A round vibrating separator is a screening machine that sorts dry materials by particle size and clears liquids of coarse solids: one to four round screens stacked in stainless steel frames, shaken by a vibratory motor underneath. Material fed at the centre spreads over the screen; what is too big leaves through a spout at the rim, and what passes goes on to the next screen or out at the bottom. Peltech builds the AlphaScreen range in Malaysia, from 30 to 72 inches, with direct or indirect drive, mainly for crude palm oil screening in palm oil mills and for food, chemical, ceramic and recycling plants. Our support and service teams in Johor, for Malaysia and Singapore, and in Jakarta, for Indonesia, look after every unit, with screens and spare parts in stock across the region.
A cover with a central inlet closes the top frame and brings the feed to the centre of the top screen. Mills screening crude palm oil often run with an open top and a feed pipe over the centre.
Round screens of stainless steel mesh stretched to high, even tension on a screen ring. Each deck sits at the bottom of its frame and is clamped between two frames; the mesh is chosen for the cut you need.
Stainless steel frame rings that stack on top of each other. Each one carries a screen deck and its own spout, and the frames are joined with welds over a large surface, not end to end.
A spout at screen level on the rim of every deck. What stays on that screen travels to the rim and leaves here; flexible sleeves connect the spouts to the plant chutes.
Solid clamp rings pull each joint between two frames tight. The AlphaScreen clamp has a 16 mm bolt and a 3 mm cap for day-to-day mill service.
The bottom frame is a pan that collects everything that has passed the last screen and drains it to the lowest spout. It is bolted to the lower table, so it cannot turn.
A boiler-plate table that carries the frames above and the motor below; together they form the moving part of the machine.
Stainless steel springs with nylon spools carry the moving part on the base, so that the vibration stays in the screens and does not reach the floor.
A vertical vibratory motor hangs under the lower table. An eccentric weight on each end of its shaft makes the motion; the two weights are set for each material.
A round base rolled from boiler plate in one piece, with no welded joints, that stands on the floor and carries the springs.
An AlphaScreen works continuously. A vibratory motor under the screens moves the whole stack of frames in a three-dimensional motion, horizontal, vertical and tangential at once, while the base stays still on its springs. Every particle gets many chances to meet an opening in the mesh, so the machine sorts fine material in a small space. The diagram and the five steps below follow the material through a two-deck separator.
Material comes in through the inlet in the cover, or from a pipe over an open top, and lands at the centre of the top screen.
The top weight on the motor swings the screens in a horizontal circle and the bottom weight tilts them: the material spreads outward over the whole screen in a spiral.
Particles too big for the mesh ride over the screen to the rim and leave through that deck's spout.
What passes the top screen falls onto the next, finer screen and is sorted again. Every extra deck gives one more fraction.
What passes the last screen collects in the table frame and runs out through the lowest spout.
Material goes straight from the centre to the rim.
The whirlpool motion starts.
The longest whirlpool path over the screen.
Material gathers towards the centre.
Stainless steel frames and spouts, SS304 for every part in contact with the product, sand-blasted or polished. Top, spacing and table frames are joined with welds over the largest possible surface instead of end-to-end joins, so frames and spouts do not crack in mill service.
Clamp rings designed for day-to-day use in palm oil mills: a solid, reinforced 16 mm bolt and a 3 mm cap, where the usual separator clamp has a 9 mm bolt and a 2 mm cap.
The table frame is bolted to the lower table instead of clamped, so it stays secure without periodic re-tightening and cannot turn and crack its spout.
European-made vibratory motor with heavy-duty bearings and class F insulation, chosen so that it does not overheat or need rewinding. Long-arm eccentric weights give more vibration power than disc-type weights.
Direct drive: the weights sit on the motovibrator itself. Indirect drive (ID models), for mills far from town: an off-the-shelf motor and standard bearings that can be replaced from local stock, so the line restarts without waiting for parts from the maker.
The base support is rolled in one piece with no welded joints, for strength and an even transfer of the vibration; base and lower table weldment are built of boiler plate for a long life.
Our own welding and tensioning give screens of consistently high, even mesh tension: more throughput, longer screen life and less downtime for screen changes.
From a single deck up to four decks in one machine, with an open top or a cover with a central feed inlet, for one to five fractions in one pass.
Every AlphaScreen is run-tested before delivery: motor temperature, speed, current and voltage, and vibration amplitude. Built under our ISO 9001 quality system.
A round separator suits any dry material that must be split by particle size, and any liquid or slurry that must be cleared of coarse solids. Plants choose it when they want a compact machine that works continuously, sorts into several fractions at once, and lets the operator change a screen in minutes. These are the usual duties.
The main duty of the AlphaScreen. Oil from the screw presses, diluted with hot water, is screened to take out fibre, nut fragments and debris before the sand trap and the clarifier. The oil runs through the mesh; the solids leave at the rim.
Expeller oil from palm kernel, coconut and other seeds carries meal fines and foots. A separator takes out the coarse fines before the oil goes on to filtration.
Mixed juice from the mills is screened to remove bagacillo, the fine bagasse fibre, before clarification.
Field latex and latex concentrate are screened to take out lumps, skin and coagulum.
Check screening and grading of flour, sugar, starch, rice and soya products, dairy powders, tea and animal feed: lumps, foreign matter and fines are taken out, or the product is split into grades.
