ECOMACCHINE S.p.A.Via Vandalino 6
10095 Grugliasco (TO)
Tel.: +39.0114028611
Fax: +39.0114028627
Email: ecomacchine@ecomacchine.it
Web: www.ecomacchine.it
COARSE AND FINE SCREENS
The first mechanical treatment of the waste water is the screening to remove any kind of bodies which could clog the pipings or damage the other equipments.
The screens are usually placed in the incoming flow channel, but they can be installed even out of the channel, downstream the lifting pumps.
We recommend, when possible, to protect the lifting pumps by means of mechanical fine screens for channels.
The screens can be manual or automatic, coarse or fine.
The coarse screening separates the bodies having a larger size than 20 mm.
The fine screening separates the bodies having a smaller size than 20 mm.
The most common spacings are 40 mm. for the coarse screens and 3 mm. for the fine screens.
The coarse screens are made of rectangular bars, installed in vertical.
Our range of production includes the following types of mechanical screens for channels:
Coarse screens
- Sub-vertical mechanical bar screen (downstream) with chains above water mod. EM 32A
- Vertical mechanical bar screen (countercurrent) with chains above water mod. EM 32AC
- Sub-vertical mechanical bar screen with chains above water and oil-pressure unit for rake control mod. EM 32H
- Sub-vertical mechanical bar screen with bucket and cable lifting device mod. EM 32D
- Sub-vertical mechanical bar screen with submerged chains mod. EM 32C
- Semi-rotary bar screen mod. EM34B
Fine screens
- Automatic fine screen with self-cleaning filtering elements in plastic material mod.EM31G
- Automatic inclined fine screen with fixed basket and screw compactor mod. EM31C
- Automatic rotating band screen mod. EM31E
The following screens are installed outside the channels:
Fine screens
Rotary drum screen mod. EM79
ULTRASCREEN for belt filtration mod. EM100G
ACCESSORIES
Compattatori per grigliato
Compactors for screened material
Screw compactor mod. EM56
Screw and Belt Conveyors
CALCULATION OF THE HEAD LOSS
Among the phenomena of backed up outflow, we have also the passage through bar screens (the bars length is placed in the stream flowing direction). The bars may have different sections and angles of inclination (α) on the horizontal line (Picture FG1). The head loss through a bar screen is determined by means of the KIRSHMER’s formula:
where:
- v : water velocity without the bar screen;
- α: angle of inclination of the bar screen on the horizontal line;
- d : bars thickness;
- a: spacing between the bars;
- β: coefficient of shape, function of the bar section, as shown in the picture.
Basically, the value:
represents a head loss which causes a “backup” of water upstream or downstream the bar screen, according to whether the stream speed is slow or fast. The result is valid for a clean bar screen, while for a clogged bar screen the head loss is remarkably higher.
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Indicative values of the head losses through mechanical bar screens having different spacings and an inclination of 60°
SUB-VERTICAL MECHANICAL BAR SCREEN (DOWNSTREAM) WITH CHAINS ABOVE WATER
Mod. EM32A
| Application | Screening of civil and industrial waste water |
| Characteristics | The machine is equipped with a fixed bar screen and movable cleaning rake driven by chains installed above the water level. |
| Operation | The coarse bodies in the waste water are stopped by the bar screen.
This material is removed by the cleaning rake and discharged in the upper part, out of water. The rake is guided by two lateral trolleys which are driven by two transmission chains. |
| Materials | Compact machine: hot dip galvanized carbon steel or stainless steel. The chains and the moving parts are always above the water level. |
| Installation | In a concrete channel. |
| Channel width | From 1000 to 2500 mm. |
| Degree of filtration | From 20 to 80 mm. |
| Advantages | Chains and moving parts above the water level |
| Optional | Torque limiting device to measure the cleaning rake stress with alarm and/or machine shutdown. Walkway and ladder to reach the top mechanical members. |
Operation description
The machine operation is controlled by a Pause-ON timer.
If the water level upstream the mechanical bar screen should increase and exceed a pre-set threshold, a level measurer can start the machine, even during the pause phase.
The machine stop and the beginning of the pause phase is possible only whether the cleaning rake has reached a pre-set position out of water and the material collected has been discharged.
The machine is operated by a geared motor which moves the cleaning rake.
During the lowering phase, the cleaning rake is in open position and remains open as far as the lowest position is reached.
