Trim-to-size Paddle Type Switches for ‘flow/no Flow’ Detection for Piping Systems 1¼" and Up |
| FSW-21 and FSW-22 |
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FSW-20 series paddle-type switches easily install into pipes
ranging in size from 1¼" on up using an ordinary pipe tee
or threaded weld coupling. The paddle pivots to move out of the
liquid’s path with increasing flow, thereby activating the switch.
The paddle is easily cut for field installation for desired flow
setting. Models FSW-21 and FSW-22 feature high pressure
(2000 psig max.) and high temperature (to 150°C
(300°F)) ratings for rugged installations.
SPECIFICATIONS:
Materials:
Housing: Brass, FSW-21; 316 SS: FSW-22
Paddle: 302 SS
Other Wetted: PTFE, ceramic
Body Length: 86 mm (3.4")
Paddle Length: 140 mm (5.5")
Paddle Width: 25 mm (1")
Operating Temperature: -34.4°C to 148.9°C (-30°F to 300°F)
Max Pressure: 2000 psig
Pressure Drop: 3 psig
Repeatability: ±5%
Set Point Accuracy: ±25%
NOTE: 22 mm (0.9") max. height boss from Pipe or Tee O.D. for full paddle swing
Switch: SPDT, 20 VA
Lead Wires: 18 AWG, 0.6 m (2') long, Polymeric
Max Viscosity: 200 SSU or 43 centistokes
Paddle
Length |
Pipe Line Sizes |
| 1-1/4" |
1-1/2" |
2" |
2-1/2" |
3" |
4" |
| 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 |
| 1-1/4" |
5 |
3 |
13 |
8 |
22 |
15 |
29 |
22 |
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| 1-1/2" |
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15 |
11 |
28 |
21 |
38 |
30 |
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| 2" |
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22 |
15 |
27 |
20 |
48 |
38 |
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| 2-1/2" |
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21 |
14 |
40 |
26 |
52 |
39 |
| 3" |
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31 |
20 |
45 |
32 |
| 4" |
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39 |
25 |
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† All dollar amounts on this site are shown in US currency.
Note: Comes complete with operator's manual.
Ordering Example: (1) FSW-21 Flowswitch, Brass Housing and 302SS Paddle with PTFE and Ceramic wetted parts, $210.00
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Related Links -
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