Bluestarcoffee.eu has a choice of over 120 portafilter group gaskets to choose from. Choose Silicon or Rubber, conic, or round group gaskets for home or commercial use.
We recommend that the group gasket change every 9 months for commercial - see below for more.
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Espresso group portafilter gaskets are used to make the seal when you screw on your portafilter, when they age they go hard and brittle and end up leaking from the portafilter. If portafilter group gaskets are not changed frequently the rubber goes hard and can be very hard to remove. Typically when you try to remove the aged group gasket, it will come apart in pieces and small fragments will remain stuck in the group. Care must be taken to ensure these small fragments are removed otherwise the portafilter will be very hard to screw on.
A good practice is to change the group gasket every 6/9 months in a commercial environment and once a year for home use. You won't regret changing the gasket too frequently but you will if not changed in time. Old gaskets cause loss of pressure and loss of coffee cream during extraction. If coffee is dripping from the group during extraction - then the gasket has gone hard and needs to be replaced.
They are a vast improvement on the traditional gaskets that come preinstalled on coffee machines.
BlueStarCoffee.eu carries most gaskets for most home and commercial coffee machines including Ascaso, Astoria, Bezzera, Breville, Brasilia, Conti, Cimbali, Delonghi, Gaggia, Lelit, Rancilio, Reneka, Fracino, CMA, Sage, Wega and more.
The difference between silicone and rubber is that most of the rubbers contain polymer chains of carbon, however, silicone rubbers contain silicon in polymer chains instead of carbon.
Silicone is a Plastic Polymer, although it may be referred to as synthetic rubber. However, it's slightly more complicated than that. Silicone, often known as polysiloxane, is a polymer composed of siloxane. Colorless oils or rubber-like compounds are the most common.
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