Airtac 2W series: two-way fluid solenoid valve - 2W20020B

Photos are for reference only. Not all models have pictures.

Description

Specifications: 2W20020B is an AirTAC 2W series internally piloted, normally closed 2/2-way fluid-control valve. It has PT3/4 ports, a 20 mm orifice and a 24 V DC coil. The blank electrical-entry code selects the terminal version.

Product Catalogs

Download Legacy 2W Catalog (PDF)

Download New 2WA Catalog (PDF)

For detailed product dimensions and mounting drawings, please download and refer to the PDF catalog.

Legacy-to-New Model and Ordering Information

Orders placed for legacy 2W20020B will be supplied as 2WA20020B under our store's replacement policy. The technical information below documents the legacy 2W20020B; use the new 2WA catalog for the supplied 2WA20020B.

Compare the correct terminal or grommet drawing before installation. The replacement policy does not establish identical dimensions, mounting geometry or interchangeable coils.

2W vs 2WA: Length, Dimensions and Replacement Guide

Model Code Explained

Code Meaning for this model
2W 2W series 2/2-way fluid-control valve; normally closed.
200 20 mm orifice; internally piloted configuration.
20 3/4 in port size; selected thread: PT3/4.
B Coil supply: 24 V DC.
(blank entry code) Terminal electrical entry.
(blank thread suffix) PT thread standard.

Technical Specifications - 2W

The following values are from 2W PDF page 3 and describe the listed configuration. Pressure differential is the inlet-to-outlet pressure difference; proof pressure is a separate test value.

Parameter Details
Valve function 2/2-way: two ports and two operating positions
Actuation Internally piloted
Initial state Normally closed
Media Air, water and oil
Body material Brass
Standard seal material FPM-F; contact the supplier if another seal material is required
Viscosity limit Below 20 cSt
Port thread PT3/4
Orifice diameter 20 mm
Flow coefficient Cv 9.5
Effective area / section 170 mm²
Pressure differential 0.05-1.0 MPa operating pressure differential
Proof pressure 1.5 MPa
Catalog reference weight 950 g
Water temperature 1 to 80°C
Air temperature -20 to 90°C; the catalog specifies an air dew point of -20°C or lower
Oil temperature -10 to 80°C; the catalog footnote states 50 cSt or less at the lower-temperature condition
Ambient temperature -20 to 70°C

The catalog weight is the terminal-entry reference. It is a reference value, not a recorded weighing of this individual item.

The general viscosity limit and the lower-temperature oil footnote are retained as separate catalog statements. Check the actual medium and temperature against both before selection.

Electrical Specifications

Parameter Details
Coil designation for this entry CDA116
Rated voltage 24 V DC
Voltage tolerance ±10% for DC
Electrical entry Terminal
Protection class IP65
DC power consumption 6.5 W
Temperature rise on DC 30°C
Supply frequency Not applicable to DC
Insulation class Class B

Coil temperature rise is distinct from the ambient and fluid-temperature limits. The power figures are the values tabulated for the selected AC or DC supply.

Features and Operation

  • This 2/2-way valve is normally closed when not energized. The 150, 200 and 250 branches use internal pilot operation and specify a minimum operating pressure differential of 0.05 MPa.
  • The compact brass body is intended for air, water and oil within the catalog limits. The catalog describes rapid response, easy installation and dismantling.
  • Terminal and grommet electrical entries are separate order-code choices. The grommet option includes the catalog-specified 0.5 m wire.
  • The illustrated mounting bracket is optional. It is not included merely because it appears in a dimensional drawing.

External and Mounting Dimensions

These are the terminal-entry drawing values in the 2W PDF, page 4. Each letter below refers to its own dimension line; do not combine unrelated spans into an assumed overall length × width × height.

Drawing letter Dimension / specification
A 78.5 mm
AB 82 mm
B 53 mm
BA 33.5 mm
C 115.5 mm
D 90 mm
E 6.4 mm
EA 8 mm
EB 75 mm
EC 40 mm
F 34 mm
P PT3/4

The terminal drawing includes both A and AB; the grommet drawing uses A and does not tabulate AB. D is a different span that includes the illustrated optional bracket arrangement. EB and EC are separate drawing dimensions. The two fluid ports are marked 2-P. Match the relevant drawing and connector orientation before installation.

Catalog consistency note: The terminal drawing depicts A as a span that includes AB, but its table lists A = 78.5 mm and AB = 82 mm. These are the printed values and have not been altered. Because A is smaller than AB, do not use A as a verified overall length; obtain a confirmed manufacturer drawing for the supplied model before setting installation clearance.

For detailed product dimensions and mounting drawings, please download and refer to the PDF catalog.

