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