The Sterling Series Pressing Excellence Pre Pressing Full Pressing Rendering
The Sterling Series - Rosedowns & Desmet Ballestra De Smet Rosedowns Rosedowns was founded in 1777, and we have long been a major player in the Worlds Oilseed and Rendering Industries. Our knowledge of Screw Presses is second to none, and as equipment suppliers we have always worked closely with our customers to ensure that our parts and equipment truly meet their needs. Today De Smet Rosedowns is at the forefront of the Screw Press and Wearing Parts industry, combining our vast experience with advancing technologies to meet the present and future needs of the Oilseed and Rendering Industries. In keeping with our quest to exceed customers expectations, we have an extensive programme of Press and process development, both in-house and in co-operation with UK academic institutions. As a partner to your business our commitment will go beyond the supply of your Presses, to provide a complete service to you for Parts and Pressing expertise. Desmet Ballestra As part of the Desmet Ballestra Group we have access to a world wide network of expertise in every aspect of the Oils and Fats processing industry. With a turn over in excess of EUR 120 million and more than 600 people in 17 regional offices Desmet Ballestra truly is a global solution provider. The world-wide reach of Desmet Ballestra means that there is an office near you providing local service and support. All backed up by direct access to the full range of Rosedowns experience and resources. Today over 4,700 plants in 148 countries carry the Desmet Ballestra name. From Seed Crushing and Oil Refining, to Oleochemicals and Biodiesel plants we have the expertise to design and supply the complete plant to you. A strong commitment to Research and Development keeps the group as a technological world leader and a powerful ally to your business. The Sterling Series As your needs as processors change over the years so must our products. Building on the proven success of our Sterling Press range we have now introduced our latest series of Presses. These Presses draw on the strengths of our previous designs and integrates them with new and innovative ideas to both improve performance and simplify maintenance. All the Presses in the Sterling Series share a common format, a common design philosophy and a common objective: To be the best Press available : for Performance, for Reliability, for ease of Maintenance. for Value, The Parts Service Our commitment to you goes far beyond the supply of your next Press, we will work with you throughout the life of your Press. Our Quality Spares Service and Performance upgrades will ensure that you get the best possible performance throughout the life of your Press. We carry stocks of Parts at our factory in Hull and at Strategic locations around the world so that we can respond quickly to your needs. If you have a particular processing requirement, we can help there too. Tell us what you want and we will do our very best to assist you. But it s not just Parts; our Parts Department is able to provide experienced personnel for Press maintenance and trouble-shooting, As well as helping you with the maintenance of your Presses or the fitting of spare Parts.
The Sterling Series - The Press Range In order to meet the various needs of our many customers we have developed a complete series of Presses. In each of these Series the different variants are tailored to the exacting demands of its particular application. The same design concepts and standards are applied to all the Presses in the Sterling Series. You can be certain that the Press for your requirements offers the highest standards of Strength, Reliability and Performance. Ease of maintenance and operability has been designed in from the outset. These are the simplest Presses of their size to maintain. Rendering Presses The Sterling Series Presses are designed to be reliable and to perform consistently across a wide range of feed materials. The particular problems caused by inconsistent feed material and foreign material are well understood by us and these Presses will not just cope, but cope well with whatever is fed to them. Full & Second Presses Designed to extract the maximum amount of oil from the Seed, these Presses will be worked the hardest of any application. The Sterling Series has therefore been designed for strength ruggedness and reliability in this arduous duty. Pre-Presses Working with Solvent Extraction Plants or ahead of Second Presses, these Sterling Series Presses are optimised for High Throughput and excellent Cake Extractability. These are the highest throughput Presses in the Series. Pre-Press Full-Press Rendering 100 Series 200 Series 75-100 TPD 200 mm 5 Fields 75 kw 150-200 TPD 250 mm 6 Fields 150 kw 15-20 TPD 200 mm 5 Fields 55 kw 25 35 TPD 250 mm 6 Fields 90 kw 1-2 TPH (Cake) 200 mm 5 Fields 75 kw 2.5-3.5 TPH (Cake) 250 mm 6 Fields 132 kw 400 Series 250-350 TPD 300 mm 7 Fields 250 kw 45 55 TPD 300 mm 7 Fields 150 kw 4 5 TPH (Cake) 300 mm 7 Fields 200 kw 600 Series 800 Series 400-600 TPD 350 mm 8 Fields 400 kw 65-90TPD 350 mm 8 Fields 250 kw 6 8 TPH (Cake) 350 mm 8 Fields 350 kw 650-800 TPD 400 mm 11 Fields 600 kw 120 150 TPD 400 mm 11 Fields 300 kw 9 11 TPH (Cake) 400 mm 11 Fields 500 kw
