18061659285
Compact Twin-Ball Double Block and Bleed Valve with Reducing Flanged Ends
Product Parameters
Product Name |
Compact Reducing Flanged Twin-Ball Double Block and Bleed Ball Valve |
Valve Type |
Integrated Twin-Ball Double Block and Bleed Ball Valve |
Structure |
Two independent ball closures with intermediate bleed / drain connection |
Ball Design |
Floating ball design for smaller sizes; trunnion mounted design available for larger sizes or higher pressure by project confirmation |
Size Range |
1" - 12" / DN25 - DN300 as standard project range; larger sizes available by design confirmation |
Pressure Rating |
ASME Class 150 / 300 / 600 / 900; Class 1500 / 2500 available by project design |
End Connection |
Reducing RF / RTJ flanged ends; other flange standards available by project design |
Bore Type |
Full bore / reduced bore optional, subject to valve size and design confirmation |
Body Construction |
Compact integrated body, bolted body construction |
Body Material |
ASTM A105N, A350 LF2, A182 F304/F316, A182 F51/F53 optional |
Seat Material |
PTFE, RPTFE, PEEK, Devlon, PCTFE, Metal Seat optional by service condition |
Design Standards |
Designed in accordance with API 6D, BS 5351, ASME B16.34 |
Operation |
Dual manual handles; gear, pneumatic or electric operation available by project design |
Design & Test Standard |
ASME B16.34; API 598 / ISO 5208; API 6D available by project requirement |
Application |
Oil & Gas, Chemical, Petrochemical, Metering Skids, Instrument Isolation and Process Piping |
Documents |
MTC, pressure test report, inspection report and CO available |
Brand |
SLVCN |
Key Features
Integrated Reducing Flanged Design
Unequal flange sizes allow pipeline diameter transition within the valve body, helping reduce the need for separate reducers and additional flange joints.
Twin-Ball DBB Configuration
Two independent ball closures provide upstream and downstream shut-off, while the intermediate cavity supports double block and bleed isolation requirements.
Intermediate Bleed / Drain Function
The bleed / drain connection allows cavity pressure release, draining and leakage verification before maintenance, inspection, sampling or instrument removal.
Compact Integrated Body
Compared with a traditional reducer + block valve + bleed valve assembly, the compact integrated design helps reduce installation space, component quantity, overall weight and potential external leak paths.
Dual Manual Handle Operation
Two independent handles allow separate operation of each ball closure and provide clear visual indication of open / closed position.
Project-Based Material and Configuration Options
Body material, ball material, seat material, reducing flange size, bore type, pressure class, operation method and testing requirements can be customized according to actual service conditions.
Product Details
SLVCN Compact Reducing Flanged Twin-Ball Double Block and Bleed Ball Valve is designed for process piping, metering skids, oil & gas, chemical and petrochemical applications where pipeline diameter transition, double isolation and cavity pressure release are required in limited installation space.
The valve integrates two independent ball closures, reducing flanged ends and an intermediate bleed / drain connection into one compact body. Compared with a traditional arrangement using separate reducers, two block valves and one bleed valve, this integrated DBB design helps reduce installation length, flange joints, component quantity and potential external leak paths.
When both ball closures are closed, the cavity between the two balls can be vented, drained or monitored through the bleed connection. This supports leakage verification before maintenance, instrument removal, sampling or process line intervention.
Dual manual handles allow independent operation of both ball closures with clear visual indication of valve position. Body material, seat material, reducing flange size, bore type, pressure class, operation method and testing requirements can be customized according to project specifications.
For larger sizes, higher pressure or higher torque service, gear operation, pneumatic actuation, electric actuation or trunnion mounted design can be supplied according to project requirements.
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