Twin Seal DBB Plug Valves: The Gold Standard for Isolation

The FlowBiz Double Block and Bleed Plug Valve is a non-lubricated, resilient-seated valve designed for applications where absolute shut-off is mandatory. Unlike standard valves that drag their seals across the seating surface, our Twin Seal design utilizes a mechanical retraction system.

The "Zero Wear" Engineering Advantage

• Mechanical Retraction: Two independent seating slips are mounted on a tapered plug via dovetails. Before the plug rotates, the slips mechanically retract away from the seating surface. This eliminates friction and seal abrasion during opening and closing.
• Bubble-Tight Dual Seal: When closed, the plug forces the resilient slips against the valve body, creating two independent seals (Upstream and Downstream).
• Verifiable Integrity (Bleed): The valve features a bleed port that allows operators to drain the body cavity. If no fluid escapes the bleed valve while the main valve is closed, it proves with 100% certainty that both seals are holding perfectly.

Technical Specifications (2026 Series)

Critical Industry Applications

1. Oil & Gas Industry

Essential for Custody Transfer stations where precise measurement is required. Any leakage past the valve could lead to massive financial discrepancies or product contamination.

2. Aerospace & Aviation Refueling

Used in airport fuel hydrant systems and tank farms. The DBB plug valve ensures that different grades of aviation fuel never mix, maintaining the highest safety standards for flight.

3. Navigation & Marine Terminals

Ideal for loading and unloading manifolds at ports, where the valve must withstand harsh maritime environments while providing reliable isolation for various liquid cargos.

Why FlowBiz DBB Plug Valves?

• Eliminate Seal Abrasion: The lift-and-turn motion ensures the resilient seats last significantly longer than traditional ball or gate valves.
• Reduced Maintenance: Since the valve is non-lubricated and features a simple mechanical design, downtime for maintenance is drastically reduced.
• Compact Footprint: Replaces the need for two separate valves and a spool piece with a bleed valve, saving space and reducing weight in offshore or skid-mounted applications.

Global Manufacturing & Supply

As the leading DBB Plug Valve manufacturer in Mumbai, FlowBiz Exports serves a global market including Dubai, Turkey, Africa, and Southeast Asia. In India, we are the preferred supplier for key sectors in Gujarat (Vapi, Dahej, Ahmedabad) and Maharashtra (Pune, Nagpur, Nashik).

Is your process requiring absolute, verifiable isolation to prevent cross-contamination?

The FlowBiz Twin Seal DBB Plug Valve is engineered to provide the security you need. Contact our technical team today at +91 9016 989898 for a formal quote, GA drawings, and assistance with seating material selection for your specific media.

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