PulseGuard Ltd. and Inc.
PulseGuard Ltd. offers pulsation dampers | Please phone 44(0) 161-480-9625
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Fluid Flow Control Animations
Fluid Flow Control Animations

LEAST EXPENSIVE, the plus corrosion resistance
of plastics, low pressure FLOW METER

paddle wheel action picture
(Write this 2% down for your use in your size calculation).

When you browsed you local marina chandlers store, you have seen these meters in their simplest form. They are made to protrude through the hull of a boat and indicate how many knots it is going!

Normally these flow meters are an injection molded / moulded cross shape for the paddle, with a small magnet encapsulated inside the end of one of the four paddle blades. The paddle is usually installed in an injection-molded housing. The housing has a sensor or proximity switch sealed in glass, set in to the housing. When the paddle blade passes the sensor, a signal is sent to some form of counter or display. The rate of signals is calibrated to a flow rate.

The light weight of the paddle, is the cause of it to having very little momentum. Therefor, instantly the flow varies, the paddle's speed of rotation changes. The smallest of pressure shocks can accelerate the paddle.
It is generally necessary to stabilize flow and to intercept shocks when deploying these low cost meters. When paddle meters are used with diaphragm type dosing pumps, an advisable damper size is 50 times the volume of one pump diaphragm displacement. This will convert erratic jerking of the paddle into constant rotation.


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PulseGuard Ltd. and Inc. Pulsation Dampeners

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Selecting Pulsation Dampeners for Different Pump Systems.
Flow through pulsation dampers are at least 3 times more efficient than T off line accumulators.
Dampeners that do, flow goes through, but pressure pulsation does not.
PulseGuard Pulsation DampersThe Smooth Flow People

Call Toll Free 1-888-DAMPERS (326-7377) / See also: Pulsation-Dampeners.com for a pulsation dampener.

Fluid Flow Control Fluid-Flow-Control.com The Fluid Flow Control Source Pumps Accumulators Filters Dampers Heat Exchangers Valves Mixers P.I. / Pressure Indicators Controls Meters Vessels