.

Translation

The Sterling Series

The Sterling Series draws on the strengths of our previous designs and integrates them with new and innovative ideas. This has resulted in improvements to both  the performance and the ease of maintenance of our Presses. Across this Series of Presses there is a common format, a common design philosophy and a common objective:

To be the best Press available for: for Value, for Performance, for Reliability, for Ease of Maintenance

Sterling Series

	Pre-Press	Full-Press	Rendering
100 Series	100 TPD	15 TPD	1 - 2 TPH (Cake)
200 Series	200 TPD	30 TPD	3 - 3.5 TPH (Cake)
400 Series	350 TPD	55 TPD	4 - 5 TPH (Cake)
600 Series	600 TPD	90 TPD	7 - 8 TPH (Cake)
800 Series	800 TPD	140 TPD	9 – 11 TPH (Cake)

The Sterling Series of Presses has been designed to cover the needs of both the Rendering and Vegetable Oil Industries. The Series design is modular and based around a number of Drive and Cage configurations. Across the Series our proven Multi-Stage Low Compression Worm Assemblies are used. These give the best extraction rates but without the heat generation, wear and power demands of conventional Worm Assembly designs. From the outset, features such as the ease of maintenance and the lifting and handling of heavy components has been considered.

	Pre-Press	Full-Press	Rendering
100 Series Cage Diameter: Working Length: Nominal Power:	100 TPD 200 mm 1500 mm 75 kW	15 TPD 200 mm 1500mm 55 kW	1 - 2 TPH (Cake) 200 mm 1500mm 75 kW
200 Series Cage Diameter: Working Length: Nominal Power:	200 TPD 250 mm 1800 mm 150 kW	30 TPD 250 mm 1800 mm 90 kW	3 - 3.5 TPH (Cake) 250 mm 1800 mm 132 kW
400 Series Cage Diameter: Working Length: Nominal Power:	350 TPD 300 mm 2100 mm  250 kW	55 TPD 300 mm 2100 mm  150 kW	4 - 5 TPH (Cake) 300 mm 2100 mm  200 kW
600 Series Cage Diameter: Working Length: Nominal Power:	600 TPD 350 mm 2500 mm 500 kW	90 TPD 350 mm 2500 mm 250 kW	7 - 8 TPH (Cake) 350 mm 2500 mm 350 kW
800 Series Cage Diameter: Working Length: Nominal Power:	800 TPD 400 mm 3200 mm 700 kW	120 TPD 400 mm 3200 mm 300 kW	9 – 11 TPH (Cake) 400 mm 3200 mm 500 kW

General Features of the Sterling Series Design:

Feed End Drive

All the Sterling Series Presses are Feed End driven, and the reason is simple.  The pressing operation produces an atmosphere that is hot, dirty and high in moisture, and this atmosphere is at its worst towards the Discharge End of the  Press. This dirty atmosphere is not good for the reliable mechanical operation of machinery. We therefore aim to put the critical drive elements of the Press, in the cleanest environment possible, as far away from these dirty areas as possible. Additionally the Feed End of the Press is not subject to the higher pressures experienced at the Discharge End it is much easier to seal the drive elements from the working areas of the Cage. All in all this gives you a much more reliable Press.

An additional advantage of the Feed End Drive layout, is that it makes the Discharge End components, those subjected to the most severe wear, the most accessible on the Press. It also allows the main Worm Shaft to be withdrawn from the Press without disturbing either the Gearbox or Thrust Bearing.

Proprietary Gearbox

The main Gearbox for the Press is always bought in from a specialist Gearbox manufacturer. The economies of scale and the design expertise that a specialist can delivery means a much more cost effective and more reliable Press for you.  We always use a world class manufacturer, typically David Brown Textron, although other manufactures Gearboxes can be fitted.  We always use a Helical Gearbox, on the Sterling Series, they are highly efficient, reliable and simple to maintain. Again the Feed End Drive layout of the Press helps by giving good access to the Gearbox for maintenance.

Fully Welded Frame and One Piece Main Cage

The Frame holds all the elements of the Press together and in correct alignment. The Press will not function correctly and reliably if the frame is worn or bent. How many times have you seen an older design of press with individual cages moving round and round past each other and the frame? How much maintenance is needed on those Presses? The fully welded Frame construction that we use maintains the integrity of the Presses. There are no joints to work loose and the installation of the machine is a straight forward operation without the need for complex alignments to be maintained.

The heart of the Press is the Cage, this is where the work is done and hence it is the element of the Press that is subject to the most loads. We use a pair of heave duty casting for the Cage. Although initially a more expensive, this more than pays for itself in the reliability and durability of the finished product. The Cage is split on the vertical center line and each half lowers to the horizontal for quick and easy maintenance. Appropriate Cage lifting equipment is supplied with each Press. 

Wearing Parts

All parts of the Press that come into contact with the process material are replaceable.  Cage Linings and Worm Assembly parts are made in specialist materials to withstand the wear forces that they will encounter in operation. In suitable applications our GoldStar material will give a wear life several times that of conventional Hard-Facings.  All wearing parts are typically bolted in or clamped into the Press. For example, each field of Bars in the Cage is individually clamped, so that it can be replaced without removing adjacent fields.

The Worm Assembly parts can be fitted with an 'O' Ring or Stainless Steal Ring sealing system. The parts are then tightened using a Hydraulic Shaft Tensioning System. The high pressure achieved improves sealing between the components, prevents ingress of material onto the shaft and therefore makes removal shaft pieces easier. 

[ Home Page ] [ Up a Page ]

(c) De Smet Rosedowns:  August 24, 2007