The valve application device can be used especially in the companies involved in production and packaging
of grained and ground coffee – that is goods releasing gases. The valve eliminates buildup of gas in bags, released by the packaged product, which results in damage of bags and deterioration of the product.
Let us have a look, for instance, at packaging ground coffee into bags. Fitting a valve onto the bag allows for packaging ground coffee immediately after completion of the roasting and grinding processes, without the necessity of “venting” it in an in-process store. Also, the valve considerably helps to keep natural aroma
of the packaged coffee as the coffee is surrounded with protective atmosphere in the bag, which it “produced“ itself. The one-way valve enables escape of the coffee-released gas from the bag, while sealing out the air.
The internal tests and follow-up measurements of residual oxygen conducted by the laboratory of a leading Czech coffee producer showed excellent results. The readings were deep below the internal permitted limit values.
The self-adhesive valves (a valve system by a US company Plitek) are supplied in transparent or metalized form on reels containing 6,000 and more pieces, which enables a longer running time between replacements of rolls.
The valve applicator is used as an accessory to the vertical FFS packaging machine HSV101B FLEXIBLE produced by VELTEKO s.r.o. company.
The applicator is situated on the left-hand side of the packaging machine and the valve is fed to the area located immediately above the transversal welding jaws. Therefore, the valve is applied onto the bag that is being filled at the given moment.
The maximum output of the device is 70 cycles/min.