PF2W720-N04-27 SMC Corporation of America, PF2W720-N04-27 Datasheet - Page 10

• Manufacturer Part Number: PF2W720-N04-27
• Description: SENSOR FLOW H2O 2-16L/MIN NPN
• Manufacturer: SMC Corporation of America
• Series: PF2Wr

Specifications of PF2W720-N04-27

• Sensing Range: 2 ~ 16 LPM
• Flow Sensor Type: Liquid
• Voltage - Input: 12 ~ 24 V
• Port Size: Female, 3/8", 0.375" (9.525mm) NPT, 1/2", 0.5" (12.7mm) NPT
• Material - Body: Steel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Switch Function/rating: -
• Other names: 606-1036

1. Operate the switch only within the specified
2. Do not exceed the maximum allowable load
3. Do not use a load that generates surge
4. Since the type of fluid varies depending on the
5. Monitor the internal voltage drop of the switch.
[For air]
6. Use the switch within the specified flow rate
[For water]
7. Use the switch within the specified flow rate
8. Design the system so that the fluid always fills
9. Operate at a flow rate within the flow rate
16-11-32
voltage.
Use of the switch outside the range of the specified voltage
can cause not only malfunction and damage of the switch but
also electrocution and fire.
specification.
A load exceeding the maximum load specification can cause
damage to the switch.
voltage.
Although surge protection is installed in the circuit at the
output side of the switch, damage may still occur if a surge is
applied repeatedly. When a surge generating a load such as a
relay or solenoid is directly driven, use a type of switch with a
built-in surge absorbing element.
product, be sure to verify the specifications.
The switches do not have an explosion proof rating. To prevent
a possible fire hazard, do not use with flammable gases or
fluids.
When operating below a specified voltage, it is possible that
the load may be ineffective even though the pressure switch
function is normal. Therefore, the formula below should be
satisfied after confirming the minimum operating voltage of the
load.
measurement and operating pressure.
Operating beyond the specified flow rate and operating
pressure can damage the switch.
measurement and operating pressure.
Operating beyond the specified flow rate and operating
pressure can damage the switch. Avoid especially the
application of pressure above specifications through a water
hammer.
<Examples of pressure reduction measures>
a) Use a device such as a water hammer relief valve to slow
b) Absorb impact pressure by using an accumulator or elastic
c) Keep the piping length as short as possible.
the detection passage.
Especially for vertical mounting, introduce the fluid from the
bottom to the top.
measurement range.
If operated outside of the flow rate measurement range, the
Karman
measurement will not be possible.
Warning
the valve’s closing speed.
piping material such as a rubber hose.
Supply
voltage
vortex
Series
Specific Product Precautions 1
Be sure to read before handling.
Design and Selection
–
Internal voltage
drop of switch
will
not
PF2A/PF2W
be
generated
>
Minimum operating
voltage of load
and
normal
[Series PF2A7„„H]
10. Sudden increase of flow rate may destroy the
1. Mount switches using the proper tightening
2. Apply wrench only to the metal part of the
3. Monitor the flow direction of the fluid.
4. Remove dirt and dust from inside the piping
5. Do not drop or bump.
6. Hold the body of the switch when handling.
7. Do not use until you can verify that
8. Avoid the mounting orientation with the
1. Data of the flow switch will be stored even
torque.
When a switch is tightened beyond the specified tightening
torque, the switch may be damaged. On the other hand,
tightening below the specified tightening torque may cause
the installation screws to come loose during operation.
pipings when installing the flow switch onto
the system piping.
Do not apply wrench to anything other than the piping
attachment as this may damage the switch.
Install and connect piping so that fluid flows in the direction
of the arrow indicated on the body.
using an air blower before connecting piping
to the switch.
Do not drop, bump, or apply excessive impacts (490 m/s
while handling. Although the external body of the switch
(switch case) may not be damaged, the inside of the switch
could be damaged and cause a malfunction.
The tensile strength of the cord is 49N. Applying a greater
pulling force on it can cause a malfunction. When handling,
hold the body of the switch – do not dangle it from the cord.
equipment can operate properly.
Following mounting, repair, or retrofit,
mounting by conducting suitable function and leakage tests
after piping and power connections have been made.
bottom of the body facing up.
The switch can be mounted in any way such as vertically or
horizontally, however, avoid the mounting orientation with the
bracket on the bottom of the body facing upward.
flow sensor. Ensure to open/close the flow
control valve not to exceed the maximum flow
rate measurement values.
after the power is turned off.
Input data will be stored in EEPROM so that the data will not
be lost after the flow switch is turned off. (Data can be
rewritten for up to one million times, and data will be stored
for up to 20 years.)
Caution
Warning
Thread
Rc 1/8
Rc 1/4
Rc 3/8
Rc 1/2
Tightening torque N⋅m
Design and Selection
12 to 14
22 to 24
28 to 30
7 to 9
Mounting
Rc 3/4
Rc 1
Rc 1 1/2
Rc 2
Thread
Tightening torque N⋅m
verify correct
28 to 30
36 to 38
48 to 50
48 to 50
2
)