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Flow Switch, Paddle Style Flow Switch IF3 Series (Part Numbers)

Flow Switch, Paddle Style Flow Switch IF3 Series

SMC

SMC

A flow switch made by SMC.

[Features]
· Piping sizes range from 3/4B to 6B
· Supports equivalent to IP42, IP44

[Applications]
Used to detect and confirm liquid flow as a general-purpose water cutoff and water reduction relay in air conditioning, water supply equipment, etc.

(i)Caution

  • See catalog for specification details.
  • Product pictures are representations. CAD data is not supported for some model numbers.

PDF

Part Number

Configured Part Number is shown.

Specifications of Flow Switch Paddle Type Flow Switch IF3 Series

External appearance of IF3 Series

External appearance of IF3 Series

FluidCopper alloyWater and non corrosive liquid
SUS304Liquid that does not corrode SUS304
Maximum operating pressure1.0 MPa
Water resistance1.75 MPa
Insulation Resistance100 MΩ or more (500 DC by insulation resistance tester)
Withstand Voltage1,500 V AC for 1 minute
Contact1ab
Connection port size3/4, 1

Microswitch rating

VoltageNon-inductive load (A)Inductive load (A)
Load resistanceLamp loadInductive loadElectric motor load
N.C.N.O.N.C.N.O.N.C.N.O.N.C.N.O.
AC125V151531.5151552.5
AC250V15152.51.25151531.5
DC8V151531.5151552.5
DC14V151531.5101052.5
DC30V6631.55552.5
DC125V0.50.50.50.50.050.050.050.05
DC250V0.250.250.250.250.030.030.030.03

Liquid temperature and applicable ambient temperature range

Fluid Temperature*) Applicable ambient temperature
70°C or less70°C (70°C) or less
80°C58°C (60°C) or less
90°C47°C (50°C) or less
100°C35°C (40°C) or less

*) () is for IF32□
* To protect the micro switch, the ambient temperature should be low when the liquid temperature exceeds 70°C.

Waterproof type

Open typeWhen used indoors where any water droplets do not splash
Drip-proof/rain-proof type
(JIS C0920)		When used indoors or outdoors where water droplets may splash (IP42 equivalent)
Splash-proof/water-jet-protection type
（JIS C0920）		It has a sealed structure and when used outdoors and in locations temporarily exposed by a flow of water, or in adverse environmental conditions such as near the coast (IP44 equivalent)

Diagram

Structural drawing of IF3 Series

Structural drawing of IF3 Series

NumberNameMaterial
IF30□IF31□IF32□
1CoverSPCDSPCDADC12
2Mounting plateSPCCSUS304SUS304
3BellowsPBP or SUS304
4Main bodyC3604B or SUS304
5Movable rodC2700W or SUSXM7
6PaddleSUS304
7O-ringNBR or FPM

Flow Rate Characteristics Table

Fluid: Water, outlet pressure: OMPa
Threaded depth: 9 mm (3/4), 11 mm (1)

Flow SwitchInstallation classificationSet flow rate adjustment range L/minON flow rate setting flow velocity range m/s
MinimumMax.
Tubing outer diameterPaddle sizeON flow rateOFF flow rate minON flow rateOFF flow rate min
IF3□0-063/4Length14738330.66 to 1.79
3/4Medium18950440.85 to 2.36
3/4Short221160531.04 to 2.83
IF3□1-101Short201060550.56 to 1.67
1 1/4Short3417100900.57 to 1.67
1 1/2Short52261601400.63 to 1.95
2Medium45231401250.34 to 1.06
2 1/2Medium90452802500.41 to 1.29
3Length80402502200.26 to 0.81
4Length170855504800.33 to 1.05
5Length3001501,0008700.37 to 1.24
6Length4602301,5001,3000.40 to 1.32
IF3□3-101Short36181101001.00 to 3.05
1 1/4Short54271601400.90 to 2.67
1 1/2Short90452702301.10 to 3.29
2Medium90452702300.68 to 2.05
2 1/2Medium160805004200.74 to 2.30
3Length160805004200.52 to 1.63
4Length3201601,0008000.61 to 1.91
5Length5602801,8001,4500.69 to 2.23
6Length8004002,6002,0000.70 to 2.28

ON flow rate: Flow rate at which the micro switch operates when the flow rate increases
OFF flow rate: Flow rate at which the micro switch operates when the flow rate decreases

  • * The maximum flow rate is twice the maximum ON flow rate.
  • * The above data is for reference only. The operating flow rate may differ from the above values due to the threaded depth, orientation, piping conditions and individual product variations during installation, therefore, due care is needed to use it near the minimum and maximum values of each set flow rate adjustment range.

