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The FSW-30A flow switch is supplied with six orifices to provide 6 overlapping flow ranges from 0.12 to 8.0 GPM for water. The FSW-31 is supplied with 3 different drag discs to provide 3 overlapping ranges from 6 to 70 GPM for water. The orifices and drag discs can be changed while the switch is in-line, but not while operating. The FSW-32 operates over the range of 4-8 GPM for water.
Relay switch: SPDT 15 A @ 125 or 250 Vac; 10,000,000 operations median
Sensitivity (% flow change required to activate switch): 5% at upper end of flow range, 25% at lower end of flow range
Max. Temperature/Pressure: 300 psig @ 82°C (180°F) max.
Min. Temperature: 4°C (40°F)
Wetted Parts: Red brass, 316 SS, phosphor bronze, Noryl®, EPDM (and PVC for Models FSW-31, 32). Other materials of construction: Brass body, Noryl® cover, stainless steel and plastic hardware
FSW-30A: 1 to 5 psi
FSW-31A, FSW-32A (4 - 8 GPM range): 2 to 15 psi; all other ranges less than 2 psi
Electrical Cable Fitting: Water resistant for cable diameter 0.250' ±0.025'
Option “D” (dual SPDT relays):
Nominal Differential Flow Between the Two Relay Actuation Points: 5%
Dimensions: 1.43 H x 125.5 mm W (5.63 x 4.94')
Weight: 1.59 kg (3.5 lb)
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