Coffee Roasting Exhaust Systems

There are really three stages to the coffee bean roasting process where ducting is needed to exhaust and extract particulate from the air.

The loading stage. When the beans are loaded into loaders and drums, dust can bloom. Hoods and ducting can be used to capture the dust and prevent it from settling back into the drum.
The initial roasting stage. Heat from the drum, bean hulls/skins, and dust all need to be extracted as exhaust from the 450F degree drum environment.
The cooling stage. As the coffee beans move from the roaster to the cooling tray, both particulates generated during roasting and heat from the drum need to be collected and conveyed through ductwork as exhaust or to a collector for filtering prior to exhaust.

Because types of ductwork needed for these stages of roasting varies, it is important to have a coffee roasting duct system that provides the right combination of versatility, seal and heat tolerance. When ducting is traveling through a building envelope, or near combustibles, single wall ducting may need modifications (shielding or double wall segments). Please consult your authorities having local jurisdiction regarding "clearance to combustibles" and other code requirements.

How Are Coffee Beans Roasted?

Commercial coffee roasters first drop raw coffee beans into loaders, which feed into a rotating drum. The drum is pre-heated to a temperature of around 450 degrees F. After 12-15 minutes, depending on the type of roast, the roasted coffee beans exit the drum at temperatures around 350F degrees and are placed on a cooling tray at the front of the roaster. A special machine removes any stones or debris before someone manually checks for defects. Once cooled completely, the roasted coffee beans are finally packaged for sale.

Benefits Of Using Clamp Together, Rolled-lip Duct For Coffee Roasting

US Duct’s Rolled-Lip Clamp Together System utilizes a rolled edge that is formed on the ends of all parts. The lips are joined together with an over-center clamp containing a sealing gasket. The clamp pulls the ends together and envelopes them inside the sealing gasket. This clamp together system provides a fast install time (70% faster than flange connected ducting) and ease of adjustment. The pipe can be easily disassembled and reassembled for easy cleaning and maintenance. This system is ideal in coffee roasting ducting for the dust and nuance particulate collection required for many coffee roasting applications.

US Tubing As An Option For Coffee Roasting Vent Systems

US Tubing, US Duct’s airtight clamp together system, is guaranteed to be leak-free in both positive and negative pressure applications. Each component terminates in a flat, turned-out lip. A v-shaped gasket fits over the one lip on each joint and then the connection is joined by a stainless-steel, adjustable clamp. When the clamp is tightened, if compresses the ends and gasket to form The Ultimate Seal®. This clamp together system provides a fast install time (50% faster than flange connected ducting) and ease of adjustment. The pipe can be easily disassembled and reassembled for easy cleaning and maintenance. The tighter seal of the US Tubing system is ideal for coffee roasting ducting systems where no leaks are acceptable.

Everything You Need to Know About Clamp Together Duct

Clamp Together Duct has become a go-to ductwork system for many industrial applications, but many are still learning about the benefits of this fast and easy ductwork system. If you're a novice or interested in expanding your knowledge of the system — we've got your back.

From how it works to what applications it works best in, this guide gives you EVERYTHING you need to know about Clamp Together Duct (and some information you probably didn’t want or need).

Equipment Needed for Roasting Coffee Beans