Chemical Metering Pumps

ChemIndustrial metering pumps

Pumped venturi injection for liquid chemical dosing

ChemIndustrial uses a centrifugal pump to drive a side stream of liquid (the "motive liquid") from a flowing pipeline (or a vessel) through one or several parallel high-efficiency venturis.

As the motive liquid passes through each venturi it generates vacuum that sucks the injected fluid (the "injectate") into the motive liquid. The venturi thoroughly mixes the motive and injectate liquids before they return to the pipeline or vessel.

The injectate can be a liquid or a gas.

ChemIndustrial applies proprietary system design techniques to arrange the motive and injectate flows to accomplish accurate injection rates over a very wide range of process conditions. We apply proprietary control techniques to satisfy customer automation requirements

Low maintenance, high accuracy

With only one moving part (a smooth-spinning centrifugal pump impeller), pumped venturi injection offers important benefits over reciprocating techniques like piston pumps and diaphragm pumps. See all the advantages here.

Metering and rate adjustment are easily done in real time, with direct indicating flowmeters showing the exact injection rate. No calibration procedure is necessary!

The smooth-running centrifugal pump is inherently less failure-prone than piston or diaphragm pumps. The simplicity of pumped venturi metering means a ChemIndustrial pump will continue performing long after other pumps are consigned to the breakdown bin.

ChemIndustrial pumped venturi metering pumps are competitive in initial cost with piston and diaphragm pumps for similar service and they enjoy significant price advantages in high capacity, medium pressure metering applications. They are usually more economical than peristaltic pumps, gear pumps and lobe pumps of similar capacities.

Nothing else to buy

Even our basic metering pump models come preassembled, fully equipped and ready to run, including:

  • Centrifugal pump and venturi(s)
  • Direct-indicating flowmeters
  • Intuitive, real-time injection rate controls
  • Protective strainers
  • Check valves
  • Motive liquid and injectate connections
  • Protective stainless steel frame

With smooth-running ChemIndustrial metering pumps, there's no need for pulsation dampers, calibration kits, injection quills, injectate priming bleed valves or other extras.

Industries served

ChemIndustrial builds versatile liquid chemical dosing systems to precisely inject liquids in most industrial, process and wastewater applications.

160EH metering pump

Model 160EH: corrosion resistant single stream metering pump for injecting up to 160 gallons per hour of chemical into line pressures up to 125 psi.
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15/15/15/15E3 metering pump

Model 15/15/15/15E3: inject 1 to 4 chemicals simultaneously with a ChemIndustrial multiflow metering pump. Each line's injection rate is separately adjustable from 0 to 15gph.
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400G metering pump

Model 400G: 400 gallon per hour chemical feed system powered by a Honda engine
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Corrosion-resistant materials of construction

ChemIndustrial metering pumps inject a very wide range of chemicals, including:

Standard chemical contact materials include polypropylene, VitonŽ and TeflonŽ. Durable construction ensures low maintenance and dependable operation.

Other material options are used in some petrochemical, solvent and highly aggressive applications – check with a ChemIndustrial engineer for material options.

Special metering pump applications

ChemIndustrial provides alternatives for special applications when a standard pumped venturi metering pump is not applicable.

Custom systems

ChemIndustrial's custom systems expand on the capabilities of our standard metering systems. If you have an unusual metering requirement contact a ChemIndustrial engineer to determine whether a ChemIndustrial custom control system will be right for your process.

Frequently Asked Questions

Visit the Metering Pumps FAQs for additional information about ChemIndustrial metering pumps.

For more information on metering pumps...

If you're considering a metering pump, complete the Chemical Metering System Questionnaire [pdf] and fax it to ChemIndustrial. We'll review it and contact you with information on the appropriate system.

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