1. Double Block and Bleed Ball Valves, Which is the ideal equipment in cutting off medium, are widely used in hydraulic system pipeline of power, petrochemical , metallurgy , marine , petroleum , natural gas , coal gas , pharmaceutical and other industries.2. Double Block and Bleed Ball Valve is also called DBB ball valve , DBB ball valve is a new kind of valve, it has completely double balls to cut off medium, discharge pressure and loot , Designed for reducing weight and saving space, Simplified installation procedure ,Reduce pressure in a pipeline system, Convenient instrument cleaning and maintenance . it is not only sealing reliable, and also saving the cost of manufacturing.
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Dublok double block and bleed valve assemblies have three valves - primary isolation, secondary isolation and bleed - all integrated into a single block. If required the inlet or outlet end connection can incorporate a spring loaded in-line piston check valve. The end connectors are interchangeable and can be specified to suit exact requirements.
Our Ball valve double block and bleed assembly is very compact and is recommended for general services. The valve can incorporate Needle, Globe, Gate and Check valves into the design to suit particular duty specifications as required.
● ISO 5211 Mounting Pad: Facilitates actuator installation and enables automated operation.
● Double Block and Bleed Design: Provides excellent isolation to prevent leakage and pressure.
● High-Pressure Service: Designed specifically for high-voltage applications, providing durability and safety.
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 applications is it suitable for?
This valve is perfect for isolation and venting in pipelines, especially in critical systems where safety and leak prevention are paramount.
Q2:What are the pressure ratings?
It is available in ANSI ratings for high-pressure service, making it suitable for demanding industrial applications.
Our Double Block and Bleed DBB Ball Valve provide reliable sealing to prevent leakage under pressure and ensure safe and efficient operation. Through customizable configurations, we tailor valves to meet your specific system requirements and optimize performance for your unique needs. Our valves are made of high-quality materials, which are durable and have long-lasting reliability in critical high-pressure applications. Believe us, in demanding industrial environments, we can provide safe isolation, leak prevention, and efficient maintenance.