Safety screening and grading of synthetic resins, coating powders, pigments and dyes, fertiliser, soap and rubber chemicals, and of process liquids that must be free of lumps and gel.
Grading of silica sand and glass material, and screening of clay slip and glaze before use.
Removal of coarse solids from waste oils, recycling water and waste water before they are treated or reused.
Send the material or a sample, the flow, the cut you need and whether it is wet or dry, and we will tell you whether a round separator is the right tool, and with how many decks.
The same separator, with a different mesh and motion, also screens palm kernel oil in kernel crushing plants and juice in sugar mills.
For large tonnages see the AlphaScreen linear separator; for fine solids in oil, the LEAKPROOF pressure leaf filter.
The model number is the screen size in inches: AS48 is a 48-inch separator, and ID marks the indirect-drive version. Dimensions A to F are marked on the drawing. Larger machines, more decks and special outlets are built to order.
| Model | A (mm) | B (mm) | C (mm) | D (mm) | E (mm) | F (mm) | Power (HP) | Mesh surface (m²) |
|---|---|---|---|---|---|---|---|---|
| AS30 | 800 | 765 | 620 | 380 | 670 | 500 | 0.7 | 0.86 |
| AS48 | 1200 | 1220 | 970 | 540 | 876 | 755 | 2.5 | 1.12 |
| AS60 | 1500 | 1220 | 970 | 540 | 1085 | 755 | 2.5 | 1.73 |
| Model | A (mm) | B (mm) | C (mm) | D (mm) | E (mm) | F (mm) | Power (HP) | Mesh surface (m²) |
|---|---|---|---|---|---|---|---|---|
| AS48-ID | 1200 | 1505 | 1255 | 825 | 876 | 1040 | 4.0 | 1.12 |
| AS60-ID | 1500 | 1505 | 1255 | 825 | 1085 | 1040 | 4.0 | 1.73 |
| AS72-ID | 1800 | 1505 | 1255 | 825 | 1280 | 1040 | 5.5 | 2.54 |
Dimensions are for the deck arrangement on the drawing; the general arrangement drawing quoted for each order gives the exact heights, the outlet positions and the weights.
Every AlphaScreen is supported by our service teams in Johor, for Malaysia and Singapore, and in Jakarta, for Indonesia. The parts that wear or get damaged in mill service are made in our own works and kept in stock across the region.
New high-tension screens in stainless steel mesh, or your own screen rings re-meshed.
Stainless frame rings, here for 60-inch machines; each carries one screen deck and its spout.
Frame with a pan that guides what passes the screen above back to the centre of the screen below.
The bottom pan with the fines spout and the centre stud, bolted to the lower table.
Reinforced clamp rings with a 16 mm bolt and a 3 mm cap, here on a three-deck machine.
Springs with nylon spools carry the lower table on the base; centre tie-down and balance springs too.
Boiler-plate table on its springs; it carries the frames above and the motor below.
One-piece rolled base with the spring seats on its rim.
Vibratory motor in its base, seen from above, with the long-arm top weight.
For sorting dry powders and granules by particle size, for taking lumps and foreign matter out of a product, and for clearing liquids and slurries of coarse solids. In palm oil mills it screens the crude oil from the presses; in food, chemical, ceramic and recycling plants it grades powders, check-screens products and screens process liquids.
By the flow, the cuts you need and the material. The number of fractions sets the number of decks (one deck gives two products, four decks give five), and the flow and how easily the material passes the mesh set the screen diameter. Send us the material, the flow, the particle sizes you want to separate and whether it is wet or dry, and we will size it.
On a direct-drive AlphaScreen the eccentric weights sit on the vibratory motor itself. The indirect-drive (ID) models use an off-the-shelf motor and standard bearings, which mills far from town can replace from local stock and restart the line without waiting for parts from the maker.
With the two eccentric weights on the motor shaft: the angle between the top and bottom weights and the number of weight plates. A small angle sends the material straight to the rim for fast screening; a larger angle gives longer spiral paths for fine or difficult material. We set them at commissioning and can change them if the material changes.
It depends on the material, the mesh and how the screen is handled. High, even tension makes a screen last longer and screen more. When the mesh is worn or torn, the screen ring can be re-meshed in our works instead of buying a new screen; we have re-meshed more than 30,000 screens.
A set of screens for each deck, V-clamp rings, spring and spool assemblies and the spout sleeves cover normal operation. Mills that cannot stop keep a spare screen set and send the used screens to us for re-meshing.
Yes, for round separators of the common sizes. Our support and service team in Johor looks after Malaysia and Singapore, and our team in Jakarta looks after Indonesia, with screens and spare parts in stock across the region. Send the screen diameter, the mesh, photos of the screen ring and the frame, and the nameplate, and we will quote screens, re-meshing or parts.
Yes. Our support and service team in Johor covers Malaysia and Singapore, and our team in Jakarta covers Indonesia. They level and bolt down the machine, check the frame bolts and clamps, set the weights for the material, connect the spouts with flexible sleeves and check the motor and the motion before hand-over. Spare parts are kept in stock across the region, so replacements are close at hand.
Send us your duty, a drawing or a photo of your existing unit. A Peltech engineer will reply with options and a quotation.
