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Forged Double Ball DBB Valve with Dual Gear Operation - China Factory Supplier for Oil & Gas Applications
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
What is a True Double Block and Bleed (DBB) isolation system?
A True Double Block and Bleed system utilizes two independent sealing members (balls) in a single valve body to provide positive dual isolation. This design replaces traditional multi-valve hookups, reducing leak paths, space, and weight while ensuring maximum safety during maintenance.
How does the integrated cavity vent facilitate online seal verification?
The integrated cavity vent allows operators to safely bleed off pressure from the internal cavity between the two main isolation barriers. By monitoring this vent, operators can verify if either seal is passing, enabling real-time integrity checks without shutting down the pipeline.
What are the safety benefits of forged trunnion construction?
Forged trunnion construction offers superior mechanical strength and structural integrity under high-pressure conditions. It features anti-static grounding, blowout-proof stem designs, and fire-safe certifications to prevent hazardous leaks in extreme operating environments.
Does the valve support pneumatic or electric actuators?
Yes. The valves are designed with standard ISO 5211 mounting flanges, making them fully automation-ready. They can easily integrate with pneumatic, electric, or hydraulic actuators for remote flow control and emergency shutdown systems.
Can these DBB valves be customized for specific project requirements?
Absolutely. We offer customization options regarding materials (carbon steel, stainless steel, duplex, or exotic alloys), pressure ratings (Class 150 to Class 2500), seat designs, and end connections to suit critical oil, gas, and petrochemical applications.