Double Block and Bleed Valve is a side-entry ball valve, with either a bolted or welded body, designed for use in upstream, midstream and downstream oil and gas applications. It requires two in-line isolation valves and a bleed valve used to drain or vent trapped fluid between the two closure elements in order to safely isolate the downstream pipe. This feature can be achieved with one single valves complete with a bleed port between the obturators.
Additional information
| Valve Size | 2" to 48" |
|---|---|
| Pressure Class Standard | ASME B16.34 |
| Pressure Class Range | Class 150, 300, 600, 900, 1500, 2500 |
| Body | 3-Piece Side-Entry, Top-Entry, Welded Body |
| End Connections | Integral Flange, Butt-Weld |
| Face-to-Face Standard | Manufacturer Standard |
| Bonnet | Standard |
| Packing | O-Ring, PTFE, Graphite, Lip Seals |
| Configuration | Dual Trunnion Mounted Ball & Operator |
| Trim | Reduced & Full Port |
| Seat Type | Double Block & Bleed (DBB), Double Isolation & Bleed (DIB-1 & DIB-2) |
| Seating | Metal-to-Metal & Soft |
| Shut-Off Classification | API 6D as per ISO 5208 Rate A, B, D |
Features & Benefits
- Initial and installation cost savings owing to reduced structural requirements of design that saves both space and weight
- Increased system reliability from single valve with bleed port between two valves
- Improved plant and personnel safety due to anti-blowout stem, fire-safe construction and anti-static design
- Plant and personnel protected by anti-blowout design that ensures the stem is retained by the stem cover
- Reduced actuation costs, as seat design minimizes the torque required to operate the valve without losing the sealing power
- Accurate machining of stem and bonnet sealing surfaces ensures compliance with the most severe pollution-control regulations
- Valbart trunnion-mounted ball valves are designed and certified Fire Safe to API 6FA, API 607, and ISO 10497
- Valves installed underground or in remote locations can be operated with an optional extended stem
Standards & Certifications
| Certifications | Canadian Registration Number (CRN) |
|---|---|
| Fire-Safe to API 6FA, API 607, ISO 10497 | |
| Design Standards | CSA Z245.15 – Steel Valves |
| API 6D – Specification for Pipeline and Piping Valves | |
| ASME B16.5 – Pipe Flanges & Flanged Fittings | |
| ASME B16.47 – Large Diameter Steel Flanges | |
| ASME B16.25 – Buttwelding Ends | |
| ASME B16.34 – Valve Flanged, Threaded, and Welding End | |
| ASME SA Materials | |
| ASTM A Materials | |
| Quality | IS0 9001:2008 |
| ATEX QAN | |
| IECEX QAR |
