Needle Valves Series : NV101


DAWSONS-TECH most cost effective Needle Valves Series : NV101 is having compact and rugged Bar Stock Square Body designed and manufactured for a variety of applications including Instrumentation, Hydraulic and Pneumatic systems.
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 1" Tube OD.
    • Metric : 6mm to 16mm 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.

Temperature Pressure
PSIG Bar
-54oC to 38oC 6000 408
-54oC to 93oC 5160 351
-54oC to 148oC 4660 317
-54oC to 204oC 4280 291
-54oC to 232oC 4130 289
Type Test Approvals :
The design of DAWSONS-TECH Needle Valves Series : NV101 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 1000 PSIG (69 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 Description Material
    1 Handle SS316
    2 Screw SS316
    3 Valve Stem SS316
    4 Dust Cap PVC
    5 Packing Adjustment Bonnet SS316
    6 Lock Nut SS316
    7 Bonnet SS316
    8 Washer SS316
    9 Packing PTFE
    10 Safety Pin SS316
    11 Valve Body SS316

    End Connection Orifice Cv Dimensions In mm Dawsons-Tech Part No.
    Type Size - A B C D E F A/F
    Tube OD to Tube OD (Fractional) 1/4" 4.3 0.37 62.0 31.0 31.0 80.0 54.0 28.57 NV101-TT4
    3/8” 4.3 0.37 73.0 36.5 36.5 80.0 54.0 28.57 NV101-TT6
    1/2" 6.3 0.73 77.8 38.9 38.9 84.0 58.0 31.75 NV101-TT8
    3/4" 9.5 1.80 100.0 50.0 50.0 87.0 63.0 31.75 NV101-TT12
    Tube OD to Tube OD (Metric) 6mm 4.3 0.37 62.0 31.0 31.0 80.0 54.0 28.57 NV101-TT4M
    8mm 4.3 0.37 62.0 31.0 31.0 80.0 54.0 28.57 NV101-TT6M
    10mm 6.3 0.73 73.0 36.5 36.5 80.0 54.0 31.75 NV101-TT8M
    12mm 6.3 0.73 77.8 38.9 38.9 84.0 54.0 31.75 NV101-TT12M
    Female to Female NPT 1/4" 4.3 0.37 57.2 28.6 28.6 80.0 54.0 28.57 NV101-FF4N
    3/8” 4.3 0.37 60.4 30.2 30.2 80.0 54.0 28.57 NV101-FF6N
    1/2" 6.3 0.73 79.4 39.7 39.7 84.0 58.0 31.75 NV101-FF8N
    3/4" 9.5 1.80 79.4 39.7 39.7 87.0 63.0 34.92 NV101-FF12N
    1” 9.5 1.80 92.0 46.0 46.0 98.0 68.0 44.40 NV101-FF16N
    Male to Female NPT 1/4" 4.3 0.37 57.2 28.6 28.6 80.0 54.0 28.57 NV101-MF4N
    3/8” 4.3 0.37 60.4 30.2 30.2 80.0 54.0 28.57 NV101-MF6N
    1/2" 6.3 0.73 79.4 39.7 39.7 84.0 58.0 31.75 NV101-MF8N
    3/4" 9.5 1.80 79.4 39.7 39.7 89.0 63.0 34.40 NV101-MF12N
    1” 9.5 1.80 92.0 46.0 46.0 98.0 68.0 44.40 NV101-MF16N
    Female to Female BSP 1/4" 4.3 0.37 57.2 28.6 28.6 80.0 54.0 28.57 NV101-FF4RG
    3/8” 4.3 0.37 60.4 30.2 30.2 80.0 54.0 28.57 NV101-FF6RG
    1/2" 6.3 0.73 79.4 39.7 39.7 84.0 58.0 31.75 NV101-FF8RG
    3/4" 9.5 1.80 79.4 39.7 39.7 89.0 63.0 34.40 NV101-FF12RG
    1” 9.5 1.80 92.0 46.0 46.0 98.0 68.0 44.40 NV101-FF16RG
    Socket Weld to Socket Weld 1/4" 4.3 0.37 46.0 23.0 23.0 80.0 54.0 28.57 NV101-SW4
    3/8” 4.3 0.37 57.2 28.6 28.6 80.0 54.0 28.57 NV101-SW6
    1/2" 6.3 0.73 57.2 28.6 28.6 80.0 54.0 28.57 NV101-SW8
    3/4" 6.3 0.73 79.4 39.7 39.7 84.0 58.0 31.75 NV101-SW12
      Dimensions are for reference only and are subject to change.