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DBB Double Block Double Drain Double Ball RTJ High Pressure Flanged Ball Valve

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The CHINA J-VALVES DBB Double Block Double Drain Double Ball RTJ High Pressure Flanged Ball Valve is a high-performance double block and bleed ball valve, specifically designed for high-pressure industrial applications requiring high reliability and precise control. This valve features a double-ball design, enabling dual isolation and bleeding functions to ensure safe isolation of pipeline systems during maintenance or overhaul. Its Ring Joint (RTJ) flange design guarantees reliable installation and sealing performance, making it suitable for high-pressure environments in industries such as petroleum, natural gas, and chemical engineering.
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DBB Double Block Double Drain Double Ball RTJ High Pressure Flanged Ball Valve

Structural Features

  • Double Ball Design: Utilizes two independent balls and two valve seats to achieve dual isolation, ensuring no medium leakage during maintenance or overhaul.

  • Dual Bleeding Function: Equipped with two bleeding ports, which can safely drain residual medium in the pipeline after isolation, preventing medium accumulation and pressure buildup.

  • Ring Joint Flange: Adopts RTJ (Ring Joint) flange connection, conforming to ASME B16.5 standards, ensuring reliable installation and sealing performance.

  • High-Pressure Design: Capable of withstanding pressure ratings up to ANSI Class 600 to Class 2500, suitable for high-pressure environments.

  • Fire Safety Design: Complies with API 607 standards, ensuring the valve maintains sealing performance even in case of fire to prevent medium leakage.

  • Anti-Static Device: Built-in anti-static device effectively prevents static accumulation, reducing the risk of fire and explosion.

  • Stem Blowout Prevention Design: The stem is designed with blowout prevention to ensure operational safety.

  • Compact Design: Small in size and light in weight, facilitating installation and integration into existing systems.

Technical Parameters

  • Size Range: 1/2″ to 8″ (DN15 to DN200)

  • Pressure Class: Class 150 to Class 1500 (PN20 to PN260)

  • Temperature Range: -46℃ to +240℃

  • Materials:

    • Valve Body: A105, A182 F304, F316, F304L, F316L

    • Ball: A182 F304, F316, F304L, F316L

    • Stem: A182 F304, F316

    • Sealing Material: PTFE, PEEK, NYLON, flexible graphite

  • Connection Method: Flange connection (RTJ)

  • Operation Modes: Manual, pneumatic, electric

  • Design Standards: API 6D, ASME B16.34

  • Testing Standards: API 598

  • Face-to-Face Dimensions: Compliant with ASME B16.10 standards

Application Fields

  • Oil and Gas Industry: Used in exploration, gathering, and processing systems of oil and gas fields to ensure reliable isolation and control of media.

  • Chemical Industry: Suitable for transportation and reaction systems of various chemical media, preventing medium leakage and ensuring production safety.

  • Pharmaceutical Industry: Applied in pipeline systems during pharmaceutical production to ensure medium isolation and cleanliness in the drug manufacturing process.

  • Food and Beverage Industry: Meets food-grade requirements, used in pipeline systems for food and beverage production to ensure hygiene and safety.

  • HVAC: Used in cooling water systems, hot water systems, etc., to ensure efficient operation of the system.

  • General Industrial Applications: Suitable for control and isolation of media such as water, oil, and gas.

Advantages and Value

  • High Reliability: The double-ball design and high-pressure design ensure stable operation of the valve in high-pressure environments, reducing maintenance frequency and downtime.

  • High Safety: Fire-resistant and anti-static designs, along with reliable sealing performance, effectively reduce leakage risks and ensure the safety of personnel and equipment.

  • Easy Installation and Maintenance: The flange connection simplifies the installation process and facilitates maintenance and overhaul.

  • Wide Application Range: Multiple material options and a broad range of pressure and temperature make it adaptable to various complex working conditions and medium characteristics.

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