Flow and Performance Reference

Parameter Details
Air chart vertical axis Downstream pressure P2; the curves identify upstream pressure P1, with marked pressure values up to 1.0 MPa and the minimum working-pressure boundary
Air chart flow axis Orifice Ø20 mm: Q in L/min (ANR); marked values 5000-20000, in steps of 5000
Water chart vertical axis Flow Q in L/min; logarithmic labels 30-500
Water chart horizontal axis Pressure differential ΔP = P1 - P2, 0.02-0.5 MPa

The original flow charts are on 2W PDF page 4. Chart axes are reading scales, not guaranteed flow ratings. Use the curve for the correct orifice and medium; do not substitute a value estimated from a graph for a tabulated Cv or effective area.

Internal Components - Catalog Reference

The following numbered key is the catalog illustration for 2W150 (grommet), on PDF page 3. It is a drawing reference, not an included-parts quantity list or a list of independent ordering codes. Other size and entry versions must be checked against their own assembly.

Drawing number Component
1 Body
2 Filter
3 Piston
4 Wear ring
5 O-ring
6 Cover
7 Screw
8 Spring
9 Spring
10 Screw
11 Fixed cap
12 Washer
13 Coil assembly
14 Washer
15 E-clip
16 Movable core
17 Fixed plate
18 O-ring
19 Airtight ring
20 Plug
21 Spring
22 Spacer

Mounting Accessory Reference

The 2W catalog directs accessory orders to the 2S accessory ordering information (printed page 196). That shared ordering table identifies F-2S200LB for this size.

The bracket is optional. The supplied catalog does not tabulate a separate bracket weight or a package-component count. Select the bracket for the actual valve family and drawing; legacy and new bracket compatibility must not be inferred from a similar listing name.

Series Ordering Options

These are alternative series choices, not additional configurations included with this order. The Model Code Explained table above states the actual selection.

Ordering category Available catalog options
Orifice / port combinations 150: 15 mm / 15 (1/2 in); 200: 20 mm / 20 (3/4 in); 250: 25 mm / 25 (1 in)
Voltage codes A = 220 V AC; B = 24 V DC; C = 110 V AC; E = 24 V AC; F = 12 V DC
Electrical-entry code Blank = terminal; I = grommet with a 0.5 m wire
Thread suffix Blank = PT; G = G thread; T = NPT
Product form

Specifications: 2W20020B is an AirTAC 2W series internally piloted, normally closed 2/2-way fluid-control valve. It has PT3/4 ports, a 20... Read more

SKU: 2W20020B

$115.08 Incl. VAT

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    Description

    Specifications: 2W20020B is an AirTAC 2W series internally piloted, normally closed 2/2-way fluid-control valve. It has PT3/4 ports, a 20 mm orifice and a 24 V DC coil. The blank electrical-entry code selects the terminal version.

    Product Catalogs

    Download Legacy 2W Catalog (PDF)

    Download New 2WA Catalog (PDF)

    For detailed product dimensions and mounting drawings, please download and refer to the PDF catalog.

    Legacy-to-New Model and Ordering Information

    Orders placed for legacy 2W20020B will be supplied as 2WA20020B under our store's replacement policy. The technical information below documents the legacy 2W20020B; use the new 2WA catalog for the supplied 2WA20020B.

    Compare the correct terminal or grommet drawing before installation. The replacement policy does not establish identical dimensions, mounting geometry or interchangeable coils.

    2W vs 2WA: Length, Dimensions and Replacement Guide

    Model Code Explained

    Code Meaning for this model
    2W 2W series 2/2-way fluid-control valve; normally closed.
    200 20 mm orifice; internally piloted configuration.
    20 3/4 in port size; selected thread: PT3/4.
    B Coil supply: 24 V DC.
    (blank entry code) Terminal electrical entry.
    (blank thread suffix) PT thread standard.

    Technical Specifications - 2W

    The following values are from 2W PDF page 3 and describe the listed configuration. Pressure differential is the inlet-to-outlet pressure difference; proof pressure is a separate test value.

    Parameter Details
    Valve function 2/2-way: two ports and two operating positions
    Actuation Internally piloted
    Initial state Normally closed
    Media Air, water and oil
    Body material Brass
    Standard seal material FPM-F; contact the supplier if another seal material is required
    Viscosity limit Below 20 cSt
    Port thread PT3/4
    Orifice diameter 20 mm
    Flow coefficient Cv 9.5
    Effective area / section 170 mm²
    Pressure differential 0.05-1.0 MPa operating pressure differential
    Proof pressure 1.5 MPa
    Catalog reference weight 950 g
    Water temperature 1 to 80°C
    Air temperature -20 to 90°C; the catalog specifies an air dew point of -20°C or lower
    Oil temperature -10 to 80°C; the catalog footnote states 50 cSt or less at the lower-temperature condition
    Ambient temperature -20 to 70°C

    The catalog weight is the terminal-entry reference. It is a reference value, not a recorded weighing of this individual item.

