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China Suppliers Compact Flanged Twin-Ball Double Block and Bleed Ball Valve Factory
Product Details
Designed for process piping, metering skids, instrument isolation, sampling systems, oil & gas, chemical and petrochemical applications where double block and bleed isolation, cavity pressure release and leakage verification are required within a compact installation space.
The valve integrates two independent ball closures and an intermediate bleed / drain connection into one compact body. Compared with a traditional arrangement using two separate block valves and one bleed valve, this integrated DBB valve design helps reduce installation length, flange joints, component quantity and potential external leak paths.
Cavity Venting & Leakage Verification
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, sampling, instrument removal or process line intervention.
Dual Independent Stems
Dual independent stems allow separate operation of both ball closures and provide clear isolation logic for operators. Flanged end connections support installation in process piping, metering skids and modular pipeline systems.
Engineering & Actuation Options
For smaller sizes, floating ball design is commonly used. For larger sizes, higher pressure or higher torque service, trunnion mounted design, gear operation, pneumatic actuation or electric actuation can be supplied according to project requirements.
Comprehensive Customization
Body material, seat material, pressure class, end connection, operation method, actuator mounting and testing requirements can be customized according to project specifications.
Frequently Asked Questions (FAQ)
It is designed for process piping, metering skids, instrument isolation, sampling systems, oil & gas, chemical and petrochemical applications where double block and bleed isolation, cavity pressure release, and leakage verification are required in compact spaces.
Compared with a traditional arrangement using two separate block valves and one bleed valve, the integrated design reduces 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, supporting leakage verification before maintenance, sampling, instrument removal, or process line intervention.
Dual independent stems allow separate operation of both ball closures, providing clear and reliable isolation logic for plant operators.
Floating ball design is standard for smaller sizes. For larger sizes, higher pressures, or higher torque applications, trunnion mounted designs, gear operation, pneumatic actuation, or electric actuation are available.
Yes. Body material, seat material, pressure class, end connections, operation methods, actuator mountings, and testing requirements can all be customized.