Double Block and Bleed ( DBB for Short ) & Single Block and Bleed ( SBB for Short )
Double Block and Bleed features two valves, providing dual isolation to ensure complete separation of the fluid pipeline system. The single Block and Bleed is characterized by a single valve that provides a single isolation to separate different parts within the piping system.
Design Feature:
- Single ball/disc for SBB ;
- Double ball for DBB
- Forging Body
- Trunnion or Floating type
- anti blow-out stem and typically SPE seat design.
- Drain port is normally provided with a floating ball valve
- Locking device
