High-Quality Class 600 Fully Welded Trunnion-Mounted DBB Ball Valve Manufacturers, Suppliers

● Zero External Leakage with Fully Welded One-Piece Body

● Maximum Pipeline Safety with Double-Block-and-Bleed (DBB)

● Stable High-Pressure Performance with Trunnion-Mounted Ball Design

● Fire-Safe Design with Emergency Sealing Capability

● Fail-Safe Operation with Anti-Blowout Stem and SPE / DPE Options

● Sour Service Capability with NACE MR0175-Compliant Materials

● Designed for Underground, Subsea, and Harsh Pipeline Environments

Product Description

Key Features

01

Zero External Leakage

Fully welded one-piece body eliminates external leakage paths, ideal for subsea, underground, and harsh pipeline environments.

02

Stable High-Pressure Performance

Trunnion-mounted ball design ensures reliable operation under high-pressure conditions and enhances load-bearing stability.

03

Maximum Pipeline Safety

Double Block-and-Bleed (DBB) design provides secure isolation, safe maintenance, and enhanced operational safety.

04

Fail-Safe Stem

Anti-blowout stem with anti-static protection ensures maximum safety in critical and flammable applications.

05

Sour Service Capability

NACE MR0175-compliant materials guarantee reliable performance in sour, corrosive, and challenging service conditions.

06

Long-Term Reliability

Fire-safe design and advanced sealing technology ensure long-term performance, supporting manual, electric, and pneumatic operation.

Product Description

SLVCN Class 600 Fully Welded Trunnion-Mounted DBB Ball Valve is designed for high-pressure and high-flow pipeline systems, including pumping and compression stations, subsea, underground, and other harsh service applications. Featuring a fully welded one-piece body, the valve eliminates external leakage paths and delivers reliable, long-term performance in critical operating conditions.

Engineered with a trunnion-mounted ball and Double Block-and-Bleed (DBB) design, the valve ensures stable operation, secure isolation, and safe maintenance. It is well suited for demanding applications in oil & gas, chemical & petrochemical, power generation, and other industrial sectors.

DBB Ball Valve

Parts List

Parts List Diagram
1Welding steel pipe10Seat19Seal Ring
2Seamless steel tube11Seat20Extension Stem
3Right Body12Ball21Bearing
4Spring13Trunnion Support22Extension Support

Technical Specifications

Technical Specifications

Dimensions: Class 600 - Full Port

NPS/DNB1 in/mmB2 in/mmWeight
2"1.941.9479
3"2.942.94154
4"3.943.94254
Valve Details

Frequently Asked Questions

1. What is the primary advantage of the fully welded body design?
The fully welded one-piece body design eliminates external leakage paths, making it highly reliable for subsea and underground pipeline environments.
2. Does the valve support sour service environments?
Yes, the valve is manufactured with NACE MR0175-compliant materials to ensure reliable performance in sour, corrosive, and challenging service conditions.
3. What is the benefit of the Double Block-and-Bleed (DBB) design?
The DBB design allows for secure isolation and safe maintenance of the valve, ensuring operational safety in critical pipeline systems.
4. Are the valves fire-safe?
Yes, our valves are engineered with a fire-safe design and advanced sealing technology to maintain integrity during emergency conditions.
5. Can the valve be customized for specific sizes?
Yes, the valve material, nominal size, seat, and sealing materials can be customized to meet specific working conditions and project requirements.

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