Change in ON flow rate due to pressure (Typical value)

Graph of change in ON flow rate with pressure (typical value)

Graph of change in ON flow rate with pressure (typical value)

Flow rate-pressure drop curve (Typical value)

Graph of flow rate-pressure drop curve (typical value)

Graph of flow rate-pressure drop curve (typical value)

Dimensions

 

(Units: mm)

 

Open type: Dimensional drawing of 300, 301, 303

Open type: Dimensional drawing of 300, 301, 303

Part numberDimensions
Connection port sizeABCDEF
IF3003/428313422137101
IF30113762892818898
IF30312939562815598
Drip-proof/rain-proof type: Dimensional drawing of 310, 311, 313

Drip-proof/rain-proof type: Dimensional drawing of 310, 311, 313

Part numberDimensions
Connection port sizeABCDEF
IF3103/428313422137101
IF31113762892818898
IF31312939562815598
Splash-proof/water-jet-protection type: Dimensional drawing of 320, 321, 323

Splash-proof/water-jet-protection type: Dimensional drawing of 320, 321, 323

Part numberDimensions
Connection port sizeABCDEF
IF3203/428313422141.3105.4
IF321137628928194104
IF323129395628161104

Flow rate-velocity diagram (* Typical value)

Graph of flow rate-velocity

Graph of flow rate-velocity

* The number in parentheses indicates the inner diameter of the gas pipe

Notes

Installation/wiring

  1. 1.Screw in the arrow on the cover according to the flow of fluid. The screw-in depth should be 9 mm ± 1 mm for 3/4B and 11 mm ± 1.2 mm for 1B.
  2. 2.The mounting direction can only be vertical to the horizontal pipe.
  3. 3.Before and after the pipe on which the product is mounted, a straight section that is 5 times or more the opening diameter of the pipe should be provided in order to keep away as far as possible from anything that disturbs the flow such as elbows and valves.
  4. 4.Each model comes with 3 types of paddles, short, medium and long. Use one paddle according to the pipe size and the set flow rate.
  5. 5.IF3 * If the long paddle is mounted to the O type, the pipe may contact the tip of the paddle. This is because the gap between the paddle and the pipe is reduced to detect a small flow rate. Therefore, if the paddle comes in contact, please make alteration to the paddle tip.
  6. 6.If any piping such as one not in line with standards is used, the paddle may come into contact with the pipe. In that case, perform alteration to the paddle.
  7. 7.It cannot be used when water hammer or pulsating pressure is applied to the fluid.
  8. 8.Wire the micro switch according to the symbols on the upper insulator. (It is the opposite of the terminal symbol on the micro switch. The terminals are screw terminals. )
  9. 9.The screws used for the terminal are M4.
  10. 10.Use JIS standard products for mounting piping fittings. Please use commercially available reducing tee for 1 1/4B to 3B. For 4B to 6B, cut the 1B socket in half and weld it.

Compatible fitting

 

(Units: mm)

 

1 1/4B to 3B

Piping BReducing tee B
1 1/41 1/4 × 1 1/4 × 1
1 1/21 1/2 × 1 1/2 × 1
22 × 2 × 1
2 1/22 1/2 × 2 1/2 × 1
33 × 3 × 1

Reducing tee: JIS B 2301
Socket: JIS B 2302
Tube: JIS B 3452

For 4B to 6B

Applicable fitting (For 4B to 6B)

Applicable fitting (For 4B to 6B)

Internal wiring diagram

Internal wiring diagram

Internal wiring diagram

SymbolContact
CCOMMON
ANORMALLY OPEN
BNORMALLY CLOSED
  • *See the SMC catalog for information other than that detailed above.
  • *Product pictures are representative images.
30
60
90
  1. 1
Part Number
Part NumberMinimum order quantityVolume DiscountDays to ShipFlow Rate Range (Max. Value)
(L/min) 		Pipe Port Type Plumbing Thread Type Plumbing Thread Nominal Liquid contact parts material Applicable Fluid Rating Flow Range
(L/min) 		Details Type Liquid contact parts seal material CE compliant

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  1. 1
 

Basic Information

Type Flow Switch Fluid Type Water / Coolant Sensor, Monitor Structure Integrated shape
Output Method Switch Fluid Characteristics Noncorrosive Number of Output Points 1
Contact configuration 1ab

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Specification/Dimensions

  • Flow Rate Range (Max. Value)(L/min)

    • 50～Less than 100
    • 500～Less than 5000

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  • Pipe Port Type

    • Threads
      • Male thread
    • Female Thread

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  • Plumbing Thread Type

    • Rc (R)
      • R
    • NPT
      • NPT

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  • Plumbing Thread Nominal

    • 3/4
      • 3/4
    • 1
      • 1

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  • Liquid contact parts material

    • Copper Alloy
      • Brass•Phosphor Bronze
    • Stainless Steel
      • SUS304

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  • Applicable Fluid

    • Liquid that does not corrode SUS304
    • Water and non corrosive liquid

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  • Rating Flow Range(L/min)

    • 14 to 60
    • 20 to 1,500
    • 36 to 2,600

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  • Details Type

    • Drip-proof/rainproof type (equivalent to IP42)
    • Splash-proof/water-jet-protection type (IP44 equivalent)
    • Open type

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  • Liquid contact parts seal material

    • FPM
    • NBR

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  • CE compliant

    • CE-compliant product
    • Non-Compatible
    • None

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  • type

    • IF300
    • IF301
    • IF303
    • IF310
    • IF311
    • IF313
    • IF320
    • IF321
    • IF323

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  • CAD

    • 2D
    • 3D

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Days to Ship

    • All
    • 21 Day(s) or Less

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