26 Jul 2016
Which one way degassing valve is with good quality? A number of people are worried about the quality of one-way degassing valve they buy. There're some factors of one-way degassing valve you should pay attention to.
1. The structure of one-way degassing valve:
polythene base, rubber disk, adhesive(sealing oil), bottom cap, filter(fit for powder). Take the valve apart to see if there's any material missing.
2. The glossiness and transparency of PE material(raw material):
The higher the glossiness and transparency are, the purer the PE material is.
3. Look at the deviation of the diameter of one-way degassing valve:
One-way degassing valve is circular, you can observe the diameter of one-way degassing valve carefully if it is perfect-shaped or out of shape.
4. Have a test with coffee beans:
You can have a test with coffee beans by yourself. Pack the coffee beans in different coffee bags sealed with different one-way degassing valve, tasting them each month. Observing the states of the coffee in the process of brewing. If there's a large amount of dense foam, the coffee beans is under a good conservation. Otherwise, the coffee goes bad if it tastes strongly acid.
5. Have a test with fermented feeds:
Pack the fermented feeds into the PE bags for fermented feeds that are sealed with various one-way degassing valves, observing that which one will referment and make the feeds become moldy.
Do you understand how to identify the quality of one-way degassing valve now? As a real coffee lover, be cautious to purchase sleazy one-way degassing valve because of low prices. Only if the one-way degassing valve is up to the standard, does it work at venting. A good-quality valve will be shoddy if you don't attach importance to it.one way degassing valve
Originally published 26 Jul 2016, updated 26 Jul 2016.
Remember to seal the packaging bag after taking some coffee out, so the one-way degassing valve would finish its job to keep the freshness of product.03 Jul 2020
Roasted coffee cannot be put directly into a sealed package, because the coffee need to "breathe", that is, the carbon dioxide gas will be released.26 Jun 2020
This is a hole punched before installing the degassing valve, which purpose is to discharge the CO2 released and avoid the oxidation of coffee.