DAWSONS-TECH offers most cost effective panel mountable Needle Valve Series : NV103 is having compact and rugged Bar Stock Body design and construction. This Valve is typically used in severe environments, sampling systems, high-pressure shut down systems and test stands.
Features / Benefits :
  • Low operating torque, Anti blow-out stem.
  • Stem threads are cold rolled for smooth operation.
  • Choice of optional stem to provide greater flexibility.
  • Choice of packing PTFE or Graphite.
  • Stem packing below the threads, protects the Stem threads from system media.
  • Orifice size : 4.3mm, 6.3mm and 9.5mm, Flow Coefficient (Cv) from 0.37 to 1.8.
  • Available in Material SS316, all wetted parts in accordance with NACE MR01-75.
  • Every Valve is pressure tested.
Product Range & Operating Parameters :
  • Pressure Rating : UPTO 6000 PSIG (413 Bar) at CWP.
  • Temperature Rating :
    • : -54° C to 232° C with PTFE Packing.
    • : -96° C to 426° C with Graphite Packing.
  • End Connections -
    • Fractional : 1/4" to 3/4" Tube OD.
    • Metric : 6mm to 12mm Tube OD.
    • Pipe Threads : 1/4" to 3/4" Male / Female NPT, BSPT, BSP & Socket Weld
Applications :
  • General Plant Services
  • Hydraulic & Pneumatic
  • Instrumentation Isolation,
  • Pressure Measurement Devices
Stem Type :
 DAWSONS-TECH Valves are available with choice of optional stem to provide greater flexibility.

Non-Rotating (NR)  : It is standard self-centering non-rotating stem tip typically used in high cycle application to extend the Valves life.
‘V’ Stem (VS)  : It is used for general purpose liquid and gases.
Soft Seat (SF) : A soft seat stem requires a lower sealing torque. It is replaceable and suitable for temperature UPTO 120o C.
Regulating Stem (RS)  : It is used where some degree of flow control required.
 
Technical Data :
 The temperature and pressure rating for a standard Valve with PTFE packing.

TemperaturePressure
PSIGBar
-54oC to 38oC6000413
-54oC to 93oC5160351
-54oC to 148oC4660317
-54oC to 204oC4280291
-54oC to 232oC4130289
Type Test Approvals :
 The design of DAWSONS-TECH Needle Valve Series : NV103 have been tested to Hydrostatic Proof & Burst Test in accordance to MSS SP-99-2016a Clause 5.5 & 5.6.

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.
    Material of Constructions :
    Sr. No.Part DescriptionMaterial
    1HandleSS316
    2ScrewSS316
    3Valve StemSS316
    4Dust CapPVC
    5Packing Adjustment ScrewSS316
    6Lock NutSS316
    7BonnetSS316
    8Panel NutSS316
    9WasherSS316
    10PackingPTFE / Graphite
    11Safety PinSS316
    12Valve BodySS316
    Standard Configuration Dimensions :
    End ConnectionFlow DataDimensions in mmDawsons-TechPart No.
    TypeSize - AOrifice(mm)CvBCDEFGA/F
    Tube OD to Tube OD(Fractional)1/4"4.30.3772.836.436.479.054.019.825.40NV103-TT4
    3/8”4.30.3772.836.436.479.054.019.825.40NV103-TT6
    1/2"6.30.7380.040.040.080.058.022.528.57NV103-TT8
    3/4"9.51.8085.442.742.784.063.022.531.75NV103-TT12
    Tube OD to Tube OD(Metric)6mm4.30.3772.836.436.479.054.019.825.40NV103-TT6M
    8mm4.30.3773.036.536.579.054.019.825.40NV103-TT8M
    10mm6.30.7373.236.636.680.054.022.528.57NV103-TT10M
    12mm6.30.7380.040.040.080.054.022.528.57NV103-TT12M
    Female to Female NPT1/4"4.30.3758.029.029.079.054.019.825.40NV103-FF4N
    3/8”4.30.3780.030.030.080.054.019.828.57NV103-FF6N
    1/2"6.30.7368.032.532.584.058.026.031.75NV103-FF8N
     3/4"9.51.8070.035.035.087.063.026.034.92NV103-FF12N
    Male to Female NPT1/4"4.30.3760.031.029.079.054.019.825.40NV103-MF4N
    3/8”4.30.3762.032.030.080.054.019.828.57NV103-MF6N
    1/2"6.30.7370.037.532.584.058.026.031.75NV103-MF8N
    3/4"9.51.8075.040.035.087.063.026.034.92NV103-MF12N
    Female to Female BSP1/4"4.30.3758.029.029.079.054.019.825.40NV103-FF4RG
    3/8”4.30.3760.030.030.080.054.019.828.57NV103-FF6RG
    1/2"6.30.7368.032.532.584.058.026.031.75NV103-FF8RG
    3/4"9.51.8070.035.035.087.063.026.034.92NV103-FF12RG
    Socket Weld to Socket Weld1/4"4.30.3758.029.029.079.054.019.825.40NV103-SW4
    3/8”4.30.3758.029.029.080.054.019.825.40NV103-SW6
    1/2"6.30.7365.032.532.584.054.026.028.57NV103-SW8
    3/4"6.30.7370.035.035.087.058.026.031.75NV103-SW12
     Dimensions are for reference only and are subject to change.
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