Diaphragm pumps & Flow-monitoring
Diaphragm pumps & Flow-monitoring
(OP)
Hello -
I am wondering about the necessity to include a Flowmeter in a pump skid I am developing.
System:
Fluid at room temp., Pressure inlet = 10ft of suction head (varies), Discharges Pressure = 50psig, viscosity = 10-40cP.
Specific pump:
Grundfos DME 60-10. (60 Lph, 10bar max. discharge).
Dosing (i.e. knowing how much chemical) is important, for reporting and quality.
My understanding:
1. With proper calibration, Diaphragm pumps can be self-metering by monitoring the strokes.
2. Diaphragms wear out, and leak-by can occur, thus the need for regular calibration.
3. Discharge volume can vary with varying suction head (possibly related to Item 2)
My questions:
1. Would you always include a flowmeter for the above diaphragm pump application?
Also, the users of this equipment notoriously will not calibrate the pumps. Thus, I feel a flowmeter is the most immediate remedy for this issue. Atleast remotely I can compare dose-strokes to the flow meter.
Thanks -
I am wondering about the necessity to include a Flowmeter in a pump skid I am developing.
System:
Fluid at room temp., Pressure inlet = 10ft of suction head (varies), Discharges Pressure = 50psig, viscosity = 10-40cP.
Specific pump:
Grundfos DME 60-10. (60 Lph, 10bar max. discharge).
Dosing (i.e. knowing how much chemical) is important, for reporting and quality.
My understanding:
1. With proper calibration, Diaphragm pumps can be self-metering by monitoring the strokes.
2. Diaphragms wear out, and leak-by can occur, thus the need for regular calibration.
3. Discharge volume can vary with varying suction head (possibly related to Item 2)
My questions:
1. Would you always include a flowmeter for the above diaphragm pump application?
Also, the users of this equipment notoriously will not calibrate the pumps. Thus, I feel a flowmeter is the most immediate remedy for this issue. Atleast remotely I can compare dose-strokes to the flow meter.
Thanks -





RE: Diaphragm pumps & Flow-monitoring
RE: Diaphragm pumps & Flow-monitoring
RE: Diaphragm pumps & Flow-monitoring
I believe a flowmeter will make it into my specification.
Thanks -
RE: Diaphragm pumps & Flow-monitoring
For this type of application, your flowmeter probably should be a PD type device as well to avoid errors due to any pulsing flow.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way