1 Piece Double Block&bleed Ball Valve
1 Piece Double Block&bleed Ball Valve, which is a high pressure ball valve that combines the function of double block and bleed. Platinum valve design it for pipe to transport high-dangerous fluid. The body structure is intergal and compact, which is greatly reducing the F-TO-F dimension to better use to compact pipe line. The valve is widely applying for Oil and Natural gas transportation,Chemical industy, etc. Doule closure element can ensure that stability of operation and offer high sealing performance.
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 /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
FAQ
Q: What are the differences between One-piece DBB ball valve and Split DBB ball valve?
A: 1. Structure design
Integral DBB ball valve: Doulble block and bleed function in single module, forged from premium material, compact structure, no leakage risk.
Split DBB ball valve: Split body forged from premium material, Convenient maintainance, 2-piece body or 3-piece body.
2. Sealing performance
Integral DBB ball valve: Integral forge body is suitable for high pressure and high temperature working condition.
Split DBB ball valve: Split forge body have more connecting points, so the sealing performance will be impacted subtlely.
3.Maintainance cost
Integral DBB ball valve: high
Split DBB ball valve: low
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