Full Bore Double Block&bleed Ball Valve
The "Double Block and Bleed Isolation priciple" necessitates the use of two inline isolation valves along with a bleed valve. This setup is employed to drain or vent any trapped fluid situated between the two closure elements, thereby ensuring the safe isolation of the downstream piping. Alternatively, this functionality can be achieved through the utilization of a single valve equipped with a bleed port positioned between its obturators.
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
FEATURES
Double block and bleed design (DBB)
Secondary seals in pure Graphite
Anti-Static Device
Anti Blow out stem
Emergency sealant injection on seats and stem available
Low fugitive emission stem packing available
O-ring /Lip seals and Graphite configuration
CRA overlay on all dynamic sealing areas or on all wetted parts available
Extended bonnet for low & high temperature available
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
MAIN APPLICATIONS
•Offshore oil & gas production
•Gas & oil terminals
•Chemical & Petrochemical
•Refining
•Fiscal Metering Skid Manufacturing
•LNG gas carrier
•Process/ Power industr y contractors
FAQ
Q: What is the function of the actuator?
A: The ball valve with actuator can achieve quickly cutoff, of which is very suitable for extremely working condition( high temperature and high pressure).
Q: How to get the price of actuator?
A: Firstly, we need you provide detailed specification of electric actuator or pnematical actuator which is very important for us to provide an accurate price for you. If you will purchase the actuator by yourself, we will privide detailed Torque value and ISO pad for you to select suitable actuator.
Q: What are differences between full bore and reduced bore?
A: DBB ball valve with full bore have low fluid resistance, which is making it suitable for pipelines that require regular pigging or the transportation of viscous media (such as crude oil and heavy oil). The reduced bore can be lighter and cheaper than the full bore one. Both kinds of bore can achieve bi-directional block and bleed, and can endure the high-pressure working condition.
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