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Firewood Commercial Roaster
Ghibli R15 Firewood
3-15Kg batch capacity
Commercial Roaster Ghibli R15
Ghibli R15
3-15Kg batch capacity
Commercial Roaster Ghibli R30
Ghibli R30
7-30Kg batch capacity
Commercial Roaster Ghibli R60
Ghibli R60
20-60Kg batch capacity
Commercial Roaster Ghibli R90
Ghibli R90
30-90Kg batch capacity
Solar Eco Shop Roaster
Solar Eco
2kg batch capacity
Shop Roaster FZ94 Evo
FZ94 Evo
0.1-2.4Kg batch capacity
Shop Roaster Silon ZR7
Silon ZR7
1-7Kg batch capacity
Smoke Trapping System
Avirnaki
Smoke Free Filter
Silon ZR7 Cocoa
1-7Kg batch capacity
Coffee-Tech Engineering - Advanced Commercial Coffee Roasters
FZ94 Evo Cocoa
0.5-2.4Kg batch capacity
Ghibli R15 Cocoa
3-15Kg batch capacity
Shop Roaster FZ94 Evo
FZ94 Evo
0.1-2.4Kg batch capacity
Smoke Trapping System
Avirnaki
Smoke Free Filter
Smoke Trapping System
Avirnaki
Smoke Free Filter
Afterburner
Direct fired thermal oxidizer
Industrial Afterburner
Direct fired thermal oxidizer
Commercial Avirnaki
Commercial Smoke Free Filter
  • Silon ZR7 Cocoa Roaster
  • FZ94 Evo Cocoa Roaster
  • Ghibli R15 Cocoa Roaster

Silon ZR7 Cocoa Roaster

Silon ZR7 7 kg Cocoa Roaster
Silon ZR7 Cocoa Roaster
silon
Silon ZR7 Cooling Group
Integral destoner Silon ZR7
Integral destoner Silon ZR7
Sillon ZR7 Shop Roaster Rear View
measurements-silon
‹ ›
The Silon ZR7, 7kg batch cocoa roaster is a work of art.
This time, we dedicate our work to you, the chocolate artisan.
Silon means ‘jet’ in Hebrew.

Silon ZR7 was originally researched and designed as a tool for artisans who craft their own beans, batch by batch, to be served with great professional pride. We envisioned Silon ZR7 for those who deserve the best tool out there. We present you with a roasting machine built to the highest standard in every possible respect: quality of design all around, quality of build, quality of cocoa produced. We crafted Silon ZR7 to be the crown jewel of your roasting practice, right at the center of your atelier.

Silon ZR7 is much more than your everyday cocoa roaster. Loyal to our endless pursuit of excellence, Silon ZR7 was created, from start to finish, using our long-standing experience in designing state-of-the-art roasting.

As a tool made for pros, we deliver conductive heat, this time, even closer to the beans, more than we ever dared to do with any of our previous commercial roasting machines. We feel certain we can grant all due credit to you, the true artisan we aim at. We count on you, the craftsman, so we removed all built-in limitations that are sometimes deemed necessary when considering a commercial-scale machine.

We believe we understand your goals. You work hard to keep your business reputation at the top of the scale. You strive to understand the effect each parameter has on the roasting process. You wish to maximize output from each batch of precious beans. When it comes to roasting, just like with driving, you want to go all the way through without ABS. You want to take it right to the edge, very close, but never too far. This means you need to take charge, to stay fully on top of things. We know you will, because the process will keep you thrilled to explore.

These have been our guiding principles in optimizing crucial parameters:

