How does a degassing valve work?

A degassing valve is a one-way vent that allows coffee beans and ground coffee to slowly release carbon dioxide (CO2) and other volatile gases from the bag, without coming into contact with the air outside. When coffee is roasted, a number of chemical reactions take place.

Does ground coffee need a degassing valve?

A degassing valve prevents oxygen from entering the bag, while at the same time allowing the right gases to escape from roasted coffee. “If the coffee is shipped in smaller pouches, a degassing valve is recommended, but it is not essential,” Laura explains.

Does a coffee bag need a valve?

Coffee beans keep giving out large quantities of carbon dioxide for many hours after they have been roasted. Due to this offgassing process, coffee beans and powder are stored in pouches with valves. This ensures that while carbon dioxide is allowed to escape, oxygen is not allowed to enter.

What is the plastic thing in a coffee bag?

The hole in our coffee bags is a one-way valve that lets carbon dioxide escape from the beans. Some carbon dioxide is released during the roasting process, but a lot remains in coffee beans after they are roasted.

What is air relief valve?

Air Release Valves, or Air Relief Valve function to release air pockets that collect at each high point of a full pressured pipeline. This greater force opens the orifice whenever air pockets collect in the valve. Air Release Valves are essential for pipeline efficiency and water hammer protection.

How do you store coffee beans when degassing?

The simplest is to pop some beans into a resealable plastic bag. Squeeze out all the air and leave the bag overnight. If the bag puffs up, it’s still degassing—no matter how many days off roast you are. With darker roasts, you can tell by looking at your beans.

What is the little valve on coffee bags?

That valve on your bag allows for the carbon dioxide to escape from inside the bag without allowing oxygen to enter the sealed bag. This valve increases flexibility for the roasters and allows us to immediately package the coffee without worry of the bag bursting on the shelf or in transit to the customer.

What is the hole on coffee bags for?

If you’ve ever bought coffee from us, you might have noticed there’s a small hole near the top of the bag. This is actually a one-way valve that lets the beans blow off some steam (well, gas, but you know) and also prevents oxygen, moisture, and light from getting through.

What is the freshness valve on coffee bags?

The coffee bag vent is there to keep your coffee fresh and delicious for as long as possible. That tiny little valve does a fantastic job of lengthening the shelf life of your coffee and preventing it from going stale, but it also stops the coffee bag from bursting!

What is the purpose of air valve?

Air valves are hydromechanical devices designed to automatically release air and wastewater gases or admit air during the filling, draining or operation of liquid piping systems for water and wastewater services.

Where should I put my air valve?

Proper installation is critical to the operation of air release valves. Because these valves are designed to release air from the piping system, they should be placed where the air is most likely to collect. Install them at system high points in the vertical position with the inlet down.

Why do you need one way degassing valve?

What Is One-Way Degassing Valve? One-way degassing valves are designed to allow pressure to be released from air-tight packing-pouch meanwhile preventing air from getting back into the packing-pouch. Air, especially the Oxygen (O2) portion of air, can have negative effects on the package contents and its freshness.

Can you store coffee without a degassing valve?

However, storing coffee without an air-tight seal quickly ruins the beans’ freshness. Enter the coffee packaging valve. Coffee bags with valves offer the best of both worlds. The one-way degassing valves force air without letting air in.

Can a coffee bag be degassed by itself?

When you discuss with your packing pouch vendor, they can not reply with a reasonable answer because the valves was purchased from another supplier. Most of the coffee bag manufacturers can not produce the valves by themselves, because the coffee bag and degassing valve are totally in the two different fields.

Why do you need a coffee bag with a valve?

Valves allow you to package coffee beans immediately after roasting, keeping the beans fresh and extending their shelf life. Do away with tin cans and carton and shift over to flexible coffee bags with valves! With the invention of one-way degassing valve technology, coffee packaging has changed for the better.