Dual Release

The signature version of Uvasys is the Dual Release product that has both a Fast Release and a Slow Release layer. The Fast Release sterilizes table grapes, by releasing a large enough dose of sulphur dioxide over a 24 to 48 hour period to kill and eliminate any actively growing Botrytis cinerea fungal spores. The Slow Release layer remains active for up to 120 days, emitting a low, continual dose of sulphur dioxide gas, concentrated enough to inhibit any latent or inherentBotrytis cinerea spores from growing, but also low enough to ensure sulphite residues within the table grapes remain safely below the legal limit of 10 ppm.

The product is available in many different sizes, depending on the carton sizes used:

  • CARTON SIZE(mm)

  • SHEET SIZE(mm)

  • DESCRIPTION

  • PACK SIZE (units)

  • 400 x 300

  • 356 x 260

  • Dual Release 4.5 kg

  • 1000

  • 500 x 300

  • 460 x 260

  • Dual Release 7.2 kg

  • 500

  • 500 x 400

  • 460 x 350

  • Dual Release 8.0 kg

  • 500

  • 600 x 400

  • 530 x 350

  • Dual Release 9.0 kg

  • 500


Uvasys Dual Release Blue

We have recognized the need for a sulphur dioxide generator with a reduced fast release application to be used under certain conditions. We therefore have Uvasys Dual Release Blue available for use in all sizes. It is easily recognizable due to its blue print. Please contact us at info@uvasys.co.za to learn more.


Slow Release

A specialized version of Uvasys is the Slow Release product that has only a Slow Release layer. This product is designed to be used in packing facilities that use sulphur dioxide gas or dosing chambers to treat and sterilize table grapes, by releasing a large enough dose of sulphur dioxide over a very short exposure time to kill and eliminate any actively growing Botrytis cinerea fungal spores. The Uvasys Slow Release sheet remains active for up to 120 days, emitting a low, continual dose of sulphur dioxide gas, concentrated enough to inhibit any latent or inherent Botrytis cinerea spores from growing, but also low enough to ensure sulphite residues within the table grapes remain safely below the legal limit of 10 ppm.

The product is available in many different sizes, depending on the carton sizes used:

  • CARTON SIZE(mm)

  • SHEET SIZE(mm)

  • DESCRIPTION

  • PACK SIZE (units)

  • 400 x 300

  • 356 x 260

  • Slow Release

  • 1000

  • 600 x 400

  • 530 x 350

  • Slow Release

  • 500

  • 500 x 400

  • 460 x 350

  • Slow Release

  • 500


Uvasys Pak

Uvasys Pak is a combination Uvasys sheet and liner bag product that is designed to suit the needs of table grape growers, packers, exporters and importers who prefer to streamline their packing operations. It offers the same technical advantages as Uvasys whilst also combining it with a sturdy liner bag, perfectly perforated and with an easy to use tear-off section. Different permutations of Uvasys products and liner bag sizes as well as aeration/perforation are available, ensuring that Uvasys Pak always suits the need of every client.

Please contact us at info@uvasys.co.za to order or learn more.

If another size is preferred other than these listed in the above table, please contact us at info@uvasys.co.za