Flow Switch, Paddle Style Flow Switch IF3 Series
Brand :
SMC
Caution
- See catalog for specification details.
- Product pictures are representations. CAD data is not supported for some model numbers.
Product Description
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.
Specifications of Flow Switch Paddle Type Flow Switch IF3 Series
External appearance of IF3 Series
| Fluid | Copper alloy | Water and non corrosive liquid |
|---|---|---|
| SUS304 | Liquid that does not corrode SUS304 | |
| Maximum operating pressure | 1.0 MPa | |
| Water resistance | 1.75 MPa | |
| Insulation Resistance | 100 MΩ or more (500 DC by insulation resistance tester) | |
| Withstand Voltage | 1,500 V AC for 1 minute | |
| Contact | 1ab | |
| Connection port size | 3/4, 1 | |
Microswitch rating
| Voltage | Non-inductive load (A) | Inductive load (A) | ||||||
|---|---|---|---|---|---|---|---|---|
| Load resistance | Lamp load | Inductive load | Electric motor load | |||||
| N.C. | N.O. | N.C. | N.O. | N.C. | N.O. | N.C. | N.O. | |
| AC125V | 15 | 15 | 3 | 1.5 | 15 | 15 | 5 | 2.5 |
| AC250V | 15 | 15 | 2.5 | 1.25 | 15 | 15 | 3 | 1.5 |
| DC8V | 15 | 15 | 3 | 1.5 | 15 | 15 | 5 | 2.5 |
| DC14V | 15 | 15 | 3 | 1.5 | 10 | 10 | 5 | 2.5 |
| DC30V | 6 | 6 | 3 | 1.5 | 5 | 5 | 5 | 2.5 |
| DC125V | 0.5 | 0.5 | 0.5 | 0.5 | 0.05 | 0.05 | 0.05 | 0.05 |
| DC250V | 0.25 | 0.25 | 0.25 | 0.25 | 0.03 | 0.03 | 0.03 | 0.03 |
Liquid temperature and applicable ambient temperature range
| Fluid Temperature | *) Applicable ambient temperature |
|---|---|
| 70°C or less | 70°C (70°C) or less |
| 80°C | 58°C (60°C) or less |
| 90°C | 47°C (50°C) or less |
| 100°C | 35°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 type | When 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
| Number | Name | Material | ||
|---|---|---|---|---|
| IF30□ | IF31□ | IF32□ | ||
| 1 | Cover | SPCD | SPCD | ADC12 |
| 2 | Mounting plate | SPCC | SUS304 | SUS304 |
| 3 | Bellows | PBP or SUS304 | ||
| 4 | Main body | C3604B or SUS304 | ||
| 5 | Movable rod | C2700W or SUSXM7 | ||
| 6 | Paddle | SUS304 | ||
| 7 | O-ring | NBR or FPM | ||
Flow Rate Characteristics Table
Fluid: Water, outlet pressure: OMPa
Threaded depth: 9 mm (3/4), 11 mm (1)
| Flow Switch | Installation classification | Set flow rate adjustment range L/min | ON flow rate setting flow velocity range m/s | ||||
|---|---|---|---|---|---|---|---|
| Minimum | Max. | ||||||
| Tubing outer diameter | Paddle size | ON flow rate | OFF flow rate min | ON flow rate | OFF flow rate min | ||
| IF3□0-06 | 3/4 | Length | 14 | 7 | 38 | 33 | 0.66 to 1.79 |
| 3/4 | Medium | 18 | 9 | 50 | 44 | 0.85 to 2.36 | |
| 3/4 | Short | 22 | 11 | 60 | 53 | 1.04 to 2.83 | |
| IF3□1-10 | 1 | Short | 20 | 10 | 60 | 55 | 0.56 to 1.67 |
| 1 1/4 | Short | 34 | 17 | 100 | 90 | 0.57 to 1.67 | |
| 1 1/2 | Short | 52 | 26 | 160 | 140 | 0.63 to 1.95 | |
| 2 | Medium | 45 | 23 | 140 | 125 | 0.34 to 1.06 | |
| 2 1/2 | Medium | 90 | 45 | 280 | 250 | 0.41 to 1.29 | |
