Modular Double Block & Bleed (DBB) Valve

The working principle of Modular Double Block & Bleed (DBB) Valve is to control the flow of the medium by rotating the ball or ram and other components. When the valve needs to be closed, the stem is turned so that the ball or gate rotates or moves to the closed position, and the two sealing pairs simultaneously contact and seal the seat to achieve double truncation. When the residual medium or pressure in the cavity needs to be drained, the drain port can be opened.

VALVE DESIGN

API 6D, API 6A, ASME B16.34, ISO 14313, ISO 10423, ISO 17292

TEMPERATURE RANGE

-58 to 392°F (-50 to 200°C)

SIZE

NPS 1-12 (DN 25-300)

PRESSURE RATING

ASME 150 - ASME 2500

FACE-TO-FACE

As per API 6D standard

END CONNECTIONS

RF, RTJ as per B16.5 &B16.47
BW, Butt Welded as per B16.25
SW, Socket Welded as per B16.11

MATERIALS

Low Temperature and Low Alloy Carbon Steel

Stainless steel, Duplex and Super Duplex

Nickel alloys, Titanium

BODY DESIGN

Forged and casting bolted two-piece and three-piece

SEAT DESIGN

Soft or metal seated with Hard facing on ball and seats
Double piston seats
Combination seats

MAIN APPLICATIONS

•Offshore oil & gas production
•Gas & oil terminals
•Chemical & Petrochemical
•Refining
•Fiscal Metering Skid Manufacturing
•LNG gas carrier
•Process/ Power industr y contractors

ADVANTAGES

•Space and weight saving
•Cost saving (product & installation)
•Minimized leak paths
•Increased line structural integrity
•ESDV+MOV or ESDV+XV configurations
•Increasesd reliability of the system

CHARACTERISTICS

•Anti blow out/low emission stems
•Fire safe & anti-static design
•Independent ball and stem
•Self aligning trims
•Self relieving/ Double piston effect
floating seats
•Soft or metal seated

OPERATOR

Manual: wrench or Gear with padlocking
Actuated: Pneumatic/ Hydraulic/Electric

TESTING & CERTIFICATIONS

Compliance with API 6D & ISO 5208 & API 598 inspection and testing
Fire safe and fire tested as per API 607
SIL 3 Certification as per IEC61508
Fugitive Emission as per ISO15848
PED 2014/68/UE

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