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Trim to Size Paddle Type Liquid Flow Switch
FSW-25
PLACE ORDER - Aluminum Alloy IP65 Head
- Easy to Install
- Less than 3 psig Pressure Drop
- 1" PT Connection
Description
Description
The FSW-25 flow switch utilizes the force of liquid flow to propel itspaddle and to detect the incoming flow or movement of the existingliquid in the pipe. In static liquid or no liquid, the spring is in expandedand presses the magnet downward. The reed switch is normally open.
As flow occurs and the paddle is raised at an upward angle of 20 to30 degrees (or more), the paddle will push the magnet upward toactuate the reed switch which then closes the circuit.The length of the paddle can be adjusted to the diameter of the pipe.1" trim size can only be used with metal pipes.
The installation is simple. Cut the paddle to desired pipe size. No smallerthan 1" pipes for metal pipes. The FSW-25 is not recommended to beused in 1" plastic pipe (1-1/4 is the minimum for plastic pipes). Beforeinstalling the unit to a tee pipe, be sure to apply tape seal to the screwthen tighten up. The FLOW mark on the screw hexagon must be parallel to the pipeand the ground.
SPECIFICATIONS:
Housing Material: Aluminum Alloy, NEMA 4 (IP65)
Operation Temp.: -30 to 150°C (30 to 300°F)
Paddle Material: SUS304 (Similar to 304 SS)
Operation Pressure: 355 psig
Pressure Drop Allowance: 3 psig
Set Point Tolerance: ±25%
Repeatability Tolerance: ±5%
Contact Capacity: 30 Watts/200 Vdc, SPDT
Max Viscosity: 200 SSU or 43 centistokes
Paddle
Length | Pipe Line Sizes |
| 1" | 1-1/4" | 1-1/2" | 2" | 2-1/2" | 3" |
| Approx Actuation/Deactuation Flow Rates (GPM water) |
| Act. | De-Act | Act. | De-Act | Act. | De-Act | Act. | De-Act | Act. | De-Act | Act. | De-Act |
| 1" | 5 | 4 | 8.5 | 6.5 | 12 | 9 | 17 | 15 | | | | |
| 1-1/4" | | | 6.5 | 4.5 | 9 | 7 | 15 | 12 | 23 | 20 | | |
| 1-1/2" | | | | | 14 | 10 | 23 | 16 | 32 | 25 | | |
| 2" | | | | | | | 18 | 12 | 24 | 17 | 33 | 27 |
| 2-1/2" | | | | | | | | | 20 | 13 | 27 | 22 |
| 4" | | | | | | | | | | | 22 | 16 |
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