Flow Control Valves
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Precision Needle Valve w/Non-rotary Needle MODEL 2412 SERIES Bellows Needle Valve (for rigid control of leaks) MODEL 2450 SERIES
Simplified Paramount Miniature Needle Valve MODEL 2400 SERIES Multidial Type Precision Needle Valve MODEL 2412M SERIES
Variable Secondary Pressure Flow Controller MODEL 2203 SERIES Variable Primary Pressure Flow Controller(Not subject to supply pressure variations) MODEL 2204 SERIES
All-Teflon Constant Flow Valve for Liquids/Chemicals MODEL 2600 SERIES Constant Flow Valve for Liquids MODEL 2600 SERIES
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Check to see which best fit your needs. If you have any questions, please call for assistance at 1-800-790-7837 or e-mail sales@netmotion.com
 Flow Control Valves
   
 
Bellows Needle Valve (for rigid control of leaks)
MODEL 2450 SERIES
 

This bellows seal type needle valve has been specifically developed so that it can satisfy the requirements for such areas in which leak is a concern of vital importance. Model 2450 Bellows Needle Valve has a construction to drastically prevent fluid leaks. In addition,it is outstanding in heat resistance and corrosion resistance,so the customer can use it with peace of mind not only in such adverse conditions where high vacuum,high pressure,high temperature or extremely low tempreature is present but also for corrosive,toxic or costly fluids.

 
Features
  • Stringent leak test(2×10-8Pam3/sec)
    100% leak test is conducted before shipping,using a helium leak detector.
  • Use of a precision needle
    The incorporated non-rotary type needle provides precise,smooth control of minute flows.
  • Compatible with both gases and liquids
  • Superior temperature characteristic
    Flows are scarcely affected by ambient temperature fluctuations,remaining within an insignificant range of flow variations.
    This superior temperature characteristic is applicable to gases only,and not to liquids,because the viscosity of a liquid may greatly vary depending upon the temperature conditions.
 
Applications
  • For vacuum systems
  • For semiconductor manufacturing lines
  • For production lines where toxic or corrosive gases are present
 
Standard Specifications
Rated flow ranges See Table of Rated Flow Ranges below.
Regulating screw rotating speed Approx. 13-16 turns
Max. operating pressure 1MPa
Upper limit of working temperature 120°C
Fluids Gases and liquids
Materials of parts exposed to fluids SUS316,Teflon,Viton(joint)
Connection end 1/4 swage-lock(for joint)*Optional:1/8SW
 
Optional Specifications
  • Special types of joints(Please contact us for consultation.)
 
Table of Rated Flow Ranges(Reference)Due to operating conditions and instrumental errors, there may be differences in the range of 80% to 130% between the values indicated in this table and those that are actually used by the customer.
Flow rate when the outlet valve is totally opened to release flows into air
Needle # Supply pressure(MPa)(Air at 20°C) Supply pressure(MPa)(Water at 20°C)
0.05 0.1 0.2 0.3 0.4 0.5 0.6 0.05 0.1 0.15
BSS1 0.016 0.032 0.058 0.086 0.015 0.140 0.180 - - -
BS1 0.074 0.12 0.20 0.28 0.34 0.44 0.52 - - -
B1 0.10 0.16 0.24 0.34 0.42 0.53 0.60 - - -
B2 0.12 0.19 0.29 0.41 0.50 0.63 0.72 0.0010 0.0017 0.0024
B2A 0.25 0.39 0.60 0.82 1.05 1.30 1.50 0.010 0.015 0.018
B3 0.67 0.98 1.55 2.10 2.65 3.20 3.70 0.019 0.029 0.037
B3B 1.10 1.7 2.5 3.4 4.3 5.1 5.9 0.034 0.05 0.067
B4 4.4 6.3 9.4 12.0 16.0 19.2 22.0 0.15 0.21 0.27
B4A 6.7 9.8 13.9 19.0 24.0 27.9 31.6 0.23 0.32 0.40
B5 7.8 11.3 16.5 20.0 28.0 33.0 38.0 0.26 0.35 0.46
B6 15.3 20.5 32.0 44.0 55.0 68.0 80.0 0.46 0.66 0.79
B6A 21.0 32.0 51.0 70.0 90.0 110 128 0.72 1.0 1.15
B7 40.0 55.0 100 130 170 195 230 1.18 1.7 1.95
 
 
CV Values
Needle # Max. CV value
BSS1 0.00008
BS1 0.0003
B1 0.0004
B2 0.0005
B2A 0.00098
B3 0.0025
B3B 0.0043
B4 0.016
B4A 0.025
B5 0.028
B6 0.051
B6A 0.08
B7 0.14
 
Notes
  • We can suggest you the needle number most suitable for your equipment if the pressure, fluid, flow rate and other operating conditions of your equipment are known. Please use the above table for reference only.
 
 
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For further information, please contact NetMotion, Inc. at 1.800.790.7837 or 510.578.2814 or e-mail sales@netmotion.com
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