Difference between sdv and sdv?

Difference between Blowdown Valve (BDV) and Shutdown Valve (SDV) ? Shutdown Valve (SDV) is an emergency shutdown valve in process control that work as safety device when there is emergency. Shutdown Valve referred to actuated valve which is closed during partial or total process shutdown of system to which the valve protects. SDV is an emergency shutdown valve in process control that work as safety device when there is emergency. Both are used in ESD (emergency shutdown) condition. Go to Specific Subject: Design of Shutdown (SDV) and Blowdown Valves (BDV). A shutdown valve is an actuated valve designed to stop the flow of a hazardous fluid upon the.