3) The metering pump flow vs. stroke characteristic curve is linear, It is not, however necessarily proportional in that 50% stroke setting may not equal 50% flow. This is due to the fact that the calibration line may not pass through 0 on both axes simultaneously. By measuring flow at 2 stroke settings, plotting both points and drawing a straight line through them, other flow rates vs stroke can be accurately predicted. The steady state accuracy of a correctly installed industrial grade metering pump is generally +/- 1.0% or better.
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Although a metering pump can generally be adjusted to pump at any flow rate between 0 and its maximum capacity, its accuracy is measured over a range determined by the pump&#;s turndown ratio.
Most metering pumps have a turndown ratio of 10:1, which simply means that the pump is within its accuracy rating anywhere between 10% and 100% of capacity. Centrac is an example of a new generation metering pump that features higher accuracy and a greater turndown ratio of 100:1. Therefore, this design will accurately dose anywhere between 1% and 100% of capacity.
The FMI Advantage - Features & Benefits
How Fluid Metering, Inc.'s Metering Pumps and Dispensers can improve your processes:
FMI pioneered the first patented valveless rotating and reciprocating piston metering pump concept and has been providing precise fluid control for over 55 years. FMI dispensers and metering pumps have been utilized in a broad range of laboratory, analytical, industrial process, and OEM applications requiring precision fluid control.
No valves to clog, leak, hang up or service
Service, maintenance free and down time are considerably reduced. Fluid connections and leak possibilities considerably reduced.
Ceramic Internals
Wear and abrasion resistant. Corrosion resistant fluid path. Means Superior material stability will provide millions of service free cycles.
Fully adjustable flow and displacement from zero to 100
RH Pump Adjustment
The "RH" line flow adjustment is accomplished by turning an easy-grip Flow Control Ring graduated in 450 divisions from 0 to 100% flow.
Drift Free Operation Set
The piston is the only moving part in the pump. This unique design enhances reliability and simplifies trouble shooting, service and down time. No tubes to change.
Precision Dispensing
Repetitive dispensing with CV less than or equal to 0.5 %.
Single shot or repetitive dispensing of very low volumes, microliters.
Flows from 0 to ml per minute
Wide range of flows. From microliters to 70 gal/hr. precision of better than o.5% is maintained from one drop dispensing to ml/ min. pumping.
Positive Displacement
Unaffected by back pressure of up to 100 PSI. Will maintain output flow against discharge pressures of up to 100 PSI.
Viscosity Independent
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Unaffected by viscous fluids. As long as the material flows or is pressure fed into the pump, we will pump it out.
Self Priming
Pumps will self prime to 15 feet. The pumps suction stroke will pull a vacuum of 15" Hg dry, 26" Hg wet.
Dimensionally Stable Materials
Materials used will not change or be affected by pressure and most fluids. Ceramics, carbon and stainless steel, provide broad fluid compatibility for dependable long life operation.
Chemical & Corrosion Resistant
Inert and corrosion resistant fluid path. Pump construction materials are versatile and are unaffected by most chemicals. Chemical compatibility must be verified.
Repeatability
Change settings with precision accuracy. Flow setting can be changed and then reproduced within 0.1% of original setting.
Instant Reversibility
Will pump in either direction Reverse pumping direction while the pump is working, without disassembly.
Modular Design
Interchangeable pump head modules and pump drive modules, provide numerous flows and material combinations. Pump drives will accept different size pump heads. Quick modular online change reduces down time to minutes.
Delivery from Stock
No waiting time. We will ship the same day if order is placed before 2 PM.
Large Selection of Pump Drives
AC, DC, air, explosion proof, fixed, stepper or variable drives. We have many standard drives to suit all applications including pedestal models to be used with customers own motor.
Reliability, Innovation, State of the Art Design
Valveless metering pump experts since . FMI pumps are used in the most advanced hi-tech applications and designs. Our pumps are covered by 7 US patents and many foreign patents. They are mentioned and used as part of 78 different patents.
Are you interested in learning more about Ceramic Metering Pump? Contact us today to secure an expert consultation!
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