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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

Fire-Safe Multi-Layer Stem Sealing Class 2500 F11 Trunnion Mounted Ball Valve.jpg

Fire-Safe Multi-Layer Stem Sealing Class 2500 Trunnion Mounted Ball Valve - China Suppliers Factory

Our trunnion-mounted Double Block and Bleed (DBB) design guarantees stable operation and secure cavity isolation, suitable for applications under Class 2500 pressure. As a leading manufacturer in China, we are committed to delivering products that meet the highest safety and performance standards.

The metal-to-metal hard sealing technology ensures zero-leakage performance, making it ideal for high-temperature, abrasive conditions, and frequent cycling operations. Our factory has rigorously tested these features to ensure reliability.

Designed with fire-safe and anti-static construction, our valves are equipped with multi-layer stem sealing to protect critical pipelines in hazardous environments, an essential characteristic for suppliers looking for quality and safety.

The heavy-duty gearbox, supported by high thrust bearings, provides smooth and controlled torque for large-size, ultra-high-pressure operations, reflecting our dedication as a top supplier in the valve industry.

Constructed from forged bodies that are precision machined, our products are factory-tested by SLVCN, ensuring they are reliable and adaptable for the most demanding oil and gas projects in the market.

Product Details

Key Features

Three-Piece Split Body + Heavy Flange Connection

Thick flanges and multi-bolt design ensure high strength, easy assembly, and convenient maintenance in severe service.

Anti-Blowout Stem & Multi-Layer Packing

Multi-stage stem with anti-blowout design, multi-layer packing, and thrust bearings ensure safe, leak-free performance under high pressure.

Fire-Safe & Anti-Static Design

Visible fire-safe coating and anti-static construction maintain sealing and safety in hazardous environments.

Trunnion Mounted Design

Upper and lower bearings support the ball, preventing displacement and ensuring stable operation at Class 2500.

Metal-Seated Hard Seal

Metal-to-metal sealing delivers reliable shut-off in high temperature, high pressure, abrasive, and frequent cycling service.

Gearbox Operation (Optional Electric/Pneumatic)

Industrial gearbox provides smooth torque control for large sizes, with optional electric or pneumatic actuation.

Frequently Asked Questions

What is the advantage of a three-piece split body design in a trunnion ball valve?

The three-piece split body with heavy flange connections allows each section to be disassembled independently for inspection or repair without removing the valve from the pipeline. This significantly reduces maintenance downtime and improves reliability in severe service applications.

How does the anti-blowout stem design protect against high-pressure leaks?

The anti-blowout stem features a mechanical retention structure that prevents the stem from being ejected due to internal pressure. Combined with multi-layer packing and thrust bearings, this design ensures a completely leak-free seal even under extreme pressure conditions, meeting stringent safety standards.

What does fire-safe and anti-static design mean for a ball valve?

A fire-safe design ensures that the valve maintains a reliable seal even if soft sealing components are damaged by fire, preventing dangerous leaks. The anti-static feature provides an electrical discharge path between the ball, stem, and body, eliminating static buildup that could ignite flammable media in hazardous environments.

Why is a trunnion mounted design preferred over a floating ball design at Class 2500?

In a trunnion mounted design, the ball is mechanically anchored by upper and lower bearings, so it does not move under line pressure. This significantly reduces operating torque, prevents seat wear, and ensures stable, precise shut-off performance at very high pressure ratings such as Class 2500, where a floating ball design would be impractical.

In what applications is a metal-seated hard seal ball valve recommended?

Metal-seated hard seal ball valves are recommended for high-temperature steam, abrasive slurry, corrosive media, and applications requiring frequent cycling where soft seat materials would degrade quickly. The metal-to-metal sealing provides long service life and consistent tight shut-off performance under the most demanding process conditions.

Can the gearbox-operated ball valve be automated with electric or pneumatic actuators?

Yes. While the standard configuration features an industrial gearbox for manual torque control on large valve sizes, the design supports optional electric or pneumatic actuation. This flexibility allows integration into automated control systems, remote operation environments, or applications where manual operation is not practical or safe.