  • Advanced Thermodynamic Characterization: A tightly sealed and controlled ceramic combustion chamber design inspired by our extensive research into conductive and convective heat pathways.
  • Robust and Accurate Drum Housing: Ensuring perfect alignment of drum spin throughout the product’s entire life cycle. Greased hemispherical bearings, zero-tolerance precision dry-slide bearings, and a micro metric mechanism to adjust drum gap ensure the edge of the drum stays perfectly perpendicular to the front plate of the machine at minimal tolerance.
  • Drum Proportion: Optimizing ratio of bean mass to metal contact area for a superb conductive thermal dialog.
  • In-drum Variable Agitation: Designed for perfect bean stirring, greater heat conduction between metal and beans, effective chaff separation, and immediate evacuation of beans from the drum into the cooling group.
  • Monitoring and Control: Monitoring of drum air and bean temperature. Digital control of drum revolution speed, drum blower speed, drum aspiration rate, and the fully modulated pre-mix turbo gas burner.
  • Software (optional): State-of-the-art Israeli roasting management software.
  • Perfect Heat Dispersion: A sophisticated heat dispersion scheme involves thermal flow emanating from the heat source located at the bottom towards the top of the structure using secondary airflow propelled by well-calculated jets of air. Specifically designed perforation at the top front end of the combustion chamber allows air to flow in in precise ratio.
  • Fully Modulated Pre-Mix Gas Turbo Burner: Burner is fully controllable from low power to overkill with high frequency of infrared reflection towards the drum. Ultra low NOx specs, most efficient energy production. No soot accumulation in the drum or harmful CO emission.

A New Generation of Roasting Drums
An extensive, in-depth research and development process has resulted in four distinctive tailor-made drum models for the Silon ZR7 line:

  • Silon ZR7 Cocoa Drum
    Cocoa roasters have a dedicated internal design for cocoa, this includes the specifically engineered cocoa drum. All while keeping the original external dimensions and form of our popular, award winning Silon ZR7 Coffee Roaster.
  • Silon ZR7 T4 Drum
    This solid steel coffee roasting drum was designed to produce an extensive aromatic range and high sugar levels during roasting with a higher degree of safe but daring heat conduction. This results in a superb roast for most coffee styles, including blends roasted for espresso.
  • Silon ZR7 Infrared Drum
    This drum is designed to produce a stronger taste with higher levels of caramelized sugars and excels in rapid roasting times while roasting coffee. Two separate layers of perforated mild steel, the inner one promoting an improved grip of the beans, ensure advanced agitation and a larger contact surface area between the beans and the heating source. High frequency infrared radiation emanating from the advanced pre-mix turbo gas burner is applied to the beans via the perforated layers.
  • Silon ZR7 Thermodynamic Drum
    This is the most advanced coffee roasting drum available in today’s industry. Built from two layers of mild steel with a middle layer of pure copper, it has extremely high thermal absorption and heat conduction characteristics. In contrast to standard drums in which roasting is performed by direct, limited contact between the beans and the drum, the Silon ZR7 Thermodynamic Drum exhibits a unique scheme of sophisticated heat conduction applied to a wider contact surface between beans and drum. Heat is transferred via the copper layer creating a 1.4 mm gap between the heat and the beans, removing any risk of burn marks. This drum excels in producing an evenly roasted batch of superb beans, allowing a higher range of temperature operation, and writes its own new language in thermal dialog – just imagine, reflected heat conduction.

Perfect Heat Dispersion
As a result of extensive research, the ceramic combustion chamber is optimally located in relation to the drum. Heat spreads evenly from the machine core throughout the drum. Our design challenges the more common setup you typically find in an open drum housing that involves secondary air poorly mixed with a heat source. In our innovative configuration, the heat source is located at the bottom. Secondary airflow is propelled by well-calculated jets. Heat is collected at the upper end of the structure using the natural tendency of hot air to rise. Flow and ratio are precisely controlled through jets of air that pass through specially designed holes at the top front end of the sealed and isolated roasting chamber. Here you will find no silly vents, shutters or louvers to keep the flame alive – not with our pre-mix turbo gas burner technology.

Fully Modulated Pre-Mix Turbo Gas Burner Technology
An infrared flame screen is the cleanest, most efficient way to produce energy out of any type of fuel. Ultra low NOx specs fulfill the strictest pollution standards. It may not mean much at this point, but it is all about your health as the operator and your beans. No soot accumulation in the drum to coat your beans, none of the harmful CO produced during operation, no irritated red eyes at the end of the day. Burner runs the full gamut, at any stage, from low power to overkill, controlled by your choice of either a potentiometer or software, with high frequency of infrared reflection towards your choice of either a solid or a perforated drum.

Fast and Effective Cooling
At the end of the roasting cycle, the entire roasted batch is transferred to the cooling group in a matter of seconds. This external group is made of 100% stainless steel with special food-grade material agitation blades, which efficiently shuffle the beans over the cooling mesh. Aided by a high capacity blower, an entire batch is cooled in less than 3 minutes.

