The Silon ZR7 is the ultimate expression of power and precision in coffee roasting. It promises unlimited roasting possibilities and an exceptional roasting experience by delivering conductive heat closer to the beans than ever dared before. Roastmasters, we dedicate this roaster to you, giving you absolute control, complete flexibility, and the power to achieve and repeat your exact desired profile.
Built-in magnifying lens with integrated lighting for precise, close monitoring
Swift, responsive pneumatic doors quickly load the drum or release the roasted beans.
Easily pour cooled beans to the designated container or a bag placed inside.
Precisely monitor in-drum pressure to ensure consistent results and smooth operation.
Large, clear pyrex viewing lenses for monitoring the beans and burner.
Necessary safety measure in an extreme event of fire inside the drum.
Built with precision metalwork, and premium hardware for best reliability.
Intuitive touch screen interface for smooth, responsive control
The Silon ZR7 is engineered for uncompromising precision and repeatability. Once a profile is set, it is reproduced with absolute accuracy. Consistency is achieved through a comprehensive control system combining sub-atmospheric combustion chamber, highly controlled airflow, precise thermal management, and continuous monitoring of all critical parameters. By fully isolating the roasting process from external environmental fluctuations such as changes in ambient conditions, air pressure, and humidity, the Silon ZR7 delivers a level of consistency that sets the benchmark in coffee roasting.
The Silon ZR7 gives roastmasters absolute control over every stage during the roast. Heat input, airflow, and drum speed are fully modulated from 0 to 100 percent, allowing precise micro adjustments in real time. Every parameter is clearly displayed and continuously monitored, giving the operator complete visibility and confidence throughout the process. This level of control allows experienced roastmasters to shape flavor with ease, precision, and total freedom.
Our latest-generation burners represent the highest standard achieved in the industry and are designed and used exclusively by Coffee-Tech Engineering. Advanced pre-mix technology distributes the air–fuel mixture evenly across a screened surface, creating a stable, predictable flame. This eliminates uneven flame peaks, ensures complete combustion, reduces NOx and CO₂ emissions, and delivers precise, repeatable heat, keeping the roastmaster fully in control, uninterrupted by flame instability, and making profiles easier to reproduce.
The Silon ZR7 features a ceramic-lined drum housing that insulates the roasting chamber and maintains stable, evenly distributed heat throughout the roast. The thick ceramic layer shields the drum from external temperature influence, guaranteeing thermal stability and consistent roasting conditions. At the same time, the insulation significantly reduces heat loss and prevents constant reheating, significantly lowering gas consumption and optimizing energy efficiency.
Our geometric drum design was engineered in-house to maximize contact between each bean and the drum surface, promoting consistent heat transfer throughout the roast. This precise bean movement results in highly uniform batches with repeatable outcomes. At the end of the roast, the same geometry enables rapid and complete evacuation, preventing unintended over-roasting and ensuring the coffee stops developing exactly where you intended.
The Silon ZR7 is equipped with a high-performance turbo cooling system capable of cooling a full 7 kg batch in less than three minutes. Rapid cooling immediately stops the roasting process, preventing over development and locking in the intended flavor profile. The result is cleaner cup expression, higher consistency, and full control over the final roast outcome.
Our Vortex TO4 drum uses a precise spiral airflow pattern that drives heat through the bean mass in a controlled, continuous motion. This optimized airflow achieves stronger heat transfer with less intake air, increasing efficiency while maintaining full control over the roast. The result is even bean development, improved energy efficiency, and consistently higher cup quality.
The Silon ZR7 supports two fully integrated smokeless solutions, engineered to connect seamlessly with the roaster and meet demanding environmental requirements. The Afterburner, powered by gas, eliminates smoke and emissions through high-temperature combustion, effectively reducing CO, NOx, SOx, and other pollutants. For locations requiring an electric solution, the Commercial Avirnaki offers a low-consumption, electric-powered smoke eliminator that efficiently reduces emissions without the need for external ducting. Both systems are highly efficient, reliable, and purpose-built to perform optimally with our roasters.
Perfect heat dispersion assures essential coffee compounds are fully developed and enhanced during the roasting process.
A unique combination of conduction and controlled convection assures the final cup profile displays excellent, high aroma levels.
Advanced thermodynamic design and a clean, precise combustion method secure a high-quality, smooth cup profile.
Engineered for high-output performance with minimal power consumption, ensuring maximum energy savings and a reduced carbon footprint.
Record and analyze your roasting profiles with ease. The Silon ZR7 is compatible with all popular roast logging software.
Regular software updates are developed by our team and can be downloaded via Wi-Fi, allowing even older models to benefit from the latest improvements and features.
The Silon ZR7 features an extremely compact footprint, and is the most efficient 7kg roaster on the market. allowing it to integrate easily into your current setup without taking up much space or compromising on quality.