| 3 | Length | 80 | 40 | 250 | 220 | 0.26 to 0.81 | |
| 4 | Length | 170 | 85 | 550 | 480 | 0.33 to 1.05 | |
| 5 | Length | 300 | 150 | 1,000 | 870 | 0.37 to 1.24 | |
| 6 | Length | 460 | 230 | 1,500 | 1,300 | 0.40 to 1.32 | |
| IF3□3-10 | 1 | Short | 36 | 18 | 110 | 100 | 1.00 to 3.05 |
| 1 1/4 | Short | 54 | 27 | 160 | 140 | 0.90 to 2.67 | |
| 1 1/2 | Short | 90 | 45 | 270 | 230 | 1.10 to 3.29 | |
| 2 | Medium | 90 | 45 | 270 | 230 | 0.68 to 2.05 | |
| 2 1/2 | Medium | 160 | 80 | 500 | 420 | 0.74 to 2.30 | |
| 3 | Length | 160 | 80 | 500 | 420 | 0.52 to 1.63 | |
| 4 | Length | 320 | 160 | 1,000 | 800 | 0.61 to 1.91 | |
| 5 | Length | 560 | 280 | 1,800 | 1,450 | 0.69 to 2.23 | |
| 6 | Length | 800 | 400 | 2,600 | 2,000 | 0.70 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)
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
| Part number | Dimensions | ||||||
|---|---|---|---|---|---|---|---|
| Connection port size | A | B | C | D | E | F | |
| IF300 | 3/4 | 28 | 31 | 34 | 22 | 137 | 101 |
| IF301 | 1 | 37 | 62 | 89 | 28 | 188 | 98 |
| IF303 | 1 | 29 | 39 | 56 | 28 | 155 | 98 |
Drip-proof/rain-proof type: Dimensional drawing of 310, 311, 313
| Part number | Dimensions | ||||||
|---|---|---|---|---|---|---|---|
| Connection port size | A | B | C | D | E | F | |
| IF310 | 3/4 | 28 | 31 | 34 | 22 | 137 | 101 |
| IF311 | 1 | 37 | 62 | 89 | 28 | 188 | 98 |
| IF313 | 1 | 29 | 39 | 56 | 28 | 155 | 98 |
Splash-proof/water-jet-protection type: Dimensional drawing of 320, 321, 323
| Part number | Dimensions | ||||||
|---|---|---|---|---|---|---|---|
| Connection port size | A | B | C | D | E | F | |
| IF320 | 3/4 | 28 | 31 | 34 | 22 | 141.3 | 105.4 |
| IF321 | 1 | 37 | 62 | 89 | 28 | 194 | 104 |
| IF323 | 1 | 29 | 39 | 56 | 28 | 161 | 104 |
Flow rate-velocity diagram (* Typical value)
Graph of flow rate-velocity
* The number in parentheses indicates the inner diameter of the gas pipe
Notes
Installation/wiring
- 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.The mounting direction can only be vertical to the horizontal pipe.
- 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.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.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.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.It cannot be used when water hammer or pulsating pressure is applied to the fluid.
- 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.The screws used for the terminal are M4.
- 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 B | Reducing tee B |
|---|---|
| 1 1/4 | 1 1/4 × 1 1/4 × 1 |
| 1 1/2 | 1 1/2 × 1 1/2 × 1 |
| 2 | 2 × 2 × 1 |
| 2 1/2 | 2 1/2 × 2 1/2 × 1 |
| 3 | 3 × 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)
Internal wiring diagram
Internal wiring diagram
| Symbol | Contact |
|---|---|
| C | COMMON |
| A | NORMALLY OPEN |
| B | NORMALLY CLOSED |
- *See the SMC catalog for information other than that detailed above.
- *Product pictures are representative images.