Clean, Efficient and Safe Heating System
Coffee-Tech Engineering’s entire Silon ZR7 line features a highly effective pre-mix turbo gas burner. This clean heat source provides maximum gas burning efficiency with minimum levels of carbon monoxide emission. Safe, economical and stable, it features many unique parameters for control and calibration.

Unique Roasting Software
Silon ZR7 features unique roasting software developed by Coffee-Tech Engineering, enabling the user to predefine and program personal roasting profiles. Each parameter can be mapped out and appropriately adjusted by recording the desired heat curves and controlling the variable drum speed profile as well as the speed of the drum venting blower. This can be done at any stage of the roasting process. Numerous roasting profiles can be applied, again and again, with the greatest accuracy.

Comprehensive Set of Features
At Coffee-Tech Engineering, we pay special attention to the less than obvious details: compact, efficient machine structure, batch cooling time, drum evacuation time, size of monitoring control lens and drum-gate. These features are often ignored, however, their impact is substantial on the finished product.

We, at Coffee-Tech Engineering, test every setting and modification in our laboratory to maximize bean potential. Owing to the machine’s cutting-edge technology, the roasting process achieves excellent levels of desired flavor properties: rich sugar content and a wide aromatic spectrum. These spectacular values are reached without burning the “woody” substance of the beans or generating other negative side effects known in roasting.

The Perfect Roasting System
Determining a high level of conductive heat has proved to be the best method for producing a rich product, and this is where we differ from other manufacturers. Since heat conduction is complicated and presents several unresolved issues, many have abandoned it in favor of convective heat that is much more forgivable in terms of the end result: range of flavor properties and shelf life. At Coffee-Tech Engineering, we chose to invest in extensive research in order to solve these issues. In doing so, we are proud to offer a machine that truly reflects our beliefs and understanding of roasting.

Silon ZR7 roasts continuously, while cooling takes place outside the drum, making it possible to maximize the kg of raw beans per hour. The Silon ZR7 features a beautifully streamlined design. It is user friendly, ergonomic, quiet, compact and safe to use. Each function has an individual motor and heat protection.

We take great pride in the Silon ZR7 high-end craftsmanship. It is the result of our long-standing expertise in high-end product design and CAD design. We are sticklers for high-quality materials and components and use manufacturing tools assembled by Coffee-Tech Engineering’s passionate experts.

The Silon ZR7 is available to order with various heating methods, from natural gas and LPG to traditional wood/pellet/processing waste/charcoal heating. As a high-end roasting machine, the Silon ZR7 will ensure reliable operation as well as consistent superb results for many years to come. Its added value lies in that, by owning it, you truly possess a piece of art, a fruit of passion. We can only wish for more chances in life to take on such an endeavor. We do not take it for granted. We are proud of what we accomplished and feel lucky to have made it. We stand by our achievement.

