Products Categories

Products

Forged Reduced Bore Trunnion Mounted Ball Valve with Lockable Lever Handle

High-Integrity Double Ball DBB Trunnion Mounted Valve

Forged Double Ball DBB Valve with Dual Gear Operation

Large Diameter Fully Welded Ball Valve for Natural Gas Transmission Pipeline

Fully Welded Flanged Trunnion Mounted Ball Valve

High-Temperature Hard-Seal Fixed Ball Valve with DBB Structure

Durable High-Temperature Floating Ball Valve for Severe Environments (Up to 500°C)

Cryogenic Reduce Port Floating Ball Valve with Locking Device

Cryogenic Top Entry Floating Ball Valve with Extended Stem

Hydraulic Scotch Yoke Actuated Flanged Type Trunnion Mounted Ball Valve

Severe Service Metal Seated High-Integrity DBB Ball Valve for Critical Isolation.jpg

High-Integrity DBB Ball Valve Factory in China - Metal-Seated, Severe Service Design by Leading Suppliers

√ Severe Service DBB Ball Valves by a Leading China Supplier
Expertly designed and manufactured by a factory renowned for its expertise in hard-sealing double block and bleed (DBB) ball valve technology.

√ True DBB Structure with Optimized Sealing Loads
Guarantees reliable double isolation along with safe cavity pressure relief under ultra-high pressure conditions.

√ Heavy-Duty Gear-Operated Design
Ensures smooth and stable operation, ideal for large-bore, high-pressure applications in various industries.

√ Engineered to be Fire-Safe & Anti-Static
Incorporates essential safety features for hazardous and critical service environments.

√ Built for Essential Pipelines
Proven performance in Oil & Gas, Petrochemical, and severe process environments, making it the go-to choice among China suppliers.

Product Details

Key Features

Heavy-Duty Forged Body with Thick Flanged, Multi-Bolt Design

Forged valve body combined with thick flanges and multi-bolt connections, providing superior pressure containment, load distribution, and structural rigidity for severe service.

Trunnion-Mounted Ball Design for Severe Service

Fixed ball supported by upper and lower trunnions to minimize ball deflection, ensuring stable operation and reliable sealing under ultra-high pressure DBB service.

True DBB Configuration with Controlled Sealing Loads

Dual sealing seats provide complete upstream and downstream isolation, with controlled cavity pressure relief to enhance pipeline safety.

Proven Metal-Seated Sealing System

Metal-to-metal sealing technology engineered for high temperature, high pressure, and abrasive or corrosive media, delivering long-term sealing integrity.

Heavy-Duty Gear-Operated Mechanism for Large Sizes

Worm gear operation ensures controlled torque output and smooth, stable operation for large-bore, high-pressure applications.

Fire-Safe, Anti-Static & Anti-Blowout Safety Design

Integrated safety features designed in accordance with fire-safe and anti-static requirements, ensuring operational integrity in hazardous service conditions.

Frequently Asked Questions

Q What is a trunnion-mounted ball valve and why is it preferred for high-pressure service?

A trunnion-mounted ball valve features a ball that is mechanically anchored by upper and lower trunnion supports, preventing ball movement under pressure. This design significantly reduces operating torque and ensures reliable sealing performance in ultra-high pressure and severe service applications, making it the preferred choice over floating ball designs for large-bore, high-pressure pipelines.

Q What does DBB (Double Block and Bleed) configuration mean?

DBB stands for Double Block and Bleed. In this configuration, a single valve provides two independent seating surfaces that simultaneously block flow from both upstream and downstream directions, while a bleed port in the body cavity allows trapped pressure to be safely vented. This eliminates the need for multiple valves and enhances pipeline isolation safety.

Q What are the advantages of a metal-seated sealing system over soft-seated valves?

Metal-seated valves use metal-to-metal contact for sealing, making them suitable for extreme temperatures, high pressures, and abrasive or corrosive media where soft (elastomeric) seats would degrade. They offer superior durability and long-term sealing integrity in applications such as steam, high-temperature oil and gas, and chemical processing environments.

Q Why is a forged valve body with thick flanges and multi-bolt design important for severe service?

Forged valve bodies offer a denser, more uniform grain structure compared to cast bodies, resulting in higher mechanical strength and better resistance to pressure surges and fatigue. Thick flanges combined with multi-bolt connections distribute mechanical loads more evenly, reducing stress concentrations and ensuring leak-free performance under extreme operating conditions.

Q What are fire-safe and anti-static requirements in valve design?

Fire-safe design ensures that a valve maintains its pressure containment and sealing capability even if non-metallic components are destroyed by fire, typically verified by standards such as API 607 or ISO 10497. Anti-static design provides an electrical continuity path between the ball, stem, and body to prevent static charge buildup, which is critical in flammable or explosive media environments.

Q When should a gear-operated mechanism be used instead of a manual lever for ball valves?

Gear-operated (worm gear) mechanisms are recommended for large-bore or high-pressure ball valves where the operating torque exceeds safe manual handling limits. The worm gear provides a mechanical advantage that reduces the required input force, enabling smooth and controlled valve operation while protecting the stem and internal components from excessive torque loads.