DBB ball valves are designed for key industries such as oil, gas, petrochemical and chemical processing. Its three-piece structure is easy to maintain, and the installation and operation are flexible. The ball is installed through the shaft neck, which reduces the movement of the ball under pressure, ensuring reliable sealing and extending service life, especially suitable for high-pressure systems.
The valve is equipped with double block and vent (DBB) functionality, which provides enhanced isolation performance and safe discharge of trapped fluids during maintenance. The valve is available in both threaded and flange connections for different pipeline configurations.
● Anti-Static Design: Prevent the accumulation of static electricity to ensure the safe handling of flammable or volatile chemicals.
● Dual Block and Bleed (DBB) function: Provides two layers of isolation to enhance leak prevention and safety during maintenance.
● Flexible Connection Options: Can provide docking welding (BW) and socket welding (SW) connections, easy to integrate into a variety of systems.
NO | Part name | Material | |
| GB | ASTM | ||
| 1 | Valve body | WCB | A2116-WCB |
| 2 | Sealing ring | PTFE | PTFE |
| 3 | Sphere | 1C18Ni9Ti | SS304 |
| 4 | Nut | 35 | A194-2H |
| 5 | Stud | 35CrMoA | A193-B7 |
| 6 | The stone body | WCB | A216-WCB |
| 7 | Shim | Graphite + stainless steel | B12.10-304F/.G |
| 8 | Filler | PTFE | PTFE |
| 9 | Packing gland | WCB | A2116-WCB |
| 10 | Locating piece | 25 | A105 |
| 11 | Ring | 65Mn | AISI 1066 |
| 12 | Handle | K33 | A47-667 Gr.32510 |
| 13 | Valve stem | 1Cr33 | A276-410 |
| 14 | Screw | 35 | A193-B7 |
| Thrust washer | PTFE | PTFE | |
Main Dimensions
| Nominal diameter | 15 | 20 | 25 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 |
| d1 | 13 | 19 | 25 | 38 | 64 | 64 | 76 | 102 | 127 | 152 | 203 |
| L | 108 | 117 | 127 | 165 | 191 | 191 | 203 | 229 | 356 | 394 | 457 |
| H | 59 | 63 | 75 | 95 | 142 | 142 | 152 | 178 | 252 | 272 | 342 |
| W | 130 | 130 | 160 | 230 | 400 | 400 | 400 | 650 | 1050 | 1050 | 1410 |
| Wt(kg) | 2.5 | 3 | 5 | 7 | 15 | 19 | 19 | 33 | 58 | 93 | 160 |
| Primari Isonation | Secondary Isolation | Drain |
| Ball | Ball | Needle |
| Needle | Needle | Needle |
| Ball | Needle | Needle |
| Size: | 2" ~ 24"(DN50~DN400) | ||||||||
| Pressure: | ANSI Ratings 150# ~ 2500# (PN16~PN420) | ||||||||
| Structure: | 3 Pieces Body Design | ||||||||
| Connections: | RF RTJ BW Connections | ||||||||
| Body Material: | ASTM A105, A182 304, A182 316, A182 304L, A182 316L,A182 F6A,A182,F51,A182 F53,F22 Alloy | ||||||||
| Ball Material: | ASTM A105, A182 304, A182 316, A182 304L, A182 316L,A182 F6A,A182,F51,A182 F53,F22 Alloy | ||||||||
| Seats Material: | PTFE/ RTFE(≤120ºC) , NYLON (≤80ºC), PEEK/PPL (≤250ºC) | ||||||||
| Driving means: | Manual,worm gear.etc. | ||||||||
| Flow direction: | bidirectional | ||||||||
| Applicable medium: | Seawater,all kinds of harsh environment | ||||||||
Q1:What is a DBB Ball Valve?
It is a ball valve with a three-piece body design and a trunnion-mounted ball, ensuring reliable sealing and ease of maintenance.
Q2:Can the valve handle high-pressure applications?
Yes, the DBB Ball Valve is specifically designed to handle high-pressure environments while ensuring reliable performance.
Our DBB ball valve design emphasizes safety and performance, featuring advanced features such as anti-static design and dual-block venting (DBB) functionality. We understand that each application has unique requirements, so we offer customized solutions to meet your specific needs. If you require flexible installation options, including butt welding (BW) and socket welding (SW) connections, or seek fire safety certification in high-risk environments, we assure you that your system will operate safely and efficiently. Choose our reliable, high-performance valves, designed to meet the stringent requirements of your most critical applications.
