat.
Set point accuracy + 1%, no set point drift.
Opening & closing with auxiliary medium possible if no power.
Controlled opening & closing speed to reduce dynamic pipe load (linear lift characteristic).
No chattering, no simmering.
No risk of inadvertent opening.
Integral valve position indication for control room monitoring.