DAWSONS-TECH Ball Valve Series : VB71 Three piece bi-directional flow Ball Valves offer high pressure rating up to 10,000 PSIG (690 Bar). The Live-Loaded PEEK Seat ensure 100% bubble tight shut off and continuous repeatable performance and also compensate for wear and pressure / temperature charges. This Ball Valves are for most demanding applications in Hydraulic and Process Control Industries.
Features / Benefit :
- Available in Material SS316
- Material Traceable to certified material test report
- Three piece body design.
- Low torque operation, Bi-directional Flow
- Line Loaded PEEK Seat ensure bubble tight sealing and compensate for wear and Pressure / Temperature changes.
- Floating Ball design
- Quarter turn positive stop handle.
- Every Valve is pressure tested.






Operating Parameters :
- Pressure Rating : UPTO 10,000 PSIG (690 BAR) at CWP with PTFE packing, PEEK Seat and Fluorocarbon ‘O’ Ring
- Temperature Rating : -54o C to 180o C (depending on ‘O’ Ring material)
- End Connections - Inch : 1/4” to 1” Tube OD
- Metric : 6mm to 25mm Tube OD
- Pipe Threads: 1/4” to 1” Male / Female BSP / BSPT / NPT
Applications :
- Hydraulic
- Gas
- Instrument Air Lines
- High Pressure Instrument Lines
- General Plant Service
Type Test Approvals :
The design of DAWSONS-TECH Ball Valves Series : VB81 have been tested to Hydrostatic Proof & Burst Test in accordance to MSS SP-99-2016a Clause 5.5 & 5.6.Testing :
Certification :
The Certificate to 3.1 acc. to EN10204 for Valves body material and pressure test will be provided on request.Material of Constructions :



1 | Handle with PVC Grip | SS316 |
2 | Locking Dome Nut | SS316 |
3 | Lock Nut | SS316 |
4 | Anti-blowout stem | SS316 |
5 | Spring Washer | SS316 |
6 | Thrust Washer | SS316 |
7 | Thrust Ring | PEEK |
8 | Backup Ring | PTFE |
9 | ‘O’ Ring | VITON |
10 | Thrust Ring | PEEK |
11 | End Connector | SS316 |
12 | ‘O’ Ring | VITON |
13 | DISC Spring | STAINLESS STEEL |
14 | Body | SS316 |
15 | Ball | SS316 |
16 | Ball Seat | PEEK |
17 | ‘O’ Ring | VITON |
18 | Backup Ring | PTFE |
19 | Seat supporter | SS316 |
Standard Configuration Dimensions :



End Connection | Flow Data | Dimensions in mm | Dawsons-Tech Part No. | |||||||
Type | Size - A | Orifice (mm) | Cv | B | C | D | E | A/F-1 | A/F-2 | |
Female NPT | 1/4" | 6.4 | 2.34 | 41.0 | 41.0 | 42.0 | 87.0 | 28.57 | 22.20 | VB71-FF4N |
3/8” | 8.3 | 4.30 | 43.0 | 43.0 | 46.0 | 101.0 | 31.75 | 25.40 | VB71-FF6N | |
1/2" | 10.3 | 6.42 | 51.5 | 51.5 | 48.0 | 101.0 | 34.93 | 27.00 | VB71-FF8N | |
3/4" | 12.2 | 12.45 | 54.5 | 54.5 | 50.0 | 101.0 | 38.10 | 31.75 | VB71-FF12N | |
1” | 15.0 | 17.35 | 61.8 | 61.8 | 53.0 | 101.0 | 44.40 | 41.27 | VB71-FF16N | |
Male NPT | 1/4" | 4.8 | 1.20 | 43.3 | 43.3 | 42.0 | 87.0 | 28.57 | 22.20 | VB71-MM4N |
3/8” | 6.4 | 2.34 | 45.4 | 45.4 | 46.0 | 101.0 | 31.75 | 25.40 | VB71-MM6N | |
1/2" | 10.3 | 6.42 | 53.2 | 53.2 | 48.0 | 101.0 | 34.93 | 27.00 | VB71-MM8N | |
3/4" | 10.3 | 6.42 | 55.5 | 55.5 | 50.0 | 101.0 | 38.10 | 31.75 | VB71-MM12N | |
1” | 15.0 | 17.35 | 65.8 | 65.8 | 53.0 | 101.0 | 44.40 | 41.27 | VB71-MM16N | |
Female BSP | 1/4" | 6.4 | 2.34 | 41.0 | 41.0 | 42.0 | 87.0 | 28.57 | 22.20 | VB71-FF4RG |
3/8” | 8.3 | 4.30 | 43.0 | 43.0 | 46.0 | 101.0 | 31.75 | 25.40 | VB71-FF6RG | |
1/2" | 10.3 | 6.42 | 51.5 | 51.5 | 48.0 | 101.0 | 34.93 | 27.00 | VB71-FF8RG | |
3/4" | 12.2 | 12.45 | 54.5 | 54.5 | 50.0 | 101.0 | 38.10 | 31.75 | VB71-FF12RG | |
1” | 15.0 | 17.35 | 61.8 | 61.8 | 53.0 | 101.0 | 44.40 | 41.27 | VB71-FF16RG | |
Fractional Tube Fitting | 1/4" | 4.8 | 1.20 | 45.8 | 45.8 | 42.0 | 87.0 | 28.57 | 22.20 | VB71-TT4 |
3/8” | 6.4 | 2.34 | 50.5 | 50.5 | 46.0 | 101.0 | 31.75 | 25.40 | VB71-TT6 | |
1/2" | 10.3 | 6.42 | 57.0 | 57.0 | 48.0 | 101.0 | 34.93 | 27.00 | VB71-TT8 | |
3/4" | 12.2 | 12.45 | 61.3 | 61.3 | 50.0 | 101.0 | 38.10 | 31.75 | VB71-TT12 | |
1” | 15.0 | 17.35 | 70.5 | 70.5 | 53.0 | 101.0 | 44.40 | 41.27 | VB71-TT16 | |
Metric Tube Fitting | 6mm | 4.2 | 0.93 | 45.8 | 45.8 | 42.0 | 87.0 | 28.57 | 22.20 | VB71-TT6M |
8mm | 6.4 | 2.34 | 46.5 | 46.5 | 42.0 | 101.0 | 28.57 | 22.20 | VB71-TT8M | |
10mm | 6.4 | 2.34 | 50.5 | 50.5 | 46.0 | 101.0 | 31.75 | 25.40 | VB71-TT10M | |
12mm | 9.5 | 5.57 | 57.0 | 57.0 | 48.0 | 101.0 | 34.93 | 27.00 | VB71-TT12M | |
16mm | 10.3 | 6.42 | 60.0 | 60.0 | 50.0 | 101.0 | 38.10 | 31.75 | VB71-TT16M | |
25mm | 15.0 | 17.35 | 70.5 | 70.5 | 53.0 | 101.0 | 44.40 | 41.27 | VB71-TT25M |