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Bag on Valve Machinery

As the EPA tightens rules and regulations on conventional aerosol hydrocarbon propellants, the bag on valve package (BOV) is a growing trend in the aerosol industry.

The bag on valve is just as it sounds: a bag attached to an aerosol valve. A rolled up aluminum bag is welded or attached to the aerosol valve. Compressed air is charged into the can, and an aerosol valve with the bag attached is crimped onto the container. The product is forced through the aerosol valve stem to fill the bag. When the spray button is pressed, the product is squeezed out of the bag by the compressed air which creates the aerosol spray via the spray button orifice. The major benefit of this package is obviously the non VOC aspect. The other benefit is that it is completely recyclable. 99% of the product is squeezed out so the only thing left is aluminum and 30‐ 40 psi of harmless compressed air which makes it the most green aerosol.

The bag on valve uses compressed air instead of a liquid gas (hydrocarbons) to propel the product out of the aerosol can. The bag on valve is a simpler package than conventional aerosol with the exception that it does not require all the production and safety expense associated with conventional aerosol production.

Examples of these expenses would be the gas house, propellant tank farms and in some cases the use of a waterbath to meet DOT regulations. The only limitation to using the bag on valve would be with a product that requires the hydrocarbon to dissolve or thin the product.

Stage 1—UTC Gassing Station

The UTC (under the cup) Gassing Station seals on the container, lifts the BOV out of the container, injects compressed air or nitrogen around the bag, lowers the BOV assembly back down into the container, and then finally crimps the BOV assembly onto the container. The container is then ready for filling through the valve.

Stage 2—TTV Filling Station

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Product is filled via the Sanitary TTV (through the valve) Filling Heads at a 8:1 ration from the Sanitary Filling Pumps. Sunscreens, lotions, oils, and gels are just a few of the common products used in the BOV package.

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Features:

  • Stainless Steel Wash Down Construction Frame w/Polished Top
  • Quick Change Tool‐Less Can Diameter Change Parts (Less than 5 min)
  • Tempered Glass Safety Enclosure
  • Stainless Steel Side Panels
  • Can In‐feed and Discharge Sensors
  • Sanitary 316 Stainless Steel Fill Pumps
  • Pressure Testers

Specifications:

  • Air Supply: 90 PSI 1” NPT

Line Speeds:

  • Semi‐Auto: 10—15 CPM
  • Rotary Index: 25—100 CPM
  • High Speed Rotary: 100—200 CPM