When the cleaning rake reaches the bottom of the channel, the chain makes the rake get closer to the bar screen.
So during the lifting phase, the rake cleans the bars and holds the screened material inside.
Before the cleaning rake reaches the top position, a special device cleans its internal part and discharges the material outside, into a container or on a belt conveyor.
At the top, a limit switch controls the cleaning rake operation.
Technical and dimensional data necessary to make a quotation:
| 1.1 | Design flow rate in the channel | :m³/h | |
| 1.2 | Max. flow rate in the channel | :m³/h | |
| 1.3 | Water max. level downstream the bar screen | :mm. | |
| 1.4 | Water max. level upstream the bar screen | :mm. | |
| 1.5 | Channel width | :mm. | |
| 1.6 | Channel height | :mm. | |
| 1.7 | Discharge elevation from the channel bottom | :mm. | |
| 1.8 | Spacing between the bars | :mm. |
It is also necessary that you mention the required materials of construction.
VERTICAL MECHANICAL BAR SCREEN (COUNTERCURRENT) WITH CHAINS ABOVE WATER
Mod. EM32AC
| Application |
Screening of civil and industrial waste water. Screening of water for hydroelecgtric power plants. Screening of water for land reclamation works. |
| Characteristics | The machine is equipped with a fixed bar screen and movable cleaning rake driven by chains installed above the water level. |
| Operation | The coarse bodies in the waste water are stopped by the bar screen. This material is removed by the cleaning rake and discharged in the upper part, out of water. The rake is guided by two lateral trolleys which are driven by two transmission chains. |
| Materials | Compact machine: hot dip galvanized carbon steel or stainless steel. The chains and the moving parts are always above the water level. |
| Installation | In a concrete channel. |
| Channel width | From 1000 to 2500 mm. |
| Degree of filtration | From 20 to 80 mm. |
| Advantages | Chains and moving parts above the water level |
| Optional | Torque limiting device to measure the cleaning rake stress with alarm and/or machine shutdown. Walkway and ladder to reach the top mechanical members. |
Operation description
The machine operation is controlled by a Pause-ON timer.
If the water level upstream the mechanical bar screen should increase and exceed a pre-set threshold, a level measurer can start the machine, even during the pause phase.
The machine stop and the beginning of the pause phase is possible only whether the cleaning rake has reached a pre-set position out of water and the material collected has been discharged.
The machine is operated by a geared motor which moves the cleaning rake.
During the lowering phase, the cleaning rake is in open position and remains open as far as the lowest position is reached.
When the cleaning rake reaches the bottom of the channel, the chain makes the rake get closer to the bar screen.
So during the lifting phase, the rake cleans the bars and holds the screened material inside.
Before the cleaning rake reaches the top position, a special device cleans its internal part and discharges the material outside, into a container or on a belt conveyor.
At the top, a limit switch controls the cleaning rake operation.
Technical and dimensional data necessary to make a quotation:
| 1.1 | Design flow rate in the channel | :m³/h | |
| 1.2 | Max. flow rate in the channel | :m³/h | |
| 1.3 | Water max. level downstream the bar screen | :mm. | |
| 1.4 | Water max. level upstream the bar screen | :mm. | |
| 1.5 | Channel width | :mm. | |
| 1.6 | Channel height | :mm. | |
| 1.7 | Discharge elevation from the channel bottom | :mm. | |
| 1.8 | Spacing between the bars | :mm. |
It is also necessary that you mention the required materials of construction.
SUB-VERTICAL MECHANICAL BAR SCREEN WITH CHAINS ABOVE WATER AND OIL-PRESSURE UNIT FOR RAKE CONTROL
Mod. EM32H
| Application | Screening of civil and industrial waste water |
| Characteristics | The machine is equipped with a fixed bar screen and a cleaning rake controlled by an oil-pressure cylinder. |
| Operation | The coarse bodies in the waste water are stopped by the bar screen. This material is removed by the cleaning rake and discharged in the upper part, out of water. The rake is guided by two lateral trolleys which are driven by two transmission chains. The rake engagement and disengagement is controlled by an oil-pressure cylinder. |
| Materials | Compact machine: hot dip galvanized carbon steel or stainless steel. The control parts are always above the water level. |
| Installation | In a concrete channel. |
| Channel width | From 1000 to 3500 mm. |
| Degree of filtration | From 20 mm to 80 mm. |
| Advantages | Moving/control parts above the water level, high force of penetration of the cleaning rake. |
| Optional | Torque limiting device to measure the cleaning rake stress with alarm and/or machine shutdown. Walkway and ladder to reach the top mechanical members. |
Operation description
The machine operation is controlled by a Pause-ON timer.
