Double Block & Bleed (DBB) Monoflange
The Double Block and Bleed (DBB) Monoflange represents a true technical and economical innovation. Differently from the old system made out of several (big) valves with multiple leak paths there is only 1 “flange” that incorporates all valves. The Monoflange valve can be made in 316 (standard) or exotic materials when required. They have compact dimensions with consequent reduction of installation costs & weight and as there is only 1 body the number of potential leak paths is reduced.
Features
- Rolled stem threads prevent galling
- Stem threads are completely isolated from the process
- Stem packing with graphite rings for bubble-tight seal
- Bolted bonnet for strength and reliability
- Stem tip construction: non-rotating self-centering
- Backseat design provides secondary stem sealing and prevents stem blowout
- Adjustable gland flange allows easy access to the packing gland and packing adjustment for an effective stem seal
- Robust handwheel
- Firesafe design
- Pressure rating up to 6,000 PSI (413 bar)
- Temperature rating: (Grafoil) -54°C / +510°C (-65°F / +950°F)
Downloads
Drawing:
monoflange-dbb-drawing
