Wed, 21 Feb 2024
22.7 C

A quick guide to foamed chemicals in high-pressure pumping equipment

Home Engineering Chemical A quick guide to foamed chemicals in high-pressure pumping equipment

Foamed chemicals are used for various applications and industries where high-pressure pumping equipment is employed.

Most commonly, foam allows chemicals to cling to certain surfaces, giving them longer contact time with the material.

This helps the chemicals do a better job. A leading manufacturer of high-pressure washers, Hawk Pumps, provides a more detailed breakdown on foaming in high-pressure cleaning.

Typically, foam is used:

  • To sterilise equipment, conveyors, walls and floors in food and beverage factories and abattoirs.
  • To sterilise poultry houses, to ward off a range of diseases.
  • As a degreasing agent in carwashes.
  • As a degreasing agent for heavy equipment – typically when cleaning before maintenance.

A quick tip on achieving the most effective foam: The chemical must contain a strong surfactant (foaming agent) and a lot of air has to be entrained.

Four chemical foaming methods:

  • A foaming bottle on the end of the gun lance
  • The chemical is picked up and mixed with the water jet using a container fitted to the foamer with a venturi. As this mixture sprays from the unit, it draws air from a secondary venturi effect. This creates a good but slightly wet foam. This method can be used instead of other equipment like compressors and allows for a controlled volume of chemicals per application.
  • A chemical injector is fitted to the outlet of the pump, before the hose
  • When a mixture sprays from the gun it goes through a foaming lance, which sucks in the air. This can provide a variable thickness of foam as the chemical injector has an adjustable inlet valve. This works well in chicken houses, where even the ceiling needs to be sterilised.

A wall-mounted foamer unit

This is fed with tap pressure water into a chemical injector, which is then aerated from a compressor feeding a length of 20mm hose. This foam is thick, and this method is popular among carwash companies.

Pot foamers

A mobile stainless-steel tank containing premixed water/chemicals with a hose and gun is fed by a compressor. This method is suitable for most applications and uses less compressed air than the wall-mounted foamer.

Most Popular

SPONSORED NEWS: SA mine gets the world’s first planetary gearbox customisation from Sew-Eurodrive

WHEN a mining operation in South Africa found that one of its planetary gearboxes on a high-torque conveyor was failing, it called Sew-Eurodrive for...

Competition Commission sets its sights on SA poultry value chain

THE Competition Commission announced on Friday, February 9 that it will conduct a market inquiry into the poultry industry value chain as it said...

SONA highlighted the need to bridge the digital divide for youth dividends in South Africa

CHIETA, the Chemical Industries Training and Education Authority, welcomes the call to action in the State of the Nation Address (SONA) to continue empowering...

Citrus exports stand to benefit from a new shipping option

THE Citrus Growers Association of Southern Africa (CGA) welcomes the announcement that a leading international shipping line, Hapag-Lloyd, will be offering citrus export services...