Technology & Features

Drum Roasting
Drum Roasting
Roasting Methods
The primary roasting method in this roaster is drum roasting conduction.
commercial coffee roaster machine Conduction
Conduction
Roasting Methods
Heat is delivered by direct contact between the beans and the hot surface of the drum
roasting machine Low Energy Consumption
Low Energy Consumption
Sustainability
Energy efficient, low electricity consumption
Automatic commercial coffee roaster
Automatic
Optional
Operation is run automatically and handled by an Automatic Roasting Management Software.
large coffee roaster Sub-Atmospheric Combustion Chamber
Sub-Atmospheric Combustion Chamber
Built in Features
By drawing a vacuum in the roaster it allows uniformly better results that are not influenced by atmospheric humidity or atmospheric pressure.
Coffee Roaster Green Product
Green Product
Optional
This product excels in its low rates of emission and air pollution.
Coffee Roaster Smoke Free
Smoke Free
Optional
An efficient and green smoke elimination system, designed by Coffee-Tech R&D
coffee roaster for commercial use Low-NOx
Low-NOx
Sustainability
Ultra low NOx specs fulfill the strictest pollution standards
Coffee Roaster with ceramic coated chamber
Ceramic Chamber
Heating Technology
A ceramic coated chamber surrounding the drum ensures thermal stability and efficiency
commercial coffee roaster In-Drum Extinguisher
In-Drum Extinguisher
Safety
Safety device, a live waterline connected to the drum in case of in-drum fire
roasting machine with Full Modulation
Full Modulation
Built in Features
Fully Modulated Pre-Mix Turbo Gas Burner Technology
roasting machine Multi Point Temp
Multi Point Temp
Control Features
Temperature probes gathering thermal data from the beans, exhaust & drum space
roasting machine with Indirect Flame
Indirect Flame
Heating Technology
Flame is not in direct contact with the drum to ensure even and mild conduction roasting
roasting machine Blower Speed Control
Blower Speed Control
Control Features
Electronic drum venting control, setting convective heat percentage while roasting
commercial coffee roaster Drum Speed Control
Drum Speed Control
Control Features
Electronic drum speed control, setting conductive heat percentage while roasting
Coffee Roaster Manual Safety Crank
Manual Safety Crank
Safety
The manual safety crank allows you to manually evacuate your beans should your roaster loose its power supply.
commercial coffee roaster with Touch Screen
Touch Screen
Control Features
Our touch screen control system allows you full, simplified control and monitoring of your roasting process. 
coffee roasting machine commercial Roast Data Logger
Roast Data Logger
Control Features
A PC-supported profile software, featuring beans temp', drum temp' and rate-of-rise graph
Convection
Convection
Roasting Methods
Hot air is forced through the beans
Cocoa Roasting
Cocoa Roasting
Roasting Methods
Cocoa roasters have a dedicated internal design for cocoa, while keeping the original external dimensions and form.

Technical Specifications

Batch Capacity
1–7 kg (2.2–15.5 lb) of raw cocoa
Roasting Cycle
Up to 2 batches per hour
Electrical Specifications
50/60 Hz. 1250 W 380V 3 phases
Quality and safety compliance
CE , RoHS, EMC
Body
Full precision metal work, top quality material and hardware, galvanized steel, carbon steel and stainless steel
Drum Operation
Direct drive individual heavy-duty gear motor 1/3 hp digital variable drum speed control included
Heating Method
Gas: L.P.G. /Natural Gas (29–68 kBTU/h)
Drum Housing
Sub atmospheric combustion chamber
Gas Consumption
0.5–0.75 (1.1–1.65 lb) per hour of roasting
Cooling agitation
Direct drive individual heavy-duty gear motor ¼ hp.
Cooling Blower
High capacity cooling blower, cooling time is about 1–2 minutes
Bearing
Four main bearings, two (F&R) precision dry bearing with zero tolerance for centering the drum and two high temperatures, self-aligned bearings. Micrometric drum alignment mechanism
Process Quality Control
Large pyrex lens for easy monitoring of roasting progress. Digital double temperature controller for heat control allows determining temperature range for roasting
Safety
Safety drum discharge / In drum extinguish / Emergency stop
Dimensions
121 (w) X 150 (d) X 153 (h) cm / (48” (w) X 59” (d) X 60” (h) Inch With cyclone
Weight
255 kg (562 lb)
Also Available
Traditional wood / Charcoal heating conversion / Automatic software
Chaff Evacuation
Cyclone type chaff collector with booster blower - for clean in - house roasting
Wish to hear more about our roasters?
Contact Us
Coffee-Tech Engineering - Advanced Commercial Coffee Roasters
We are passionate about making the best coffee roasters in the world. We dare write such a compelling statement because we build our coffee roasters along unmatched sets of standards; you can count on us to go beyond your expectations.
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  • Commercial Coffee Roasters
    • Ghibli Firewood Roaster
    • Ghibli R15 Roaster
    • Ghibli R30 Roaster
    • Ghibli R60 Roaster
    • Ghibli R90 Roaster
  • Shop Roasters
    • Solar Eco Shop Roaster
    • FZ94 Evo Shop Roaster
    • Silon ZR7 Shop Roaster
    • Avirnaki Smoke Trapping System
  • Cocoa Roasters
    • Silon ZR7 Cocoa Roaster
    • Ghibli R15 Cocoa Roaster
    • FZ94 Evo Cocoa Roaster
  • Lab Equipment
    • FZ94 Evo Roaster
    • Avirnaki Smoke Trapping System
  • Smokeless Roasting
    • Afterburner
    • Avirnaki
    • Industrial Afterburner
    • Commercial Avirnaki
Coffee-Tech Engineering