Silon ZR7 Shop Roaster

silon zr7 shop roaster

Silon ZR7 Shop Roaster

solar eco shop roaster

1-7Kg Batch Capacity

ghibli r15 commercial roaster

Turbo Gas Burner

silon zr7 shop roaster

Touch Screen Control

The Crown Jewel of Shop Roasters!

The Silon ZR7 was originally researched and designed as a tool for coffee artisans who craft their own beans, batch by batch, and deserve the best tool to serve with great professional pride. It’s built to the highest standard in every possible respect: quality of design, all-around quality of build and quality of coffee produced.

It’s a tool made for the absolute pros; it delivers conductive heat even closer to the beans compared to any other coffee-roasting machine and has removed all built-in limitations that are sometimes deemed necessary for a commercial-scale machine. It can be compared to a professional rally driver driving with the anti-lock braking system (ABS) switched off – this means you have total control, and you need to take charge to stay fully on top of things when roasting your world-class coffee. It’s designed to help you take it right to the edge, very close, but never too far.

  • Advanced thermodynamic characterization: A tightly sealed and controlled ceramic combustion chamber design inspired by extensive research into conductive and convective heat pathways.
  • Robust and accurate drum housing: Ensuring perfect alignment of drum spin throughout the product’s entire lifecycle. Greased hemispherical bearings, zero-tolerance precision dry-slide bearings, and a micrometric mechanism to adjust the drum gap ensure the edge of the drum stays perfectly perpendicular to the front plate of the machine at minimal tolerance.
  • Drum proportion: Optimizing the ratio of bean mass to metal contact area for a superb conductive thermal dialogue.
  • 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 both 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 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 a precise ratio.
  • Fully modulated pre-mix turbo gas burner: The burner is fully controllable from low power to overkill with a high frequency of infrared reflection towards the drum. Ultra-low NOx specs in infrared flame screen achieve the cleanest, most efficient energy production. No soot accumulation in the drum or harmful CO emission.

In the Silon ZR7, an airstream blasts in a spiral motion into the drum and through the coffee beans, requiring a smaller amount of air to enter the roaster for a full effect. The longer spiral path across the drum and through the coffee bed is unlike the old and traditional roaster mechanisms, which had a perforated backplate allowing huge amounts of air into the drum in a short, straight path.

The beans are not stripped away from their coffee goodness, while the energy is also used to maintain the heat right next to the exhaust without working on the coffee itself. This innovative approach ensures a unique added value offering for cost-effectiveness, energy optimization, and enhanced flavour. Lab tests have shown a huge improvement in the coffee’s solids content and density, with amazing improvements in gas consumption, roasting time and fume emission.

The ceramic combustion chamber is optimally located in relation to the drum. Heat spreads evenly from the machine core throughout the drum. This 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 this 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. There are no vents, shutters or louvres to keep the flame alive thanks to the pre-mix turbo gas burner technology.

Clean, Efficient and Safe Heating System

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. No soot accumulation in the drum to coat your coffee, no harmful CO produced during operation, and no irritated red eyes at the end of the day. maximum gas burning efficiency with minimum levels of carbon monoxide emission. Safe, economical and stable, it features many unique parameters for control and calibration.

The Pre-Mix Turbo Gas Burner runs the full gamut, at any stage, from low power to overkill, controlled by your choice of either a potentiometer or software, with a 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.

Unique Roasting Software

The Silon ZR7 features unique roasting software developed by Coffee-Tech Engineering, enabling the user to predefined 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

Coffee-Tech Engineering has paid 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 brew.

Every setting and modification are tested in laboratory settings to maximize bean potential. Owing to the machine’s cutting-edge technology, the roasting process achieves excellent levels of desired coffee 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 cup, and this is where we differ from other manufacturers. Since heat conduction is complicated and presents several unresolved issues, many have abandoned it in favour of convective heat which is much more forgivable in terms of the end result: range of coffee properties and shelf life.

