18061659285
Forged Twin-Ball DBB Ball Valve with Dual Gear Operation
Product Parameters
| Product Name | Forged Twin-Ball DBB Ball Valve with Dual Gear Operation |
| Valve Type | Integrated Twin-Ball Double Block and Bleed Ball Valve |
| Structure | Two Independent Ball Closures with Intermediate Bleed / Drain Connection |
| Valve Design | Floating or Trunnion Mounted Design, depending on size, pressure class and project requirements |
| Size Range | 2"–24" / DN50–DN600, larger sizes available by project design |
| Pressure Rating | ASME Class 150 / 300 / 600 / 900, higher ratings available upon request |
| Bore Type | Full Bore / Reduced Bore optional |
| End Connection | RF / RTJ Flanged, Butt Welded Ends optional |
| Body Material | ASTM A105N, A350 LF2, A182 F304/F316, F51/F53, F11/F22 optional |
| Seat Material | PTFE, RPTFE, PEEK, Devlon, Metal Seat optional |
| Operation | Dual Worm Gear Operation, Electric / Pneumatic / Hydraulic Actuator optional |
| Temperature Range | -46°C to +200°C for soft seated design; up to +425°C for metal seated design, depending on material and seat configuration |
| Design Standard | API 6D, ASME B16.34 available by project requirement |
| Test Standard | API 6D / API 598 / ISO 5208 available |
| Application | Oil & Gas, Refinery, Petrochemical, Pipeline Isolation and Critical Process Service |
| Brand | SLVCN |
Key Features
Reliable Double Isolation
Two independent ball closures are integrated into one valve body, helping provide upstream and downstream isolation for critical pipeline and process applications.
Intermediate Bleed / Drain Function
The intermediate bleed / drain connection allows cavity pressure release, draining and leakage verification before maintenance, inspection or system intervention.
Project-Based Customization
Floating or trunnion mounted design, body material, pressure class, end connection, bore type, seat design, operation method, testing requirements and actuator options can be customized according to actual working conditions.
Compact Integrated DBB Body
Compared with a traditional two-block-valves-plus-one-bleed-valve assembly, the integrated design helps reduce installation space, connection points and potential external leak paths
Flexible Seat Configuration
PTFE, RPTFE, PEEK, Devlon and metal seat options can be selected according to medium, pressure, temperature and leakage requirements.
Dual Gear Operation
Two independent gear operators provide smooth manual control of both ball closures, especially for larger sizes or higher torque service conditions.
Product Details
SLVCN Forged Twin-Ball DBB Ball Valve with Dual Gear Operation is designed for oil & gas, refinery, petrochemical and critical pipeline isolation applications where reliable shut-off, cavity pressure release and leakage verification are required.
The valve integrates two independent ball closures and an intermediate bleed / drain connection within one compact body.
Compared with a traditional assembly using two separate block valves and one bleed valve, the integrated DBB design helps reduce installation space, connection points, overall weight 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 allows operators to verify isolation performance before maintenance, inspection or process line intervention.
Dual gear operation provides smooth and independent control of both ball closures, making the valve suitable for larger sizes or higher torque requirements compared with lever-operated designs.
Depending on valve size, pressure class and service conditions, the valve can be supplied with floating or trunnion mounted ball design. Soft seated and metal seated configurations are available according to medium, temperature, pressure and leakage requirements.
Body material, seat material, pressure class, end connection, bore type, bleed arrangement, operation method and testing requirements can be customized according to project specifications.
This integrated DBB ball valve is especially suitable for pipeline isolation, metering stations, refinery process units, petrochemical plants and critical shut-off points where double isolation and leakage verification are important.
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