Double Block and Bleed

Double Block and Bleed

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.

Brand: Valbart
Category: Trunnion Mounted
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

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

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

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