Sterling Series - Mechanical Design Features Simple, Rugged and Reliable: The Sterling Series of Presses is designed and manufactured to the highest standards. The design is kept simple and functional. The simple design with the minimum of moving and wearing parts makes for a rugged, reliable Press that will cope with the most arduous of duties. Design Principles: Feed End Drive Rigid Construction Easy Access for Maintenance Integral Lifting for Heavy Items Maintenance Friendly All too many Presses today are big versions of old designs. The Performance may have improved, but the techniques used for maintenance have not. The Sterling Series has been designed from the outset to make maintenance easier. Two principles have been applied; Simplify the design to remove a maintenance requirement and where maintenance is needed, to offer a practical working method with practical tools. Strong, Rigid Frame Design: The key to this design is the Frame. It is a strong design with a fully welded construction, this maintains the integrity of the Press at all times. There are no joints to work loose and the installation of the machine is a straight forward operation. We have built facilities into the design of the frame, that enable the lifting and handling of the Shaft and Cages and other major components. Feed End Drive: The Pressing operation produces a hot and dirty environment within the Press, this is at its worst at the Discharge End. Therefore all of our Presses are Feed End driven, this keeps the critical drive elements of the Press in the coolest and cleanest environment possible. Our design places the Gearbox and Bearings completely outside the pressing area. This complete separation ensures reliable operation and prevents oil contamination. The Feed End design layout also allows access to the shaft for maintenance without disturbing any major drive elements of the Press. The Discharge End shaft components, those subjected to the most severe wear, are also the most accessible on the Press. Dependable Gearbox: A dependable gearbox is essential for a reliable Press. In-Line Helical Gearboxes are the simplest and most reliable type of Gearbox available, we therefore use them across the Sterling Series. Their larger size is also their main advantage as it gives them a higher thermal capacity. The Gearbox is fitted with a cooling coil as standard. However in many applications it will not be necessary to use it. Our choice of Gearbox is normally for a major UK Supplier with World Wide support. However the design of the Press allows for alternatives to be fitted. The design also allows for the Gearbox to be removed without stripping down the pressing sections of the Press. The Gearbox can be either, Belt Driven for flexibility of operating speed, or directly coupled for superior transmission efficiency and simplicity.
Sterling Series - Mechanical Design Features One Piece Cage Design: The heart of the Press is the Cage, it forms the drainage barrel and has to contain the operating forces of the Press. Our single casting design eliminates joints and movement, gives the maximum drainage and heat dissipation while at the same time giving a strong and rigid structure. Innovative Worm Assembly: The Sterling Series utilises our proven Multi-Stage Pressing Process. This uses a series of integral rotary chokes together with mixers and decompression zones. This brings you Presses offering the best extraction rates but without the heat generation, wear and power demands of conventional assembly designs. Multi-stage Compression reduces the maximum pressure applied, by applying a lower pressure several times. The result is a less densely packed material in the Press that drains better. Good for Pressing and good for extraction. Lower pressures mean lower heat generation, lower power consumption and reduced wear rates. The Cage is split on the vertical centre line and opens fully to the Horizontal, an essential feature for easy maintenance. Each field of Bars in the Cage is individually clamped, so that it can be replaced without removing adjacent fields. Our unique design of Landed Bars simplifies the task of Cage Lining immensely, while maintaining the optimum Bar profile for Oil drainage. Spacers Drainage Relief Discharge End Bearing: The Sterling Series Presses all feature a Discharge End Bearing. This prevents movement of the the Press Shaft and eliminates damage caused by the shaft components knocking or rubbing against the Cage Linings. The Press can safely be left running without feed for as long as is required. The Bearing is positioned outside the discharge end cover and is fitted with a double sealing system to keep the dirt and steam of the Choke area away from the Bearing. Replacement Parts: All parts of the Press that will come into contact with the process material are designed to be replaceable. Cage Linings and Worm Assembly parts are made in special materials to withstand the wear forces that they will encounter. In suitable applications our GoldStar Material will give a wear life several times that of conventional Hard-Facings. In order to maximise Press productivity and to reduce Press down time, the best materials and manufacturing techniques are used for all our replacement Parts. Additionally all wearing parts are either bolted or clamped into the Press, so that they are easily replaceable.