If the water level upstream the mechanical bar screen should increase and exceed a pre-set threshold, a level measurer can start the machine, even during the pause phase.
The machine stop and the beginning of the pause phase is possible only whether the cleaning rake has reached a pre-set position out of water and the material collected has been discharged.
The machine is operated by a geared motor which moves the cleaning rake (lifting and lowering) and an oil-pressure unit for a strong engagement and disengagement of the rake.
During the lowering phase, the cleaning rake is in open position and remains open as far as the lowest position is reached.
When the cleaning rake reaches the bottom of the channel, a limit switch stops it.
The oil-pressure piston makes the rake get deeply into the spaces between bars, then the geared motor receives a re-start signal and lifts the cleaning rake to the discharge point.
The piston is equipped with two internal proximity sensors which allow the total use of its stroke.
During the lifting phase, the rake cleans the bars and holds the screened material inside.
Before the cleaning rake reaches the top position, a special device cleans its internal part and discharges the material outside, into a container or on a belt conveyor.
At the top, a limit switch stops the motor and reverses the motion to make the cleaning rake go down again.
Meanwhile, the oil-pressure cylinder has taken the rake out of the screen.
Technical and dimensional data necessary to make a quotation:
| 1.1 | Design flow rate in the channel | :m³/h | |
| 1.2 | Max. flow rate in the channel | :m³/h | |
| 1.3 | Water max. level downstream the bar screen | :mm. | |
| 1.4 | Water max. level upstream the bar screen | :mm. | |
| 1.5 | Channel width | :mm. | |
| 1.6 | Channel height | :mm. | |
| 1.7 | Discharge elevation from the channel bottom | :mm. | |
| 1.8 | Spacing between the bars | :mm. |
It is also necessary that you mention the required materials of construction.
SUB-VERTICAL MECHANICAL BAR SCREEN WITH BUCKET AND CABLE LIFTING DEVICE
Mod. EM32D
| Application | Screening of civil and industrial waste water |
| Characteristics | The machine is equipped with a fixed bar screen and a bucket controlled by two drive units, one for the vertical motion and one for the opening and closing. |
| Operation | The coarse bodies in the waste water are stopped by the bar screen. This material is removed by the moving bucket and discharged in the upper part, out of water. The bucket is guided by two trolleys which are driven by two cable systems (one for the vertical motion and one for the opening and closing). |
| Materials | Compact machine: hot dip galvanized carbon steel or stainless steel. The control parts are always above the water level. |
| Installation | In a concrete channel. |
| Channel width | From 1000 to 3000 mm. |
| Degree of filtration | From 15 to 100 mm. |
| Advantages | Suitable for very deep channels, even with sand on the bottom and/or large size solids. |
| Disadvantages | Not suitable for small or shallow channels. |
| Optional | Torque limiting device to measure the bucket/rake stress with alarm and/or machine shutdown. Walkway and ladder to reach the top mechanical members. |
Operation description
The machine operation is controlled by a Pause-ON timer.
If the water level upstream the mechanical bar screen should increase and exceed a pre-set threshold, a level measurer can start the machine, even during the pause phase.
The machine stop and the beginning of the pause phase is possible only whether the bucket has reached a pre-set position out of water and the material collected has been discharged.
The machine is controlled by no. 2 geared motors, one for the bucket lifting and lowering and the second one for its engagement into the bar screen and then for its disengagement.
In the drive unit upper part, there are no. 3 drums (no. 2 side drums + no. 1 central drum). They are driven by a geared motor and they wind and unwind the cables which lift and lower the screening bucket/rake.
The second geared motor operates a pulley which controls the bucket/rake operation by winding and unwinding the central cable.
During the lowering phase, the bucket is in open position and remains open as long as the lowest position is reached.
When the bucket lays on the bottom, the traction cable is loosened and a limit switch intervenes to stop the motor (this limit switch is connected to the cable).
Then, the first geared motor rotation direction is reversed, the second geared motor starts up to wind the central cable and the bucket/rake is inserted into the bar screen.
So the bucket/rake is lifted again and during the lifting phase it cleans the bar screen and holds the screened material inside.
