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Built for machine-cutting oils and pump control, this flow switch serves a range of applications.
Built for machine-cutting oils and pump control, this flow switch serves a range of applications.
The FSW-40A and FSW-50 Series flow switches feature 15 A SPDT switches and an internal screw adjustment for in-line monitoring of switch points. Multiple drag disks provide incremental switch point adjustment.
Their non-magnetic design makes these switches ideal for applications in which rust is a problem. The FSW-40A Series has a brass and stainless steel construction, while the FSW-50 Series comes in a plastic/316 SS construction.
Features
Applications
| Series | FSW-40A Series |
| Type | flow switch |
| Relay Switch | SPDT 15 A @ 125 or 250 V AC; 10,000,000 operations median |
| Nominal Sensitivity (% Flow Change to Activate Switch) | 10% @ upper end of range; 30% @ lower end of range |
| Minimum Temperature | 40°F (4°C) |
| Electrical Cable Fitting | Water resistant for cable diameters 0.250" (6.4 mm) ±0.025" (0.6 mm) |
| Pressure Drop | 1 to 3" (2.5 to 7.6 cm) pipe, less than 1 psi (0.07 bar); 4" (10.2 cm) and above, negligible |
| Maximum Pressure/Temperature | FSW-40A Series: 300 psig (20.68 bar) @ 180°F (82°C); FSW-50 Series: 100 psig (6.89 bar) @ 200°F (93°C) |
| Wetted Parts | FSW-40 Series: Red brass, 316 SS, phosphor bronze and EPDM and cork rubber (other materials are brass body, Noryl® cover, 316 SS hardware); FSW-50 Series: Polyphenylene sulfide, 316 SS, FKM; also available with polyphenylene sulfide, Hastelloy C and FKM construction |
| Switch Point Adjustment Range | Low 2.0 to 6.0 fps, High 5.0 to 15.0 fps (FSW-40A series); FSW-50 3.3 to 5.3 / 7.4 to 11.5 fps, FSW-51 2.7 to 5.4 / 5.4 to 10.8 fps, FSW-52 2.0 to 4.0 / 4.0 to 8.0 fps |
| Pipe Sizes / Extra Disks | FSW-40A: 1" (2.5 cm), 1 disk; FSW-41A: 1-1/2 to 2-1/2" (3.8 to 6.3 cm), 2 disks; FSW-42A: 3 to 10" (7.6 to 25.4 cm), 3 disks; FSW-43A: 10 to 48" (25.4 to 121.9 cm), 3 disks; FSW-50: 1" (2.5 cm), 1 disk; FSW-51: 1-1/2 to 2-1/2" (3.8 to 6.3 cm), 1 disk; FSW-52: 3 to 10" (7.6 to 25.4 cm), 1 disk |
| Weight | FSW-40A Series: 3.5 lb (1.59 kg); FSW-50 Series:6 oz (179 g) |
| Series | FSW-40A Series |
| Type | flow switch |
| Relay Switch | SPDT 15 A @ 125 or 250 V AC; 10,000,000 operations median |
| Nominal Sensitivity (% Flow Change to Activate Switch) | 10% @ upper end of range; 30% @ lower end of range |
| Minimum Temperature | 40°F (4°C) |
| Electrical Cable Fitting | Water resistant for cable diameters 0.250" (6.4 mm) ±0.025" (0.6 mm) |
| Pressure Drop | 1 to 3" (2.5 to 7.6 cm) pipe, less than 1 psi (0.07 bar); 4" (10.2 cm) and above, negligible |
| Maximum Pressure/Temperature | FSW-40A Series: 300 psig (20.68 bar) @ 180°F (82°C); FSW-50 Series: 100 psig (6.89 bar) @ 200°F (93°C) |
| Wetted Parts | FSW-40 Series: Red brass, 316 SS, phosphor bronze and EPDM and cork rubber (other materials are brass body, Noryl® cover, 316 SS hardware); FSW-50 Series: Polyphenylene sulfide, 316 SS, FKM; also available with polyphenylene sulfide, Hastelloy C and FKM construction |
| Switch Point Adjustment Range | Low 2.0 to 6.0 fps, High 5.0 to 15.0 fps (FSW-40A series); FSW-50 3.3 to 5.3 / 7.4 to 11.5 fps, FSW-51 2.7 to 5.4 / 5.4 to 10.8 fps, FSW-52 2.0 to 4.0 / 4.0 to 8.0 fps |
| Pipe Sizes / Extra Disks | FSW-40A: 1" (2.5 cm), 1 disk; FSW-41A: 1-1/2 to 2-1/2" (3.8 to 6.3 cm), 2 disks; FSW-42A: 3 to 10" (7.6 to 25.4 cm), 3 disks; FSW-43A: 10 to 48" (25.4 to 121.9 cm), 3 disks; FSW-50: 1" (2.5 cm), 1 disk; FSW-51: 1-1/2 to 2-1/2" (3.8 to 6.3 cm), 1 disk; FSW-52: 3 to 10" (7.6 to 25.4 cm), 1 disk |
| Weight | FSW-40A Series: 3.5 lb (1.59 kg); FSW-50 Series:6 oz (179 g) |
