When specifying a dosing pump for any type of chemical dosing applications there are some fundamental questions that you need to ask yourself.
What is the type of fluid is being pumped?
All materials which come in contact with the fluid must be compatible these include the dosing heads, diaphragms, valve balls, valve seats, piston seals etc.
What is the viscosity of the fluid being pumped?
Pumps that have a slower stroke rate are more suitable than pumps with a fast stroking rate when pumping viscous fluids.
What is the required delivery volume?
The pump should be chosen to deliver the required volume at the actual pressure into which it will be pumping
What pressure will the pump be delivering into?
The pump must obviously be capable of delivering fluid at a greater pressure than is required.
Is the pump operation continuous or intermittent?
Some pumps, especially those with shaded pole motors should be avoided for continuous operation.
Is the pump going to be controlled from an external signal?
This could be from a pulsed digital input or proportional analogue input
Can the output volume be controlled sufficiently for your application?
Some pumps have better control than others particularly at low delivery rates.
What power supply is available?
Pumps can be specified with the many different power supply voltages, the most common are 230v and 110v.
IF YOU ARE BEING ASKED TO QUOTE AN EQUIVALENT PUMP TO ANOTHER MANUFACTURER YOU SHOULD TRY TO GET AS MUCH OF THE FOLLOWING INFORMATION AS YOU CAN.
- Full Product Number or Part Code
- Flow rate
- Pressure
- Materials of construction
- Voltage
