DBB Ball Valve
DBB ball valve
DBB ball valve are designed in order to replace the multiple valves connection complex forms in traditional pipeline. Reduce the leakage in system to achieve quickly bleed, close function.
DBB ball valve maximum save installation space and simplified installation program. Cut down the pressure in piping system. Convenient instrument cleaning maintenance and reduce the costs.
The valves are widely used in electric power, petroleum chemical industry, metallurgy, marine, oil, natural gas, coal gas, pharmaceutical and other industries hydraulic system pipeline.
Product information
| NO | Part Name | ASTM Material | ||||
|---|---|---|---|---|---|---|
| Carbon steel Alloy Steel Stainless Steel | ||||||
| 1 | Bonnet | ASTM A105 | A352-LCB | A217+WC6 | A351-CF8 | A351-CF8M |
| 2 | Spring | INCONEL750 | A313-304 | A313-316 | A313-316 | A313-316 |
| 3 | Seat O ring | Viton | Viton1) | Viton | Viton1) | Viton |
| 4 | Seat | ASTM A105+ENP | A305-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 | F4 | |||
| 9 | Greease injection valve | SS | 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-WC6 | A351-CF8 | A351-CF8M |
| 14 | Trunnion | A276-304 | A276-316 | A276-304 | A276-316 | |
| 15 | Lower cover | ASTM A105 | A352-LCB | A217-WC6 | A351-CF8 | A351-CF8M |
* Note: The dimension of connecting flange can be design according to customer’s requirements.
1. Double sealing o-ring to prevent the leakage at the stem.
2. Blow-out proof stem, it is internally inserted the body and function as the up-sealing seat.
3. Equipped with preloaded spring floating seat ring to be ensured seal even in low pressure.
4. Blow-out proof stem, it is internally inserted the body and function as the up-sealing seat.
5. Adopt double ball valve is to reduce the leakage in the system and to achieve quick-safely bleeding.
6. Equipped with preloaded spring floating seat ring to be ensured seal even in low pressure.
DBB Ball valve is made of two balls and two seats and one needle valve, bottom of body have drain valve.
Using Forging material , one piece, two piece, three piece structure.Both side is flange ends, one side is sw ends one side is flange ends. both side is RTJ ends.Can sampling, save install time and purchase cost .not easy to leaking .
Applicable standards
Bore: 2″ ~ 24″(50 ~ 600mm)
Pressure: 150LB ~ 2500LB(1.6MPa ~ 32MPa)
Design standard: API6D, ASME B16.34, ASME Ⅶ
Face to face: ASME B16.10, API 6D
End Flanges: ASME B16.5
Butt-welding: ASME B16.25
Material: NACE MR0175
Steel valves: ASME B16.34
Inspection and test: API 598, API 6D, ASME B16.34
Fire Test: API 6Fa, API 607
Designing features
Full bore design
Bolt Bonnet Split body
Blow out protection stem design
Zero-leakage
Three Piece body
Trunnion Mounted ball type
Double-block and bleed function
Single piston design
Seat is available with double piston design
Blow out proof stem
Fire safe construction
Anti-static device
Stopper device
Flanged or butt welding ends
Optional cryogenic application
Optional soft or hard sealing design
Available with lever
Temperature:-29+545°C
Service:Water,Oil,Gas