    The general viscosity limit and the lower-temperature oil footnote are retained as separate catalog statements. Check the actual medium and temperature against both before selection.

    Electrical Specifications

    Parameter Details
    Coil designation for this entry CDA116
    Rated voltage 24 V DC
    Voltage tolerance ±10% for DC
    Electrical entry Terminal
    Protection class IP65
    DC power consumption 6.5 W
    Temperature rise on DC 30°C
    Supply frequency Not applicable to DC
    Insulation class Class B

    Coil temperature rise is distinct from the ambient and fluid-temperature limits. The power figures are the values tabulated for the selected AC or DC supply.

    Features and Operation

    • This 2/2-way valve is normally closed when not energized. The 150, 200 and 250 branches use internal pilot operation and specify a minimum operating pressure differential of 0.05 MPa.
    • The compact brass body is intended for air, water and oil within the catalog limits. The catalog describes rapid response, easy installation and dismantling.
    • Terminal and grommet electrical entries are separate order-code choices. The grommet option includes the catalog-specified 0.5 m wire.
    • The illustrated mounting bracket is optional. It is not included merely because it appears in a dimensional drawing.

    External and Mounting Dimensions

    These are the terminal-entry drawing values in the 2W PDF, page 4. Each letter below refers to its own dimension line; do not combine unrelated spans into an assumed overall length × width × height.

    Drawing letter Dimension / specification
    A 78.5 mm
    AB 82 mm
    B 53 mm
    BA 33.5 mm
    C 115.5 mm
    D 90 mm
    E 6.4 mm
    EA 8 mm
    EB 75 mm
    EC 40 mm
    F 34 mm
    P PT3/4

    The terminal drawing includes both A and AB; the grommet drawing uses A and does not tabulate AB. D is a different span that includes the illustrated optional bracket arrangement. EB and EC are separate drawing dimensions. The two fluid ports are marked 2-P. Match the relevant drawing and connector orientation before installation.

    Catalog consistency note: The terminal drawing depicts A as a span that includes AB, but its table lists A = 78.5 mm and AB = 82 mm. These are the printed values and have not been altered. Because A is smaller than AB, do not use A as a verified overall length; obtain a confirmed manufacturer drawing for the supplied model before setting installation clearance.

    For detailed product dimensions and mounting drawings, please download and refer to the PDF catalog.

    Flow and Performance Reference

    Parameter Details
    Air chart vertical axis Downstream pressure P2; the curves identify upstream pressure P1, with marked pressure values up to 1.0 MPa and the minimum working-pressure boundary
    Air chart flow axis Orifice Ø20 mm: Q in L/min (ANR); marked values 5000-20000, in steps of 5000
    Water chart vertical axis Flow Q in L/min; logarithmic labels 30-500
    Water chart horizontal axis Pressure differential ΔP = P1 - P2, 0.02-0.5 MPa

    The original flow charts are on 2W PDF page 4. Chart axes are reading scales, not guaranteed flow ratings. Use the curve for the correct orifice and medium; do not substitute a value estimated from a graph for a tabulated Cv or effective area.

    Internal Components - Catalog Reference

    The following numbered key is the catalog illustration for 2W150 (grommet), on PDF page 3. It is a drawing reference, not an included-parts quantity list or a list of independent ordering codes. Other size and entry versions must be checked against their own assembly.

    Drawing number Component
    1 Body
    2 Filter
    3 Piston
    4 Wear ring
    5 O-ring
    6 Cover
    7 Screw
    8 Spring
    9 Spring
    10 Screw
    11 Fixed cap
    12 Washer
    13 Coil assembly
    14 Washer
    15 E-clip
    16 Movable core
    17 Fixed plate
    18 O-ring
    19 Airtight ring
    20 Plug
    21 Spring
    22 Spacer

    Mounting Accessory Reference

    The 2W catalog directs accessory orders to the 2S accessory ordering information (printed page 196). That shared ordering table identifies F-2S200LB for this size.

    The bracket is optional. The supplied catalog does not tabulate a separate bracket weight or a package-component count. Select the bracket for the actual valve family and drawing; legacy and new bracket compatibility must not be inferred from a similar listing name.

    Series Ordering Options

    These are alternative series choices, not additional configurations included with this order. The Model Code Explained table above states the actual selection.

    Ordering category Available catalog options
    Orifice / port combinations 150: 15 mm / 15 (1/2 in); 200: 20 mm / 20 (3/4 in); 250: 25 mm / 25 (1 in)
    Voltage codes A = 220 V AC; B = 24 V DC; C = 110 V AC; E = 24 V AC; F = 12 V DC
    Electrical-entry code Blank = terminal; I = grommet with a 0.5 m wire
    Thread suffix Blank = PT; G = G thread; T = NPT

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