RTJ Double Block&bleed Ball Valve
RTJ Double Block & Bleed Ball Valve combines the functions of Double Block and Bleed. The connection way of this valve is RTJ which adopts a RTJ ring based on connection way RF. The design will enforce the sealing performance and operate more stable.
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
RTJ as per B16.5 &B16.47
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 RF and RTJ of the ball valve?
A: RF Flange: The sealing surface is a raised surface. The seal is achieved by compressing a gasket (such as a metal wound gasket or non-metallic flat gasket). High requirements are placed on the material of the gasket and the alignment during installation. RTJ Flange: The sealing surface is a circular groove. It needs to be paired with an octagonal or elliptical metal ring gasket. The seal is formed by the line contact between the metal ring gasket and the groove. It has stronger pressure resistance performance.
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