18061659285
Flanged × NPT/BSP Linked & Lockable 2500LB Reduced Bore DBB Double Ball Valve
Product Parameters
Valve Type |
Reduced Port Double Block and Bleed (DBB) Ball Valve |
Connection Size |
Flanged Inlet: 1" – 16" (DN25 – DN400) 1/2" – 2" NPT / BSP (Larger sizes available upon request) |
Pressure Rating |
Class 2500, Class 300 / 600 / 900 / 1500 optional |
Temperature Range |
-29°C to +425°C (depending on materials and seat design) |
Port Design |
Reduced Bore (Asymmetric Bore Design) |
Body Material |
ASTM A105N, A350 LF2, A182 F304 / F316, F51, F11, F22, Other materials available upon request |
Seat Material |
PTFE / RPTFE / PEEK / Metal Seated |
End Connection |
Flanged × High-Pressure Threaded (NPT or BSP) |
Body Structure |
Bolted Body / Split Body |
Stem Design |
Dual Independent Stems with Locking Devices |
Operation |
Manual Lever, Electric Actuator / Pneumatic Actuator (optional) |
Design Standards |
Designed in accordance with API 6D, ASME B16.34, BS 5351 |
Fire-Safe Design |
Designed in accordance with API 607 / API 6FA (optional) |
Brand |
SLVCN |
Key Features
True Double Block & Bleed Isolation
Two independent ball valves with a central bleed cavity provide positive upstream and downstream isolation with safe pressure release and verification.
Fixed Trunnion-Mounted Ball Design
Trunnion-mounted structure reduces operating torque and ensures stable sealing performance under high pressure conditions.
Asymmetric Flanged × Threaded Configuration
Flanged inlet combined with high-pressure threaded outlet enables compact and flexible installation in complex pipeline layouts.
Optimized for Sampling & Instrument Applications
Reduced bore design is ideal for sampling points, injection lines, and instrumentation branches without compromising isolation safety.
Dual Independent Lockable Stems
Independent stem bases with locking devices prevent accidental or unauthorized operation in hazardous environments.
Forged Steel Construction for Severe Service
Forged body materials with Class 2500 pressure rating ensure long-term reliability in Oil & Gas, offshore, and high-pressure chemical services.
Product Details
SLVCN Forged Steel Double Block and Bleed (DBB) Double Ball Valve is designed for high-pressure and high-risk isolation applications where absolute sealing integrity and operational safety are critical. Featuring a fixed trunnion-mounted DBB structure with two independent ball valves and a dedicated bleed cavity, the valve ensures complete upstream and downstream isolation with reliable pressure verification.
The valve adopts a reduced bore design with a flanged inlet and a high-pressure threaded outlet (NPT or BSP), enabling flexible installation in compact pipelines, sampling lines, and instrumentation branches where space is limited and safety requirements are stringent.
Manufactured from A105N forged carbon steel and rated up to Class 2500, this valve is suitable for severe service conditions in Oil & Gas production, offshore platforms, deepwater systems, and high-pressure chemical processes. Dual independent stem bases with locking devices, combined with a mechanical linked manual operation mechanism, further enhance operational safety and effectively prevent accidental or unauthorized operation in hazardous environments.
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