The Silon ZR7 roasts continuously, while cooling takes place outside the drum, making it possible to roast up to 28 kg of green 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.

Silon ZR7 features high-end craftsmanship which is a result of long-standing expertise in high-end product design and CAD design. It’s available to order with various heating methods, from natural gas and LPG to traditional wood, pellet, coffee processing waste, and 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.

Technology & Features

solar shop roaster

Drum Roasting

The primary roasting method in this roaster is drum roasting conduction.

solar shop roaster

Conduction Heating

Heat is delivered by direct contact between the beans and the hot surface of the drum.

solar shop roaster

Convection Heating

Hot air is forced through the beans.

solar shop roaster


(Optional) Operation is run automatically and handled by an Automatic Roasting Management Software.

silon zr7 shop roaster

Ceramic Chamber

A ceramic-coated chamber surrounding the drum ensures thermal stability and efficiency.

silon zr7 shop roaster

Indirect Flame

Flame is not in direct contact with the drum to ensure even and mild conduction roasting

fz94 pro lab roaster

Multi Point Temperature

Temperature probes gather thermal data from the beans, exhaust & drum space.

silon zr7 shop roaster

In-Drum Extinguisher

Safety device, a live waterline connected to the drum in case of in-drum fire.

fz94 pro lab roaster

Roast Data Logger

A PC-supported profile software, featuring bean temp’, drum temp’ and rate-of-rise graph.

solar shop roaster

Low Energy Consumption

Energy efficient product, low electricity consumption

solar shop roaster

Green Product

(Optional) This product excels in its low rates of emission and air pollution.

solar shop roaster


(Optional) An efficient and green smoke elimination system.

silon zr7 shop roaster


Ultra-low NOx specs fulfill the strictest pollution standards.

fz94 pro lab roaster

Blower Speed Control

Electronic drum venting control, setting convective heat percentage while roasting.

fz94 pro lab roaster

Drum Speed Control

Electronic drum speed control, setting conductive heat percentage while roasting.

solar shop roaster

Manual Safety Crank

The manual safety crank allows you to manually evacuate your beans should your roaster lose its power supply.

solar eco shop roaster


The touchscreen control system allows you full, simplified control and monitoring of your roasting process.

silon zr7 shop roaster

Award-Winning Technology

Coffee-Tech Engineering has won multiple awards within the world of coffee for contributions both in design and technological innovation.

silon zr7 shop roaster

Sub-Atmospheric Combustion Chamber

Sub-atmospheric pressure is maintained in the roaster during the roast cycle. By drawing a vacuum in the roaster, it allows uniformly better results that are not influenced by atmospheric humidity or atmospheric pressure.

silon zr7 shop roaster

Full Modulation

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.

ghibli r15 commercial roaster

Vortex T04 Drum

Enhances the robust qualities of coffee, accommodating various roasting styles to yield richer aromas and an exceptional cup profile.

Technical Specifications


Full precision metal work, top quality materials and hardware.

Batch Capacity

1–7 kg (2.2–15.5 lb) of green coffee

Roasting Cycle

11-17 minutes ± 4 batches per hour

Quality and Safety Compliance


Heating Method

Fully Modulated, high frequency, infrared burner. (7kW – 20 kW)

Chaff Evacuation

Full-size, high-capacity cyclone chaff collector


255 kg (562 lb)


Heavy duty, precision bearings. Long intervals between required maintenance.

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.

Exhaust Specifications

Air Volume Cyclone Exhaust – 280 CFM
Cyclone Outlet Temperature – 140°C
Cyclone Duct Diameter – 160 mm
Air Volume Cooling Exhaust – 1300 CFM
Cooling Duct Diameter – 100 mm
Cooling Outlet Temperature – 80°C

Also Available

– Wood/charcoal heating conversion
– Pneumatic doors
– Automated software

Drum Housing

Sub atmospheric combustion chamber

Cooling Agitation

Individual, heavy-duty gear motor

Cooling Blower

High-capacity cooling blower, cooling time is ±3 minutes


Safety drum discharger, in drum extinguisher, emergency stop button.

