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Flow

Flow
Dwyer's flow products included in this category are compact and explosion-proof. They monitor liquid, gas, and air flows. Some applications are control dampers according to flow, signals alarm, shuts down burner, and protects pumps, motors, and other equipment against low or no flow.
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  1. SERIES V6 FLOTECT® MINI-SIZE FLOW SWITCH
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    FLOTECT® Mini-Size Flow Switches are compact and designed to monitor ...
    Starting at $245.60
  2. SERIES V4 FLOTECT® VANE-OPERATED FLOW SWITCH
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    ...
    Starting at $569.75
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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
What material is used as a seal between the process fluid and the electrical portion of the switch?
Answer
The body material; as there is no separate "seal" since the body is machined from solid stock and the switch is magnetically actuated.
Question
What is the pressure drop across a V6 Flow switch?
Answer
Pressure drop (head loss) is a function of both set point and flow rate. Typically, pressure drop at actuation flow rate listed will be 5 – 10 PSID (0.34 – 0.69 Bar). Pressure drops at other flow rates will vary in proportion to the change in flow.
Question
Are custom vanes for the V6 available?
Answer
Yes, we can supply customer vanes for the V6. The information we would require is as follows: pipe size, flow direction (horizontal, up, down), mounting, pressure, temperature, specific gravity, flow rates (maximum normal, actuation/de-actuation). Please see custom vane option in the online configurator.
Question
Why should a customer be discouraged from buying a V6 without a tee and installing it in his own tees?
Answer
Two reasons: One, the customer will frequently tighten the body in the tee one turn too many, resulting in the vane hitting the tee. This bends the vane and it can jam up even after the switch is backed out one turn to its proper position. Two, there is also a wide variation in tee dimensions between manufacturers which aggravates the problem.