Drum roasters

Drum roasters series NEPTUNE

As world market leader for the manufacture of roasting machines, PROBAT cannot only look back on a long tradition but also sees itself with the responsibility to drive forward innovations. As well as centrifugal roast­ ers and tangential roasters, drum roasters, among other things, have been in the PROBAT range for well over one hundred years. The first drum quick roasters were produced in Emmerich as early as 1884. The drum roaster R successfully established itself in the market in 1967. With the modern NEPTUNE series, the drum roasters have been pre­ senting themselves with new brand names – just like the other PROBAT products – since the beginning of 2007.

The drum roasting procedure
The roasting procedure for NEPTUNE roasters combines a range of posi­ tive characteristics which can be described as follows: The green coffee is filled in batches using the feeding funnel. The roasting supply air is conducted both through as well as around the roasting drum for heating the roasting product. The contained thermal energy is thus applied 1. conductively via the contact of the beans with the roasting drum (approx. 30%) and 2. convectively via the hot roasting supply air flow (approx. 70%). The roasting drum has guide plates which effect a product flow in the opposite direction to the roasting air. The roasting process can be specifically ended by feeding water whereby pre­cooling of the product is also achieved (except NEPTUNE 200). Afterwards, the drum lid opens for emptying the roaster and the roasted coffee cools in the provided cooling sieve gently using ambient or outdoor air.

Other roasting procedures

Tangential roasting procedure

Centrifugal roasting procedure

Drum roasting procedure

Innovative
The uniformity plays a large role for coffee roasting. The NEPTUNE series implements this requirement for the roaster product with state­of­the­art technology and exemplary expertise. Many years of experience, best possible matching of the individual components and perfect heat transfer provide high­quality results for the drum roaster series from PROBAT. The uniform roasting pattern due to the factors mentioned below results in an extremely positive influence on the taste: • Optimum recirculation and even roasting due to the perfectly matched relationship of drum length to drum diameter • Functional mixing system and optimised arrangement of the mixing shovels • Optimum matching of the energy supply, maximum flexibility • Ideal temperature transmission between surface and core of the bean with only a very low temperature difference • Excellent roasting behaviour due to the use of double­walled roasting bins • Minimum energy loss due to optimised insulation of the machine

PILOT

System features – examples
NEPTUNE drum roasters can be operated easily using modern control systems and can be monitored and controlled completely automatically by a PC­based operating station. PROBAT provides a semi­automatic control system for the NEPTUNE 200. The display of the roasting process using a product temperature graph is particularly clear. The control system can also store all data relevant to production such as trending and batch data. Recipe manage­ ment with 999 definable recipes is also available. The available Reflex Automatic additional option for NEPTUNE 500, 1500 and 3000 significantly increases the operating convenience and enables the simple reproducibility of product temperature curves or roasting profiles. PROBAT involved itself quite early with environmental issues. One result is the ECOLOGIST Proforte exhaust air treatment system. This not only protects the en­ vironment but also operates with particular energy efficiency. Other control and system components are avail­ able (see table). PROBAT is also happy to give you individual advice.

Roaster

User-friendly and simple – roasting machine control systems from PROBAT

Exhaust air cleaning system

Overview of the series and components
NEPTUNE series
Code Capacity standard roasting 200 kg/h Batch size Roasting time

35 – 50 kg

12 – 18 minutes

480 kg/h

80–120 kg

8 – 20 minutes

1,500 kg/h

240 – 320 kg

8 – 20 minutes

3,000 kg/h

480 – 640 kg

8 – 20 minutes

Control system and environmental technology

PILOT ROASTER Professional

PILOT ROASTER Excellence

Green coffee pre-heating O O

PILOT ROASTER Basic

Thermal pre-cleaning

Reflex Automatic

Reflex Manual

Code 200 500 1500 3000

S S S S O O O S S S O O O

O O O O

O O O O

O O

O O* O*

S = standard, O = optional, * only non-recirculating version

Afterburner

Catalyzer

Proforte

Roasting system examples

NEPTUNE 1500

NEPTUNE 200

NEPTUNE 500

Sampling on the NEPTUNE 1500

Strong arguments
Do want to expand your system or are you interested in an appropriate control system for your roasting machine? PROBAT has various brochures ready for you. All technical issues are comprehensively explained and thus provide a valuable aid for decision making. Or do you want to contact a PROBAT employee directly? Further information can be obtained using the telephone number +49 2822 912­0. PROBAT has also compiled a lot of information about roasting for you on the World Wide Web. www.probat.com

PROBAT-Werke von Gimborn Maschinenfabrik GmbH Reeser Str. 94 46446 Emmerich am Rhein, Germany Tel. +49 2822 912­0 Fax +49 2822 912­444 E­Mail: info@probat.com www.probat.com

GB 00147 Subject to modifications! 04/08