Heating Method

Gas: L.P.G. / Natural Gas (7-20 kw) fully modulated burner.

Electrical Specifications

220-240 Volts, 50/60 Hz, 1250 Watt


48” (w) X 59” (d) X 60” (h) Inch With cyclone

Drum Operation

Individual, heavy-duty gear motor. Digital variable drum speed control comes standard.

Noise Level

While idle – 30dB
While Roasting – 55dB
With activated cooling group – 72dB

Gas Specifications

Gas Type – Natural gas or LPG
Minimum Inlet gas Pressure – 25 mbar
Maximum Inlet gas Pressure – 65 mbar
Gas Consumption for LPG gas – Avg. 30 grams of gas per 1Kg of
0.5–0.75 kg (1.1–1.65 lb) per hour of roasting

Download Documentation

Download Product Brochure

Download Product Dimensions

Additional information

Weight566 lbs
Dimensions70 × 53 × 63 in

Support & Sales Inquiries

For support and sales inquiries, kindly reach out to James or Peter using the information below. For service, repairs, and installations, please get in touch with Ray from Cellar-Tek Services.

James Balfour

Sales & Roaster Training

[email protected]


james at coffee tek

James credits a pour-over in a Pacific Northwest coffee shop with opening his eyes to the world of fine coffee – and to a new and different style – bright, acidic & fruity coffee.

He had been enjoying brewing coffee in everything from a French Press, AeroPress and Moka-pot, but this pour-over experience was an awakening, and things haven’t been the same for him since the first sip of that pour-over.

When asked what his go-to coffee is these days, his answer is - It depends...... He’s partial to pour-overs, especially in the warmer months where the bright, fresh characteristics can shine through. He also loves espresso - describing it as a magnifying glass for flavours.

James has been an amateur coffee roaster for over 2 years and has completed his Level 1 Certification in Coffee Roasting. He spends a lot of time at Red Bird Roasting, working on perfecting his roasting game!

Peter Glockner

Sales & Marketing

[email protected]


peter glockner at coffee tek

With his first “A-HA” moment fueled by an order of “traditional cappuccino” at The Bean Scene in 1998, and armed with a Fresh Roast SR300 coffee roaster and a Saeco Estro Vapore espresso maker, Peter has been conducting smokey coffee-roasting experiments at home for over 25 years.

He prefers bolder flavoured coffee with unique flavours that can still stand out when a bit of steamed milk is added to the mix. He typically makes an espresso in the morning using test roasts from Red Bird Roasting. His go-to at work is an espresso from a Pavoni manual lever-style machine mixed with a bit of hot water to make a strong Americano.

Pete loves sharing his passion with his family each Christmas by roasting them a custom bag of coffee that he feels most closely resembles their personality and including those tasting notes overlayed on an old family photo of them for the label.

Powell Maxfield

Equipment Sales & Engineering

[email protected]


powell at coffee tek

Powell remembers getting up early to go to work with his Dad, and on the first day, they arrived to work a half-hour early. He was surprised to find a break room full of his dad’s colleagues who had arrived at work well before opening in order to enjoy a cup of coffee, converse and connect as a team. As Powell recalls, “It was a culture I had never seen before. I poured a coffee and blended into the group. The coffee looking back was not the best, but the first experience is engrained in my mind.”

Since then, Powell’s love of coffee has been fostered throughout his travels. His first “A-HA” moment with coffee was when he had an authentic cappuccino for the first time at a small café in Italy. He describes the rich, creamy espresso paired with frothy milk as a “revelation” – perfectly balanced flavour and textures. From that moment on, he was hooked on fine coffee and began exploring brewing methods and coffee profiles.

Powell is an experienced engineering & sales professional with a background in various mechanical equipment & working with customers on equipment solutions. With over a decade of experience in the beverage industry, he’s ready to put his experience to work for you!

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