18061659285
Forged Double Ball DBB Valve with Dual Gear Operation - China Suppliers and Factory for Zero-Risk Isolation
Key Features
True Double Block and Bleed Isolation
Two independent balls provide positive dual isolation, replacing traditional two-valve assemblies in one compact body.
Integrated Cavity Vent for Online Seal Verification
Allows pressure monitoring and safe cavity discharge to confirm seal integrity during operation.
Heavy-Duty Forged Trunnion Construction
Designed for high pressure service with fire-safe, anti-static, and blowout-proof safety protection.
Automation-Ready and Project Customizable
ISO 5211 interface with flexible materials, pressure ratings, and sizes for critical oil & gas applications.
Frequently Asked Questions
A Double Block and Bleed (DBB) ball valve features two independent seating surfaces that simultaneously block flow from both upstream and downstream directions. A bleed port between the two seats allows the trapped cavity pressure to be safely monitored and vented, providing positive dual isolation in a single compact valve body.
The integrated cavity vent allows operators to monitor pressure between the two seats and safely discharge any trapped fluid or gas without shutting down the entire system. This enables online seal verification, ensuring both seat seals are performing correctly during live operation — a critical safety feature for oil & gas pipelines and process systems.
The heavy-duty forged trunnion construction is engineered to meet fire-safe (API 607 / API 6FA), anti-static, and blowout-proof requirements. These features ensure the valve maintains structural integrity and prevents stem ejection under high-pressure and extreme temperature conditions, making it suitable for demanding upstream and midstream applications.
Yes. The valve features an ISO 5211 mounting interface, making it directly compatible with pneumatic, hydraulic, and electric actuators. This automation-ready design simplifies integration into remote-operated or automated control systems commonly used in oil & gas, petrochemical, and subsea pipeline applications.
Absolutely. The DBB ball valve is available in a wide range of sizes, pressure classes, and material configurations — including carbon steel, stainless steel, and duplex alloys — to meet specific project specifications. End connections, seat materials, coatings, and traceability documentation can all be tailored to suit critical oil & gas or industrial applications.
A conventional isolation setup typically requires two separate block valves plus a bleed valve — resulting in greater pipeline length, more flange connections, higher leak points, and increased weight. A DBB ball valve consolidates all three functions into a single compact body, reducing installation footprint, minimizing potential leak paths, lowering overall cost, and simplifying maintenance procedures.