Before the bucket gets to the top position, it is cleaned by a special device and the screened material is discharged outside, into a container or on a belt conveyor.
At the top, a limit switch stops the motor and reverses the motion to make the bucket go down again.
Meanwhile, the second geared motor moves the central drum which separates the screening rake from the bar screen.
During the lowering phase, the bucket/rake remains far from the bar screen.
Technical and dimensional data necessary to make a quotation:
| 1.1 | Design flow rate in the channel | :m³/h | |
| 1.2 | Max. flow rate in the channel | :m³/h | |
| 1.3 | Water max. level downstream the bar screen | :mm. | |
| 1.4 | Water max. level upstream the bar screen | :mm. | |
| 1.5 | Channel width | :mm. | |
| 1.6 | Channel height | :mm. | |
| 1.7 | Discharge elevation from the channel bottom | :mm. | |
| 1.8 | Spacing between the bars | :mm. |
It is also necessary that you mention the required materials of construction.
SUB-VERTICAL MECHANICAL BAR SCREEN WITH SUBMERGED CHAINS
Mod. EM32C
| Application | Screening of civil and industrial waste water |
| Characteristics | The machine is equipped with a fixed bar screen and one or more movable cleaning rakes driven by chains. |
| Operation | The coarse bodies in the waste water are stopped by the bar screen. This material is removed by one or more cleaning rakes and discharged in the upper part, out of water. The rake is moved by two transmission chains, partially submerged in the water to be treated. |
| Materials | Compact machine: hot dip galvanized carbon steel or stainless steel. The chains are always made of stainless steel. |
| Installation | In a concrete channel. |
| Channel width | From 500 to 1500 mm. |
| Degree of filtration | From 10 to 80 mm. |
| Advantages | Low cost, possibility of using more cleaning rakes. |
| Disadvantages | Difficoltà ad asportare solidi di dimensioni superiori a 300 mm. |
| Optional | Torque limiting device to measure the cleaning rake stress with alarm and/or machine shutdown. |
Operation description
The machine operation is controlled by a Pause-ON timer.
If the water level upstream the mechanical bar screen should increase and exceed a pre-set threshold, a level measurer can start the machine, even during the pause phase.
The machine stop and the beginning of the pause phase is possible only whether the cleaning rake has reached a pre-set position out of water and the material collected has been discharged.
The machine is operated by a geared motor which moves the cleaning rake.
During the lowering phase, the cleaning rake is in open position and remains open as far as the lowest position is reached.
When the cleaning rake reaches the bottom of the channel, the chain makes the rake get closer to the bar screen.
So during the lifting phase, the rake cleans the bars and holds the screened material inside.
Before the cleaning rake reaches the top position, a special device cleans its internal part and discharges the material outside, into a container or on a belt conveyor.
At the top, a limit switch controls the cleaning rake operation.
Technical and dimensional data necessary to make a quotation:
| 1.1 | Design flow rate in the channel | :m³/h | |
| 1.2 | Max. flow rate in the channel | :m³/h | |
| 1.3 | Water max. level downstream the bar screen | :mm. | |
| 1.4 | Water max. level upstream the bar screen | :mm. | |
| 1.5 | Channel width | :mm. | |
| 1.6 | Channel height | :mm. | |
| 1.7 | Discharge elevation from the channel bottom | :mm. | |
| 1.8 | Spacing between the bars | :mm. |
It is also necessary that you mention the required materials of construction.
SEMI-ROTARY BAR SCREEN
Mod. EM34B
| Application | Screening of civil and industrial waste water |
| Characteristics | The machine is equipped with a semi-circular fixed bar screen and a cleaning rake with alternate motion. |
| Operation | The coarse bodies in the waste water are stopped by the bar screen. This material is removed by the cleaning rake which scrapes the bar screen during the cleaning phase. |
| Materials | Compact machine: hot dip galvanized carbon steel or stainless steel. |
| Installation | In a concrete channel. |
| Channel width | From 1000 to 2000 mm. |
| Degree of filtration | From 20 to 80 mm. |
| Optional | Electromagnetic coupling with alarm sensor. |
Operation description
The machine operation is controlled by a Pause-ON timer.
If the water level upstream the mechanical bar screen should increase and exceed a pre-set threshold, a level measurer can start the machine, even during the pause phase.
The machine stop and the beginning of the pause phase is possible only whether the cleaning rake has reached a pre-set position out of water and the material collected has been discharged.
