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Needle & Bleed Valve

Needle Valve (With Live Load System)

Series : NV107

DAWSONS-TECH® Needle Valve Series : NV107 design very carefully with live loaded PTFE/Graphite packing to provide repeted leak tight seal between Stem and Bonnet of the Valve and also compensate for wear and pressure / temprature fluctuations during its operations.

Features :

  • Compact and Rugged Design.
  • Orifice size : 4.3mm and 6.3mm.
  • Bar stock body in straight & angle pattern.
  • Available in Material SS316, all wetted parts in
  • Low operating torque. accordance with NACE MR01-75.
  • Anti blow-out stem.
  • Available with Male, Female NPT, BSP, BSPT Pipe Threads.
  • Flow Coefficient (Cv) from 0.25 to 0.73.
  • Available with self centering non-rotations stem tip.
  • Every Valve is pressure tested.

Technical Data :

The temperature and pressure rating for a standard Valve with PTFE packing.

TemperaturePressure
PSIGBar
-54°C to 38°C6000408
-54°C to 93°C5160351
-54°C to 148°C4660317
-54°C to 204°C4280291
-54OC to 232OC4130289

Material of Construction :

Sr. No.Part DescriptionMaterial
1HandleSS316
2ScrewSS316
3Valve StemSS316
4Packing NutSS316
5Belleville WasherStainless Steel
6Upper GlandSS316
7PackingPTFE / Graphite
8Lower GlandSS316
9Panel NutSS316
10BonnetSS316
11WasherSS316
12Safety PinSS316
13Valve BodySS316

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.
End Connection Flow Data Dimensions in mm Dawsons-Tech Part No.
Type Size – A Orifice Cv B C D E F G A/F
Tube OD to Tube OD (Fractional) 1/4″ 4.3 0.37 72.8 36.4 36.4 75.0 54.0 19.6 25.40 NV107-TT4
3/8” 4.3 0.37 72.8 36.4 36.4 75.0 54.0 19.6 25.40 NV107-TT6
1/2″ 6.3 0.73 80.0 40.0 40.0 79.0 58.0 19.6 28.57 NV107-TT8
Tube OD to Tube OD (Metric) 6mm 4.3 0.37 72.8 36.4 36.4 75.0 54.0 19.6 25.40 NV107-TT4M
8mm 4.3 0.37 73.0 36.5 36.5 75.0 54.0 19.6 25.40 NV107-TT6M
10mm 6.3 0.73 73.2 36.6 36.6 79.0 54.0 19.6 28.57 NV107-TT8M
12mm 6.3 0.73 80.0 40.0 40.0 79.0 54.0 19.6 28.57 NV107-TT12M
Female to Female NPT 1/4″ 4.3 0.37 58.0 20.0 29.0 75.0 54.0 19.6 25.40 NV107-FF4N
3/8” 4.3 0.37 60.0 30.0 30.0 79.0 54.0 19.6 28.57 NV107-FF6N
1/2″ 6.3 0.73 65.0 32.5 32.5 80.5 58.0 19.6 31.75 NV107-FF8N
Male to Female NPT 1/4″ 4.3 0.37 60.0 31.0 29.0 75.0 54.0 19.6 25.40 NV107-MF4N
3/8” 4.3 0.37 62.0 32.0 30.0 79.0 54.0 19.6 28.57 NV107-MF6N
1/2″ 6.3 0.73 70.0 37.5 32.5 80.5 58.0 19.6 31.75 NV107-MF8N
Female to Female BSP 1/4″ 4.3 0.37 58.0 29.0 29.0 75.0 54.0 19.6 25.40 NV107-FF4RG
3/8” 4.3 0.37 60.0 30.0 30.0 79.0 54.0 19.6 28.57 NV107-FF6RG
1/2″ 6.3 0.73 65.0 32.5 32.5 80.5 58.0 19.6 31.75 NV107-FF8RG
Socket Weld to Socket Weld 1/4″ 4.3 0.37 58.0 29.0 29.0 75.0 54.0 19.6 25.40 NV107-SW4
3/8” 4.3 0.37 58.0 29.0 29.0 75.0 54.0 19.6 25.40 NV107-SW6
1/2″ 6.3 0.73 65.0 32.5 32.5 79.0 54.0 19.6 28.57 NV107-SW8
3/4″ 6.3 0.73 70.0 35.0 35.0 80.5 58.0 19.6 31.75 NV107-SW12

Dimensions are for reference only and are subject to change.

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