Description
DBB (Double Block and Bleed) valves are a space-saving dual isolation solution that reduces the need for costly multi-valve systems. By combining all block and bleed components into a single unit, DBB valves are compact in structure, light in weight and good in sealing performance. DBB valves in KERUI have three different types, that is, flange type, welded type and threaded type. We can customize these valves according to your specifications.
Application
DBB threaded ball valve can be widely used in such pipelines as tap water, sewage, construction, petroleum, chemical, food, medicine, textile, electric power, shipbuilding, metallurgy, energy systems, etc.
Advantages
1. DBB threaded ball valve features excellent sealing performance, low friction between sealing surfaces and long service life.
2. The body of this DBB valve is cast in precision. Thus it is good in performance. The surface is finished twice, thus it is smooth and bright. The bonnet is processed by numerical control machine.
3. KERUI has been awarded by ISO9001:2008 international system certification, API 6D certification, CE certification, etc.
Performance
1. Sealing materials can be chosen based on media involved to strengthen sealing performance and wear resistance, reducing cost.
2. Our DBB threaded ball valves are guaranteed within 18 months and enjoy lifelong technical service.
Components
DBB threaded ball valve is mainly composed of valve body, bonnet, ball, valve stem, valve seat, sealing materials, etc.
|
No.
|
Part Name
|
ASTM Material
|
|
Carbon Steel
|
Alloy Steel
|
Stainless Steel
|
|
1
|
Bonnet
|
ASME A105
|
A352-LCB
|
A217+WCB
|
A351-CF8
|
A351-CF8M
|
|
2
|
Spring
|
INCLONEL750
|
A313-304
|
A313-316
|
A313-316
|
A313-316
|
|
3
|
Seat O Ring
|
Viton
|
Viton
|
Viton
|
Viton
|
Viton
|
|
4
|
Seat
|
ASME A105+ENP
|
A350-LF2 +ENP
|
A182+F316
|
A182-F304
|
A182-F316
|
|
5
|
Seat Ring
|
PTFE
|
PTFE
|
R.PTFE
|
Glass Filled PTFE
|
|
6
|
Stud
|
A193-B7
|
A320-L7
|
A193-B7
|
A193-B8
|
A193-B8
|
|
7
|
Connection Plate
|
ASTM A105
|
A352-LCB
|
A217-WC6
|
A351-CF8
|
A351-CF8
|
|
8
|
Packing Case
|
F4
|
|
9
|
Grease Injection Valve
|
SS
|
|
10
|
Stem O Ring
|
Viton
|
Viton
|
Viton
|
Viton
|
Viton
|
|
11
|
Stem
|
A182 F6a
|
A276-304
|
A276-316
|
A276-304
|
A276-316
|
|
12
|
Ball
|
ASTM A105+ENP
|
A182-F304
|
A182-F316
|
A182-F304
|
A182-F316
|
|
13
|
Body
|
ASTM A105
|
A352-LCB
|
A217-WCB
|
A351-CFB
|
A351-CF8M
|
|
14
|
Trunnion
|
A276-304
|
A276-316
|
A276-304
|
A276-316
|
|
15
|
Lower Cover
|
ASTMA105
|
A352-LCB
|
A217-WCB
|
A351-CFB
|
A351-CF8M
|
Structure of DBB Threaded Ball Valve
Standards of DBB Threaded Ball Valve
Pressure Rating: ASTM B16.5
Flange End: ASME B16.5
Temperature: -53~1000℉(10~537℃)
Full Port: 3/8~ 2in- (9.5MM~50.8MM)
Parts and Functions
1. Whole valve structure: no leakage
2. Independent handle (nut): fix stem without handle
3. Ball valve
4. Stainless handle and cover: strengthen corrosion-resistance performance
5. Bleeder valve
6. Ball valve
7. Load and elastic seat: guarantee sealing performance in high/low temperature or low voltage condition
8. O-ring: guarantee sealing performance in various condition
9. Flange sealing surface has smooth and sawtooth types.
Dimensions of DBB Threaded Ball Valve
