DAWSONS-TECH most cost effective Needle Valve Series : NV107A (Angle Pattern) is designed very carefully with Live Loaded PTFE Packing to provide repeated leak tight seal between Stem and Bonnet of the Valve and also compensate for wear & Pressure / Temperature fluctuations during its operations.
Features / Benefits :
- Compact and rugged design.
- Bar Stock Body in straight and angle pattern.
- Low operating torque.
- Anti blow-out stem.
- Flow coefficient (Cv) from 0.25 to 0.73.
- Orifice Size : 4.3mm and 6.3mm.
- Available in material SS316, all wetted parts in accordance with NACE MR01-75.
- Available with Male, Female NPT, BSP, BSPT Pipe Thread, Socket Weld and Tube O.D. end connections.
- Available with self centering non-rotating stem tip.
- Every Valve is Factory tested.
Product Range & Operating Parameters :
- Pressure Rating :
- UPTO 6000 PSIG (408 Bar at CWP).
- Pressure UPTO 10,000 PSIG (680 Bar) are available on request.
- Temperature Rating :
- : -54° C to 232° C with PTFE Packing.
- : -96° C to 426° C with Graphite Packing.
Applications :
- General Plant Services
- Hydraulic & Pneumatic
- Instrumentation Isolation,
- Pressure Measurement Devices
- Venting
Material of Constructions :
| Sr. No. | Part Description | Material |
| 1 | Handle | SS316 |
| 2 | Screw | SS316 |
| 3 | Valve Stem | SS316 |
| 4 | Lock Nut | SS316 |
| 5 | Belleville Washer | Stainless Steel |
| 6 | Upper Gland | SS316 |
| 7 | Packing | PTFE / Graphite |
| 8 | Lower Gland | SS316 |
| 9 | Panel Nut | SS316 |
| 10 | Valve Body | SS316 |
Technical Data :
The temperature and pressure rating for a standard Valve with PTFE packing.
| Temperature | Pressure | |
| PSIG | Bar | |
| -54OC to 38OC | 6000 | 413 |
| -54OC to 93OC | 5160 | 351 |
| -54OC to 148OC | 4660 | 317 |
| -54OC to 204OC | 4280 | 291 |
| -54OC to 232OC | 4130 | 289 |
Testing :
- Standard Test : Each Valve is pressure tested with Nitrogen at 2000 PSIG (138 Bar) for leakage at the seat and packing.
- Optional Hydrostatic Test : This test is performed with De-ionized water at 1.5 times the working pressure.
Certification :
The certificate to 3.1 acc. to EN10204 for Valves Body Material and pressure test will be provided on request.Standard Configuration Dimensions :
| End Connection | Flow Data | Dimensions in mm | Dawsons-TechPart No. | |||||
| Type | Size - A | Orifice(mm) | Cv | B | E | F | A/F | |
| Tube OD to Tube OD | 1/4" | 4.3 | 0.37 | 29.5 | 43.0 | 54.0 | 22.20 | NV107A-TT4 |
| Female to Female NPT | 1/4" | 4.3 | 0.37 | 25.4 | 43.0 | 54.0 | 22.20 | NV107A-FF4N |
| 1/2" | 6.3 | 0.73 | 35.8 | 59.5 | 58.0 | 31.75 | NV107A-FF8N | |
| Male to Female NPT | 1/4" | 4.3 | 0.37 | 25.4 | 43.0 | 54.0 | 22.20 | NV107A-MF4N |
| 3/8” | 4.3 | 0.37 | 35.8 | 59.5 | 54.0 | 28.57 | NV107A-MF6N | |
| 1/2" | 6.3 | 0.73 | 35.8 | 59.5 | 58.0 | 31.75 | NV107A-MF8N | |
| Male NPT to Tube OD | 1/4" | 4.3 | 0.37 | 28.7 | 43.0 | 54.0 | 22.20 | NV107A-M4N-T4 |