Sterling Series - Optional Features Barring Motor Unique to Rosedowns Presses and suitable for fitting across the Sterling Series is the Barring Motor drive system. The Barring Motor is an auxiliary drive system, that is used to empty the Press of feed material in the event of the failure of the main power supply. The drive is sized to turn the Press very slowly while still delivering the full torque rating So that it will empty the Press of feed material before it sets hard and necessitates opening of the Cages. Integral Cake Breaker The discharge chute of the Sterling Series can be fitted with an integral Cake Breaker. This consists of a rotating cutter and a stationary sizing grid. The Cutter is driven from a Torque Arm GMU. Breaking the cake in the discharge chute means that the cake is broken while it is still hot and pliable from the Press, therefore the power required to break the Cake and the wear on the Breaker is significantly less than for a system installed later in the process. The Barring Motor is selected to be suitable for being powered by a temporary power supply. Choke Arrangements The Sterling Series can be fitted with a number of Choke systems. In most cases our simple maintenance free Choke system is fitted. This system, in conjunction with our Multi-Stage Compression Worm Assembly Designs, gives a good Cake and completely eliminates all the down time and operation problems. In some cases, if greater flexibility is required, our Die-Ring system or even a hydraulically operated fully variable Choke may be fitted. For specialist applications we can even fit a Die-head to produce expanded collets instead of Cake. Development and Customisation As part of our commitment to providing a complete service we are always looking to improve our designs. Working in conjunction with Universities and using our own experienced staff. we are actively researching new ways of reducing residual oils and of reducing the power and wear needed to achieve a low residual. If you have a special need or particular problem then talk to us about it. Our team of specialists and engineers are here to help you improve your process and improve your profitability. Worm - Pressure Piece
Sterling Series - Feeding & Control Compress The COMPRESS system has been designed to control the Press, while monitoring its operation and ensuring that all is working as it should be. A Screw Press is a volumetric machine; its best performance and most consistent operation will be obtained when it is fed with the correct volume of feed. When the feed volume is right the compression will be right and the results will be right. Therefore in Normal Operation the COMPRESS system will maintain a constant feed rate to the Press. The Press Feeder Getting the Feed material into the Press efficiently is as important as the Press itself. There is no point having the best Press in the world if blockages in a feed chute prevent it from feeding. All our Presses are fitted with a positive feeding system. The standard feeder unit has a variable speed horizontal shaft and a fixed speed vertical shaft. The horizontal shaft controls the feed rate, while the vertical shaft prevents blockages forming in the chute and ensures a uniform flow of material into the Press. However, if the plant operating conditions prevent this optimum feed volume being processed, then the COMPRESS system will make appropriate changes to the Feed Rate. For example; if the flow of feed to the Press stops for any reason then the COMPRESS system will reduce the feed rate to a safe waiting condition. As soon as a flow of feed is restored to the Press then the system returns the Feeder speed safely back to its normal operating speed. Reducing the Feeder to this reduced waiting speed will prevent the Press being overloaded when the feed flow is restored. Especially important if the condition of the seed has been altered by the stoppage. Similarly, the COMPRESS system will protect the Press if the feed material changes so that it is developing too high a motor load. In this case the system will alter the feed rate to prevent the Press from overloading. The System will, at all times, maximising the throughput for the available motor power by keeping the Press running at the highest allowable feed rate. The COMPRESS system can be set up with different control characteristics and response times to suit the particular operating conditions of a plant. Aqua-Trol The Aqua-Trol system is a development of the Compress system that helps control Press load on Dry or Fibrous materials. It uses a system of Fluid injection to reduce the load developed at the Discharge End of the Press. It is especially suitable for Rendering and difficult High Pressure Pressing applications such as Palm Kernel Pressing. Because the fluid is injected at the Discharge End of the Press, after the bulk of the oil or fat has been extracted, the Pressing operation is not compromised. However the lubricating effect of the fluid will significantly reduce the power absorbed in the Press.
Worldwide presence close to you More Information on our Web Sites www.rosedowns.co.uk www.desmetgroup.com De Smet Rosedowns Ltd Cannon St, Hull, HU2 OAD, UK Tel: +44 (0)1482 329864, Fax: +44 (0)1482 325887 E-Mail : Info@Rosedowns.co.uk 18-Jan-05