Super Duplex Double Block&bleed Ball Valves
Platinum valve DBB double ball valve apply material super duplex steel to promote the mechanical strength, corrosive resistance, and durability. Compared with normal Carbon steel DBB ball valve and Stainless steel ball valve,super duplex steel DBB ball valve have greatly improvement of mechanical properties and the long service life.
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
Super Duplex
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 of material Stainless steel and super duplex steel?
A: 1.Component
Stainless steel：Mian element is iron and it contains at least 11.5% chromium. From the perspective of its microstructure, it can be classified into austenite, ferrite, and martensite.For instance, austenitic stainless steel (such as 304, 316) has good corrosion resistance but lower strength, and ferritic stainless steel has a lower cost but weaker corrosion resistance.
Super duplex steel:It is a high-alloy duplex stainless steel with a chromium content of over 25% (for example, 2507 contains 25% chromium), and it also incorporates elements such as molybdenum and nitrogen to form a duplex structure where the austenite and ferrite each account for approximately 50%. This structure combines high strength and high toughness.
2. Mechanical performance
Super duplex steel：Super duplex steel performs better in environments with chloride ions (such as seawater and chemical media), and its resistance to pitting and crevice corrosion is far superior to that of common stainless steel. The tensile strength of super duplex steel can reach over 550 MPa, which is twice that of austenitic stainless steel (such as 316)And is suitable for high-pressure and high-stress working conditions.
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