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DBB Flanged Type Forged Steel Floating Double Ball Valve

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The CHINA J-VALVES DBB Flanged Type Forged Steel Floating Double Ball Valve is a high-performance Forged steel ball valve, specifically designed for industrial applications that require dual isolation and discharge functions. This type of valve achieves safe isolation of the pipeline system and medium discharge during maintenance or repair by integrating two independent spheres and a discharge port. Its forged steel material and floating ball design ensure the valve's high strength and excellent sealing performance, and it is widely used in industries such as petroleum, natural gas, chemical engineering, and pharmaceuticals.

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Product Description

DBB Flanged Type Forged Steel Floating Double Ball Valve

Structural Features

Dual Isolation Function: The valve is internally designed with two independent sealing balls, enabling dual isolation to ensure no medium leakage during maintenance or overhaul.
Bleed Function: Equipped with one bleed port, which can safely discharge residual media in the pipeline after isolation, preventing media accumulation and pressure buildup.
Floating Ball Design: The ball can float freely under the pressure of the medium, fitting tightly with the valve seat to form an excellent sealing effect, and also has an automatic pressure relief function.
Fire Safety Design: Complies with API 607 standards. Even in case of fire, the valve can still maintain sealing performance to prevent safety accidents caused by medium leakage.
Anti-Static Device: Built-in anti-static device effectively prevents static accumulation, reducing the risk of fire and explosion.
Flange Connection: Multiple flange connection methods are available, conforming to ASME B16.5 standards, ensuring installation reliability and compatibility.
Compact Design: 3-piece structure reduces installation space and weight, while lowering installation costs.

Technical Parameters

Size Range: 1/2″ to 8″(DN15 to DN200)
Pressure Range: ASME Class 150 to Class 1500 (PN20 to PN260)
Temperature Range: -50℃ to 240℃
Material Options:

Valve body: A105, F304 (L), F316 (L), LF2, F11, F51, etc.
Ball: A105+ENP, F304 (L), F316 (L), F51, etc.
Valve seat: PTFE, PEEK, NYLON, etc.

Connection Methods: Flange connection (RF), threaded connection (NPT), butt-welded connection (BW), socket-welded connection (SW)
Operation Modes: Various actuators available, including manual, electric, and pneumatic
Design Standards: API 6D, API 608, ASME B16.34
Testing Standards: API 598

Application Fields

Oil and Gas Industry: Used in exploration, gathering, processing, and transportation systems of oil and gas fields to realize isolation, control, and discharge of oil and gas.
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.
Urban Gas Industry: Used in pressure regulating stations, gas storage stations, and gas transmission pipelines of urban gas networks to ensure safe supply and stable transportation of gas.

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