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Double Block and Bleed Ball Valves

Double Block and Bleed (DBB) Ball Valves Manufacturer

Double Block and Bleed Ball Valves, Abbr DBB Ball valves are ball valves with dual safety isolation and medium discharge functions. Their core design features a double-seat shut-off structure and a middle cavity bleed interface, making them widely used in industrial scenarios with extremely high requirements for tightness and safety.

Core Functions

  1. Double-seat Shut-off: Through two independent sealing seats, it simultaneously blocks the fluid in the upstream and downstream pipelines, forming a dual isolation to prevent bidirectional leakage of the medium.
  2. Middle Cavity Bleeding: The DBB ball valves body is equipped with a pressure relief interface, which can safely discharge residual media in the shut-off state, avoiding pressure accumulation in the pipeline and ensuring operational safety.
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Industrial double block and bleed valve in yellow, designed for isolation and maintenance operations, featuring dual sealing mechanisms and bleed functionality.
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Double Block and Bleed Ball Valves DBB

DBB Ball Valves: Industrial Safety & Operational Efficiency

Double Block and Bleed (DBB) ball valves are critical components in various industrial applications, designed to ensure safety and operational efficiency. Featuring two sealing seats for reliable shut-off from both ends and an additional bleed valve to release pressure or test for leaks between seats, DBB valves are essential in systems requiring isolation and pressure relief, such as oil & gas, chemical, and petrochemical industries. They help enhance safety protocols, minimize downtime, and optimize maintenance processes.

Double Block and Bleed (DBB) Ball Valves

Double Block and Bleed (DBB) Ball Valves are  ball valves designed with dual safety isolation and media discharge capabilities. Featuring a double-seat shut-off structure and a middle cavity bleed port, they are widely used in industrial scenarios with extreme requirements for sealing and safety.

Core Functions

  • Dual Seat Shut-Off: Two independent sealing seats simultaneously block upstream and downstream fluid flow, creating dual isolation to prevent bidirectional media leakage.
  • Middle Cavity Bleeding: A built-in pressure relief port allows safe discharge of residual media when the valve is closed, avoiding pressure accumulation in pipelines and ensuring operational safety.

Key Advantages

  • Enhanced Safety: Dual shut-off and bleed design significantly reduces risks of media leakage and abnormal pressure.
  • Easy Operation: Quick opening/closing via the ball valve structure, with the bleed port supporting online pressure monitoring or media discharge.
  • Wide Applicability: Suitable for high-pressure, high-temperature, corrosive, or high-purity media, meeting diverse industrial needs.

 

With precise structural design, DBB ball valves serve as critical components for “safety isolation + reliable bleeding” in industrial pipeline systems, especially in scenarios involving hazardous media or high-risk operations, ensuring production safety and efficiency.

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Double Block and Bleed Ball Valves Parts

Why Choose Us

Ensure Safety

Our products and services comply with international standards and specifications to make sure that we only produce the best and highest quality products and services to our clients.

Customization Service

We offer tailor-made industrial valves to ensure that our product fits your application standards and demand. TIANYU is ISO, API, MSS, and ASME compliant to guarantee you the highest product quality.

Fast Shipping

As a business partner, TIANYU makes sure that we commit to our clients’ requested deadline because we very much understand the importance of adhering to the timeline required.

After-Sales Service

TIANYU’s service does not end once our industrial ball valves are being delivered. Also, we offer warranties and provide customer service to our clients as part of our quality service.

About Us
valve test apparatus

Founded in 2009, Wenzhou Tianyu Valve Technology Co., Ltd. is a professional valve enterprise integrating design, development, production, and sales services, located in the hometown of Chinese valves – Oubei Town, Wenzhou.

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