China Class 600 Scotch Yoke Fixed Trunnion-Mounted Ball Valve with DBB Structure Supplier, Factories

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China Class 600 Scotch Yoke Fixed Trunnion-Mounted Ball Valve with DBB Structure Supplier, Factories

â— DBB Double Block & Bleed: Zero leakage with dual seat & independent bleed cavity for reliable isolation.

â— Top Entry Design: Quick in-line maintenance, reducing downtime by up to 80%.

â— Scotch Yoke Pneumatic Actuator: Fast response, low energy consumption (30% less than traditional cylinders).

â— Metal Seated & Fixed Ball: Superior wear resistance and extended lifespan in high-pressure conditions.

â— Bi-Directional Sealing: Reliable sealing with no installation direction restrictions.

â— Wide Temperature Range: Handles -40â„ƒ to 550â„ƒ and complex media types.

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Product Description

Key Features

DBB Visual Monitoring for Bleed Cavity

The bleed port allows connection to a pressure gauge or discharge pipe, enabling real-time cavity pressure monitoring. This provides early detection of potential leaks, ensuring continuous, safe operation.

Top Entry Seal Upgrade

The top-entry design features multi-layer packing combined with metal bellows, preventing stem leakage. Ideal for handling high-pressure, hazardous media, it ensures reliable sealing under extreme conditions.

Scotch Yoke Actuator with No Dead Zone

The actuator’s dead-zone-free design ensures precise synchronization between valve movement and signal commands, delivering smooth control, especially in automated processes.

Fixed Ball with Low Torque Advantage

Upper and lower bearings support the ball, ensuring even load distribution on the seat. This reduces operating torque by 40% compared to floating ball valves, prolonging actuator life and enhancing performance.

Product Description

The 600LB Scotch Yoke Fixed Trunnion-Mounted Ball Valve is designed for efficient and secure shutoff in medium to high-pressure industrial pipelines. Featuring a Double Block and Bleed (DBB) system, it ensures bidirectional zero leakage and continuous monitoring of sealing status. The top-entry design allows for easy maintenance without removing the valve from the pipeline, reducing downtime and operational costs.

Equipped with a Scotch yoke pneumatic actuator, this valve offers quick response and high energy efficiency, making it ideal for automated control applications. The metal-seated and fixed ball design provides superior durability under high-pressure, high-temperature, and abrasive media conditions, making it perfect for critical applications in the oil, gas, and chemical industries.

This valve is the ideal choice for industries requiring high safety, durability, and maintenance efficiency, ensuring reliable performance in demanding environments.

Technical Specifications & Parts List

Dimensions: Class 600 - Full Port

Size NPS/DN	Bore (B1/B2)		FT RF (in/mm)	FT RTJ (in/mm)	FT BWE (in/mm)	D2 (in/mm)	Weight (lb/kg)
2" / 50	1.94 / 49	1.94 / 49	11.5 / 292	11.63 / 295	11.50 / 292	7.5 / 190	132 / 60
3" / 80	2.94 / 74	2.94 / 74	14 / 356	14.13 / 359	14 / 356	9.4 / 240	287 / 130
4" / 100	3.94 / 100	3.94 / 100	17 / 432	17.13 / 435	17 / 432	11.4 / 290	529 / 240
6" / 150	5.94 / 150	5.94 / 150	22 / 559	22.13 / 562	22 / 559	14.6 / 370	628 / 285
8" / 200	7.94 / 201	7.94 / 201	26 / 660	26.13 / 664	26 / 660	20.5 / 521	1235 / 560

Dimensions: Class 600 - Reduced Port

Size NPS/DN	Bore (B1/B2)		GT RF (in/mm)	GT RTJ (in/mm)	GT BWE (in/mm)	D2 (in/mm)	Weight (lb/kg)
2"x1.5" / 50x40	1.94 / 49	1.5 / 38	11.5 / 292	11.63 / 295	11.5 / 292	6.5 / 166	77 / 35
3"x2" / 80x50	2.94 / 74	1.94 / 49	14 / 356	14.13 / 359	14 / 356	8.3 / 211	154 / 70
4"x3" / 100x80	3.94 / 100	2.94 / 74	17 / 432	17.13 / 435	17 / 432	10.9 / 276	309 / 140
6"x4" / 150x100	5.94 / 150	3.94 / 100	22 / 559	22.13 / 562	22 / 559	14 / 356	584 / 265
8"x6" / 200x150	7.94 / 201	5.94 / 150	26 / 660	26.13 / 664	26 / 660	16.6 / 421	750 / 340

* Weight and dimensions for larger valve sizes up to 64" available on request.

Frequently Asked Questions

What is the advantage of the Double Block and Bleed (DBB) system?

The DBB system ensures bidirectional zero leakage by providing two seating surfaces that, when in the closed position, provide a seal against pressure from both ends of the valve with a means of vending/bleeding the cavity between the seating surfaces.

How does the top-entry design benefit maintenance?

The top-entry design allows for internal parts to be inspected and replaced without removing the valve body from the pipeline, significantly reducing downtime and maintenance labor.

What makes the Scotch yoke actuator more efficient?

The Scotch yoke design provides high torque at the start and end of the stroke (breakout and reseat), which matches the torque requirements of ball valves, ensuring smooth and reliable automation.

Can this valve handle abrasive media?

Yes, the metal-seated and fixed ball design is specifically engineered to withstand high-pressure, high-temperature, and abrasive conditions common in oil, gas, and chemical processing.

What is the torque reduction compared to floating ball valves?

The fixed trunnion-mounted ball design uses bearings to support the ball, which reduces the operating torque by approximately 40% compared to traditional floating ball valves.

Are larger sizes available beyond 8 inches?

Yes, while standard tables show up to 8", weight and dimensions for larger valve sizes up to 64" can be provided upon request for specific project requirements.

Product Detail

China Class 600 Scotch Yoke Fixed Trunnion-Mounted Ball Valve with DBB Structure Supplier, Factories

Product Description