DBB Ball Valve

DBB ball valve(Twin ball)

ONERO double block and bleed valves combine two in-line isolation valves into a single body with an additional bleed valve used to drain or vent trapped fluid between the two obturators to ensure highest level of safety in double isolation and bleed service. Using a double block and bleed valve versus two separate valves saves weight and space on the piping layout and ensures a significant reduction of potential leakage to the atmosphere, minimizing any hazardous risk when transferring liquids or gas. 

Technical Specification

· Design: API6D / API 6A

· Face to Face: ASME B16.10 / API 6D

· Flanged Ends: ASME B16.5 /ASME B16.47/ASME B 16.25

· BW Ends: ASME B16.25

· Test & inspection : API 598/API6D

· Fire Safe Test: API 607/API6FA

· Special: NACE MR-01-75

Product Range

Body material: Carbon steel, Stainless steel, Alloy steel ,Monel, Duplex, Inconel,etc
Size range: 2"～60"

End Connection: RF, RTJ, BW

Pressure rating: Class150～Class2500

Working temperature:-46℃～+230℃

Mode of operation: Gear box, Electric actuator, Pneumatic actuator, hydraulic actuator, etc.

Features and Benefits
• Double block and bleed design (DBB)
• Secondary seals in pure Graphite
• Anti-static device
• Anti-blowout stem
• O-ring / Lip seal configuration
• Emergency sealant injection on seats and stem available
• Low fugitive emission stem packing available
• CRA overlay on all dynamic sealing areas or on all wetted parts available
• Low pressure loss through the valve

● Minimized Leak Paths

● Increased Line Structural Integrity

● ESDV+MOV Or ESDV+XV Configurations

● Increased Reliability Of The System

● Fire Safe & Anti-Static Design

● Independent Ball And Stem

● Self Relieving/ Double Piston Effect