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China Suppliers Factory Forged Twin-Ball DBB Ball Valve with Dual Gear Operation for Reliable Isolation
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.
Frequently Asked Questions
The compact integrated design significantly reduces installation space, total weight, pipe connection points, and potential external leak paths compared to conventional valve assemblies.
Two independent ball closures are engineered inside a single body, ensuring reliable upstream and downstream positive isolation for critical pipeline operations.
It allows venting of trapped cavity pressure, fluid draining, and positive verification of seat tightness prior to conducting maintenance or system interventions.
We offer soft and metal seat options including PTFE, RPTFE, PEEK, Devlon, and customized metal-to-metal seating matched to specific medium, pressure, and temperature profiles.
Two dedicated gearboxes provide smooth, balanced manual torque control over each individual ball closure under high operating pressures.
Yes, mounting style (floating or trunnion), body metallurgy, pressure classes, end connections, bore configurations, and actuation options are customizable.