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Metering Pump FAQs

Q: What feed capacities are available in ChemIndustrial’s product line?
A: Each injection line can be:

  • 0 – 15 gallons per hour
  • 0 – 60 gallons per hour
  • 0 – 160 gallons per hour
  • 0 – 400 gallons per hour

Q: Are lower-capacity injection lines more accurate?
A: Yes. Injection rate can be accurately metered to a percentage of an injection line’s maximum flow rate.

Q: How many separate injection lines are available on a single metering pump?
A: Standard multiflow pumps are available for 1, 2, 3 or 4 injection lines.

Q: On multiflow pumps, do all of the lines need to inject the same fluid?
A: No. Each line can either be the same or different from the others.

Q: On multiflow pumps, do all of the lines need to be the same capacity?
A: No. Line capacities can be mixed and matched for maximum flexibility. 

Q: What happens when a customer needs more than 4 injection lines?
A: Usually the answer is to use two or more pump units.

Q: What is the capacity range of ChemIndustrial’s metering pump models?
A: The smallest standard model is a single line 0 to 15 gph injector. The largest standard model is a 0 to 1600 gph multiflow injector with 4 lines, each able to deliver 0 to 400 gph.

Specials are available to satisfy even higher capacity requirements. 

Q: Wow! You must have lots of standard models.
A: Yes. Our most popular models are in stock ready to ship. Other models are usually quickly assembled from in-stock subassemblies.

Q: What control options are available?

  • Interface to owner’s automation
  • On-board timers
  • On-board computer
  • Networked automation to coordinate several systems
  • Central control station to operate a multi-system installation
  • Link to customer’s computer for recipe handling and record keeping
  • …or of course we can provide completely manual systems

Q: What about chemical tanks?
A: ChemIndustrial offers a wide range of polyethylene storage tanks, holding tanks, surge tanks and day tanks to supply liquids to and receive the metered output from metering pump systems. We also offer mix tanks.

Q: What other metering pump goodies does ChemIndustrial make?

  • Trailer-mounted chemical feed systems
  • Portable metering pumps with hand truck wheels
  • Timer-based chemical feed systems
  • Proportional (flow-following) metering pumps

Q: What are the differences between metering pump systems and blending/batching systems?
A: In general, the differences are…

  • blending and batching systems are made up of several individual ChemIndustrial metering pumps linked by a Programmable Logic Controller (PLC) control system.
  • most metering pump systems involve a single metered stream whereas blending/batching systems usually involve multiple metered streams.
  • multiple stream metering pump systems don’t necessarily require any interaction among the streams. Blending/batching always involves a significant amount of interaction among several streams.

Q: Are there any applications where CSI’s pumped venturi injectors WON’T work well?
A: Yes. There are a few situations: 

  • Dirty fluids: Heavy suspended solids loadings in the motive fluid can plug clearances in the pump or venturis and cause rapid wear on the centrifugal pump. ChemIndustrial can provide strainers, filters or hydroclones to remove solids, if this is appropriate for the whole process.
  • Very high pipeline pressure: Our standard systems generally inject into pressures at or below 100 psi; special configurations can work with line pressures up to 150 psi – check with a ChemIndustrial engineer for pressure specs of specific models if you have a line pressure near these limits.