Backed by an experienced technical team and a global network of authorized distributors, the Silon ZR7 is supported with responsive after-sales service, expert technical guidance, and long-term service availability to ensure reliable performance for years to come. With three decades of experience building top-quality coffee roasters, Coffee-Tech Engineering is a partner you can rely on.
Built with premium materials and carefully selected components, the Silon ZR7 is engineered for durability, consistent performance, and long-term reliability. The Silon has continuously evolved over the years, with first-generation machines still operating today.
Bean, drum, and exhaust temperatures are continuously monitored with three integrated probes for precise thermal control, and allowing high repeatability.
The Silon ZR7 is built with a sealed structure that prevents emissions from escaping into the roasting space, ensuring a safe and controlled working environment. An integrated in-drum fire extinguisher allows for immediate response in the event of a drum fire. In addition, a manual safety crank enables the roastmaster to evacuate the beans manually in the event of a power loss, ensuring full control under all operating conditions. At Coffee-Tech Engineering, safety is engineered with responsibility and intention, because protecting the roastmaster is as critical as protecting the roast.
Batch Capacity
1-7 kg (2.2-15.5 lbs) of Green Coffee
Roasting Cycle
11-17 minutes for a full batch
Hourly Output
Approx. 28kg (62 lbs)
Quality and safety compliance
CE, RoHS, EMC
Electrical Specifications
230/380V | 50/60Hz | 1250W
Drum Motor
Individual, heavy duty gear motor. Digital variable drum speed control comes standard
Heating Source
Gas: L.P.G. / Natural Gas (7-20 kw) fully modulated burner
Cooling Blower
High capacity cooling blower, cooling time is about 2-3 minutes
Chaff Evacuation
Cyclone chaff collector with booster blower - for clean roasting and cleaner exhaust
Bearings
Heavy duty, precision bearings. Long intervals between required maintenance
Dimensions
121W x 150D x 153H cm (48" x 49" x 60")
Weight
255 kg (562 lbs)
Body
Full precision metal work, top quality hardware, galvanized steel, carbon steel and stainless steel
What is the batch capacity range of the Silon ZR7?
The Silon ZR7 offers a versatile batch capacity of 1–7 kg (2.2–15.5 lb). This wide range allows roastmasters to handle everything from small-batch profile development to full-scale production without compromising on quality either way.
Who is the Silon ZR7 designed for?
We designed this machine for professional Roastmasters who demand absolute control and accuracy from their roaster It is ideal for specialty roasteries that require precision, repeatability, and the flexibility to shape complex flavor profiles.
Is the Silon ZR7 Smokeless?
If you choose so, yes. The Silon ZR7 supports two integrated solutions: a gas-powered Afterburner for total emission elimination, or the Commercial Avirnaki, our electric smoke eliminator. Whichever works for you, both are high-quality products developed by us to integrate seamlessly with your roaster.
How does the Silon ZR7 ensure roast repeatability?
Consistency is achieved through a sub-atmospheric combustion chamber and ceramic insulation. By isolating the roasting environment from external fluctuations such as ambient temperature and humidity - the Silon ZR7 reproduces your set profiles with absolute accuracy.
What makes the Silon ZR7 drum design superior?
Our in-house designed Vortex TO4 aerodynamic drum creates a precise spiral airflow pattern that maximizes bean-to-surface contact and heat transfer. This ensures highly uniform development across every batch. Moreover, the use of precise, controlled airflow ensures that all consumed energy is utilized with maximum efficiency, making this design the most gas-saving solution on the market.
Is the Silon ZR7 compatible with roast logging software?
Absolutely.The Silon ZR7 is designed for seamless data logging and is fully compatible with all popular industry software, allowing you to record, analyze, and refine your profiles with ease.
How crucial are safety features in a coffee roaster? what does the silon zr7 provide?
Safety is highly important and sadly overlooked. For us, protecting the roastmaster is a must. The Silon ZR7 is built with a sealed structure that prevents harmful emissions from escaping and contaminating your lungs over prolonged exposure. For emergency control, it includes a dedicated drum fire extinguisher lever and a manual safety crank for safe bean evacuation during power loss. we take the highest measures to ensure a safe and healthy working environment.
How are software updates handled?
The Silon ZR7 supports Wi-Fi updates. Our team continuously develops new improvements, ensuring your roaster benefits from the latest software features and control optimizations even years after purchase.
What kind of technical support is available?
Every Silon ZR7 is backed by Coffee-Tech Engineering’s three decades of expertise. You have access to our experienced technical team and a global network of authorized distributors for responsive after-sales service.
Is the Silon ZR7 built for long-term industrial use?
Yes. Built entirely from precision metalwork, the ZR7 is engineered for durability. Our commitment to Lasting Quality is proven by our first-generation machines which are still in operation today supported by long-term parts availability.
