Ball Valve
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Built for critical isolation applications where safety, reliability, and controlled pressure relief are essential, the DBB Ball Valve (Double Block and Bleed) is designed to provide two independent sealing barriers and a controlled bleed function within a single valve. This configuration enables effective isolation of the upstream and downstream process media while allowing the valve cavity to be safely depressurized, helping to improve operational safety and facilitate inspection and maintenance.
The DBB Ball Valve is well suited for applications in oil & gas, natural gas transmission, petrochemical, refinery, chemical processing, and power generation industries. Its robust construction, reliable sealing performance, and integrated double isolation and bleed function make it an ideal choice for critical pipeline and process systems where leakage prevention, safe maintenance, and reduced equipment footprint are essential.
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Product description: |
Side -Entry Trunnion Mounted Ball Valve |
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Model: |
DBB Ball Valve |
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Nominal diameter: |
NPS 2”～56” |
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Operating temperature: |
-46℃～121℃ |
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Operating pressure: |
CLASS 150～CLASS 2500 |
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Material: |
WCB、A105、LCB、LF2、CF8、F304、CF8M、F316, etc. |
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Design standard: |
API 6D、ISO 17292 |
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Structural length: |
ASME B16.10 |
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Connecting end: |
ASME B16.5、ASME B16.25 |
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Test standard: |
API 598、API 6D |
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Operation method: |
Handle, worm, motor-drive unit, pneumatic drive unit |
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Application fields: |
Water, petroleum and natural gas |
High-performance quarter-turn valve delivering bubble-tight shutoff for demanding process industries.
Double Block & Bleed Function
Provides two independent isolation barriers with a controlled bleed function for safe pressure relief from the valve cavity.
Enhanced Operational Safety
Enables safe isolation and verification of the process system, helping reduce the risk of accidental media release during maintenance.
Reliable Tight Shut-Off
Precision-engineered ball and seat sealing systems provide dependable isolation and minimize leakage in critical services.
Reduced Installation Footprint
Combines multiple isolation functions into a single valve assembly, helping reduce piping complexity, space requirements, and potential leakage points.
Cavity Pressure Relief
The bleed system allows trapped pressure within the valve cavity to be safely released, supporting safer inspection and maintenance.
High Pressure Capability
Robust pressure-containing components are designed to withstand demanding pipeline and process conditions.
Low Operating Torque
Optimized ball and seat design reduces friction and operating loads, enabling efficient manual or automated operation.
Fire Safe Design
Fire-safe sealing arrangements help maintain valve integrity and minimize leakage during emergency fire conditions when designed and tested to applicable standards.
Easy Maintenance & Inspection
Integrated bleed and isolation functions simplify pressure verification, inspection, and maintenance procedures.
Wide Range of Applications
Suitable for oil & gas pipelines, natural gas transmission, refineries, petrochemical plants, chemical processing, power generation, and other critical isolation applications.
Chemical Industry
Ball valves, butterfly valves, gate valves, globe valves, check valves, and control valves ensure safe fluid isolation, precise process control, and reliable operation in demanding chemical processing applications.
Oil Industry
Engineered for reliable isolation, flow regulation, and backflow prevention, our valve solutions support upstream, midstream, and downstream oil production and refining operations.
Natural Gas
Providing leak-tight sealing, dependable flow control, and safe pipeline operation for natural gas transmission, storage, LNG, and distribution systems.
Metallurgy
Built to withstand high temperatures, abrasive media, and harsh operating conditions in steelmaking, smelting, and metallurgical processing.
Power Generation
Ensuring reliable isolation, accurate flow control, and long-term performance in steam, boiler, turbine, and power plant systems.
Pharmaceutical
Delivering hygienic, precise, and contamination-free flow control for pharmaceutical manufacturing and clean process applications.
Steel Industry
Designed for high-temperature, high-pressure, and severe-service conditions in iron making, steelmaking, rolling mills, and auxiliary process systems.
New Energy
Supporting hydrogen, LNG, carbon capture, battery materials, and renewable energy projects with advanced valve solutions for safe and efficient process control.
-196°C Cryogenic Liquid Nitrogen Test System
Simulates ultra-low-temperature operating conditions to verify valve sealing performance and reliability for cryogenic applications.
Brinell, Rockwell & Vickers Hardness Tester
Ensures material hardness meets international standards for strength, durability, and long-term performance.
Large-Scale Coordinate Measuring Machine (CMM)
Provides high-precision dimensional inspection to ensure machining accuracy and product consistency.
Valve Life Cycle Testing System
Evaluates valve durability and operational reliability through repeated opening and closing cycle tests.
High & Low Temperature Test Chamber
Verifies valve performance and stability under extreme temperature conditions.
High Temperature Aging Test Chamber
Assesses long-term material stability and product reliability under continuous high-temperature exposure.
Desktop SPECTRO Optical Emission Spectrometer (Germany)
Performs rapid and accurate material composition analysis to ensure full material traceability and compliance.
Our engineering team evaluates these factors to ensure long-term reliability and regulatory compliance.
ISO9001:2015
ISO9001:2015
Environmental Management System Certification
Occupational Health & Safety Management System Certification
Certificate of Quality System Approval
ScheduleTo Certificate No HPiVS-iP1001-062-Q-10-00
CEPTUфNKAT COOTBETCTBNа
EAC
Certificate of Authority to use the Official APl Monogram
Certificate of Authority to use the Official APl Monogram
Certificate of Authority to use the Official APl Monogram
Certificate of Authority to use the Official APl Monogram
Certificate of Authority to use the Official APl Monogram
ISO 15848－1 QUALIFICATION CERTIFICATE
Test Report
A ball valve is designed for reliable on/off isolation by rotating a ball with a bore through 90 degrees. It is widely used in oil & gas, chemical processing, LNG, water treatment, and industrial pipeline systems requiring tight shutoff.
Choose a ball valve when you need bubble-tight sealing, low operating torque, quick quarter-turn operation, and long service life. It is ideal for frequent operation and automated process systems.
Floating ball valves are suitable for small and medium sizes, while trunnion-mounted ball valves provide lower operating torque and greater stability for high-pressure and large-diameter applications.
Q Can ball valves be used for throttling?
Ball valves are primarily designed for on/off service. Although partial opening is possible, continuous throttling is generally not recommended because it may damage the sealing surfaces.
Q What materials are available for ball valves?
Ball valves are available in carbon steel, stainless steel, duplex stainless steel, alloy steel, and special materials to suit corrosive, high-temperature, cryogenic, and severe-service applications.
Q Which industries commonly use ball valves?
Ball valves are widely used in oil & gas, petrochemical, LNG, chemical processing, power generation, mining, and general industrial applications.
Hangzhou Kaiwei Valve Group Co, Ltd, established in 2015, is a cutting-edgeindustrial enterprise that specializes in the R&D, design, casting, production,and sales of fluid control products and services
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