Process / Chemical Metering

Metering Pumps are to Chemicals, as Needles are to Medicine

Chemicals make up a “top-3” expense for any plant, and their value to the process is invaluable because chemicals provide the life-blood for industrial and municipal plants. Metering pumps play a key role in dosing chemicals (that are often procured and stored in high concentrations). Although a metering pump is far less expensive than the material it handles – it must accurately deliver precise volumes every time – to ensure proper results for the process.

Pulsafeeder pumps are the preferred choice for metering chemicals in industrial & municipal plants. The most common chemicals pumped include:


  • Sodium Silicate (for pulp & paper production)
  • Ethylene Glycols (for manufacturing plastics, textiles, latex paints, adhesives)
  • Vinyl Methyl Ether and Vinyl Monomers
  • Nitrate, Ammonium, Urea, Phosphate and Potassium (for fertigation/fertilizers)
  • Methanol (MTBE production for petroleum refining and solvent production)
  • Hydrochloric Acid (hundreds of uses including PVC production and metal refining)
  • Triethylaluminum/TEAL (for manufacturing of plastics, common co-catalyst in olefin polymerization)

PH Control:

  • Sulfuric Acid – to lower pH
  • Caustic Soda (sodium hydroxide) – to raise pH
  • Sodium Bisulfite – for dechlorinating applications
  • Lime Slurries – for water softening


  • Sodium hypochlorite
  • Calcium hypochlorite
  • Hydrogen Peroxide
  • Bromine (in cooling tower applications)
  • Copper Sulfate (for algae control in cooling tower applications)
  • Ammonium Sulfate or aqua ammonia (for chloramines/secondary disinfection)

Coagulation & Flocculation:

  • Alum or sodium aluminate
  • Ferric chloride
  • Proprietary Polymers (provided by water doctors)

Taste and Odor Control:

  • Activated Carbon Slurries
  • Diatomaceous Slurries (wet and dry applications)
  • Fluoride compounds

Heavy Metal Removal:

  • Potassium Permanganate (for manganese & iron removal)
  • Phosphate (for redwater control)
  • Hydrochloric Acid (for numerous applications)

Metering pumps used to deliver chemicals should be selected by criteria specific to the process, such as:

  • Flow Rates & Pressure – as required by the process
  • Corrosion resistance - to the chemical being pumped
  • Accuracy – to deliver precisely the amount of chemical needed for a process
  • Reliability – to ensure sustained and predictable operation
  • Simplified maintenance – to minimize costs and maximize plant uptime
  • Safety – to protect plant employees, and the surrounding environment
This criterion helps to determine whether a diaphragm pump or a rotary gear pump is the best choice for a specific application.

More Resources:

PulsaPro Diaphragm Pump

Pulsa Series Diaphragm Pumps

Eclipse Non-Metallic Rotary Gear Pump

Isochem Series Pump

EcoSeries Pumps for Transfer or Metering Applications