Paddle
Paddle flow switches or vane sensors with an electrical contact output are at a specific flow rate. Dwyer flow switches are economical and reliable. Applications include proof of boiler flow, air conditioning, controlling of dampers according to flow, and protecting pumps, motors and other equipment against low or no flow.
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Series V8 Flotect® Vane Operated Flow SwitchStarting at $108.35 -
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Series V4 Flotect® Vane Operated Flow SwitchStarting at $660.95 -
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Series V6 Flotect® Mini-Size Flow SwitchesFLOTECT® Mini-Size Flow Switches are compact and designed to monitor ...Starting at $283.80 -
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Series FS-2 Vane Flow SwitchVane Flow Switch is an economical flow proving solution. Adjustable to ...Starting at $75.35 -
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Series V7 Flotect® Vane Operated Flow SwitchStarting at $128.95
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Questions
- Question
- What precautions should be taken when making an outdoor installation?
- Answer
- Keep the junction box above the nearest low point in the conduit run and make sure the conduit connection is sealed to prevent condensation from running into the switch.
- Question
- Why is the method of mounting a V4 of concern?
- Answer
- The vane and magnet keeper assembly near the hinge pin are very close to the mounting threads. Combined with the fact that pipe fittings are available in many variations, this produces a possibility that the customer will mount the switch in a fitting that prevents the vane from swinging. To make things worse, there is usually no way the customer can tell that this has happened. Mounting in a threaded branch connection avoids this clearance problem.
- Question
- How is "deadband" defined as related to the V4 switch?
- Answer
- Deadband is the difference between the switch actuation flow and switch deactuation flow; in general, V4 flow switches have a 45% deadband meaning deactuation occurs at approximately 55% of actuation flow.
- Question
- Can a V4 switch be installed in a vertical run of pipe?
- Answer
- Yes, but not the standard model. Vertical pipe installations must be specified on the order and require a special spring loaded vane. Only for use in vertical up-flow applications. Please see option -V in online configurator.
- Question
- What precautions should be taken when installing a V4 switch in an extremely high flow application?
- Answer
- Installation with a 2 1/2" threaded branch connection is recommended to allow the vane to swing out almost parallel to the flow to reduce stress on the vane and pressure drop in the system.
