18061659285
Reducing Flanged Twin Ball Double Block and Bleed Valve
Product Parameters
Size |
1"–36" (DN25–DN900, larger sizes on request) |
Pressure Rating |
Class300 / 600 / 900 / 1500 / 2500 |
Operating Temperature |
–45°C to +250°C (depends on body and seat materials) |
Ball Type |
Trunnion-Mounted Twin Ball |
Body Construction |
1–3 Piece Integrated |
Body Sealing |
True Double Block & Bleed (DBB) with central bleed cavity |
End Connection |
Flanged (RF / RTJ) , Reducing Flanged Ends (One-side larger, one-side smaller) |
Operation |
Dual Manual Handles with Worm Gear; Pneumatic & Electric Actuation optional |
Mounting |
ISO 5211 Direct Mounting |
Body Material |
Forged Steel:ASTM A105 / WCB / 1.0619; Stainless Steel:ASTM A182 F316 / F316L; Duplex & Super Duplex optional |
Seat Materials |
PEEK, PCTFE (KEL-F), Devlon V, Metal Seat |
Design Standards |
Designed in accordance with API 6D, BS 5351, ASME B16.34 |
Fire-Safe Design |
Designed in accordance with API 607 / API 6FA |
Enhanced Safety |
Anti-Static, Anti-Blowout Stem, Fire-Safe Design |
Brand |
SLVCN |
Key Features
Integrated Reducing-End Design
Unequal flange sizes on inlet and outlet allow smooth diameter transition without additional reducers.
Twin Ball DBB Configuration
Two independent trunnion-mounted balls create double isolation, with a bleed cavity for pressure release and sealing verification.
Compact One-Body Construction
Integrated body design minimizes face-to-face length, ideal for space-limited piping and skid systems.
Central Bleed Port Functionality
Enables safe depressurization, leakage monitoring, and maintenance verification during operation.
Heavy-Duty Flanged Connection
RF or RTJ flanges ensure secure sealing performance under high-pressure and critical service conditions.
Independent Dual Handles
Clear visual indication of valve status and safer manual operation for upstream and downstream isolation.
Product Details
SLVCN Reducing Flanged Twin Ball Double Block & Bleed (DBB) Valve provides a single engineered solution that combines smooth pipeline diameter transition with verified double isolation. This compact design integrates reducing flanged ends into a true Twin Ball DBB configuration, eliminating the need for separate reducers and multiple valves.
The twin trunnion-mounted balls deliver reliable upstream and downstream isolation, while the central bleed port enables safe pressure release and on-site sealing verification, ensuring both operational safety and maintenance convenience.
Ideal for demanding Oil & Gas, Chemical, and skid-mounted process applications, this valve is engineered-to-order. Size, pressure class, materials, and seat options can be customized to meet specific project requirements, guaranteeing long-term reliability and performance.
Decades of Expertise
Tailored Solutions
Rigorous Quality Control
Proven Reliability
How We Ensure Quality & Reliability?
Quality is built into every stage - from raw material to final testing.
CE Certificate
ISO9001 Certificate
Certificate for Credit for Quality Service
Certificate of Observing Contract and Keeping Promise
Trademark Certificate