The machine is operated by a geared motor which moves the cleaning rake.
During the lifting phase, the rotary rake cleans the bars and holds the screened material as far as the discharge elevation is reached.
Before the cleaning rake reaches the top position, a special device cleans its internal part and discharges the material outside, into a container or on a belt conveyor.
When the cleaning rake reaches the bottom of the channel, it gets closer to the bar screen.
At the top, a limit switch controls the cleaning rake operation.
Technical and dimensional data necessary to make a quotation:
| 1.1 | Design flow rate in the channel | :m³/h | |
| 1.2 | Max. flow rate in the channel | :m³/h | |
| 1.3 | Water max. level downstream the bar screen | :mm. | |
| 1.4 | Water max. level upstream the bar screen | :mm. | |
| 1.5 | Channel width | :mm. | |
| 1.6 | Channel height | :mm. | |
| 1.7 | Discharge elevation from the channel bottom | :mm. | |
| 1.8 | Spacing between the bars | :mm. |
It is also necessary that you mention the required materials of construction.
AUTOMATIC FINE SCREEN WITH SELF-CLEANING FILTERING ELEMENTS IN PLASTIC MATERIAL
Mod. EM31G
| Application | Screening of civil and industrial waste water |
| Characteristics | The machine is equipped with a filtering continuous belt made of acetalic resin elements (teeth+rollers) and stainless steel shafts. Cleaning brush and washing system. |
| Operation | The waste water containing suspended particles goes through the filtering elements which hold the material in suspension. This material is lifted and removed by a rotary cleaning brush and a washing system. |
| Materials | Compact machine: stainless steel. |
| Installation | In a concrete channel. |
| Channel width | From 300 to 2000 mm. |
| Degree of filtration | 3 or 6 mm. |
| Advantages | Continuous filtration, suitable even for water containing filaments of fibers. |
| Disadvantages | Not suitable to remove solid materials larger than 250 mm.. |
| Optional | Electromagnetic coupling with alarm sensor. Double cleaning brush (motorized). |
Operation description
The machine operation is controlled by a Pause-ON timer.
If the water level upstream the filtering screen should increase and exceed a pre-set threshold, a level measurer can start the machine, even during the pause phase.
The filtering belt lifts continuously the solids held by the plastic material elements.
At the top, the screened material is discharged thanks to the teeth movement, a rotary brush and two washing systems which furtherly take off the screened material.
Structural peculiarities
Rollers
The grit in the water may wear the rollers placed on the cleaning teeth supporting shafts sides. The rollers shafts are protected against wear by some bushes fixed to the shafts. The rollers are made of plastic material, are low cost as mass-produced and can be easily replaced.
Guides
The sliding guides for the chains are bolted to the frame and can be easily replaced.
Technical and dimensional data necessary to make a quotation:
| 1.1 | Design flow rate in the channel | :m³/h | |
| 1.2 | Max. flow rate in the channel | :m³/h | |
| 1.3 | Water max. level downstream the bar screen | :mm. | |
| 1.4 | Water max. level upstream the bar screen | :mm. | |
| 1.5 | Channel width | :mm. | |
| 1.6 | Channel height | :mm. | |
| 1.7 | Discharge elevation from the channel bottom | :mm. | |
| 1.8 | Spacing between the filtering elements | :mm. |
The materials of construction used are: stainless steel for the frame and shafts; acetalic resin for the filtering teeth and the rollers.
AUTOMATIC INCLINED FINE SCREENWITH FIXED BASKET AND SCREW COMPACTOR
Mod. EM31C
| Application |
Screening of civil and industrial waste water. Screening of process water within industrial cycles. |
| Characteristics | The machine is equipped with a fixed basket made of trapezoidal bars or perforated plate, a lifting screw with cleaning brushes, a compactor and a washing system for the screened material. |
| Operation | The waste water containing suspended particles goes through the filtering basket which holds the material in suspension. This material is lifted and removed by a screw equipped with cleaning brushes on the profile in contact with the basket. The screened material is washed by washing ramps, located in three different positions. |
| Materials | Compact machine: stainless steel. |
| Installation | In a concrete or stainless steel channel |
| Channel width | From 370 to 750 mm. |
| Degree of filtration | From 0.5 to 10 mm. |
| Advantages | Continuous filtration, suitable even for water containing filaments of fibers. |
| Disadvantages | Not suitable to remove solid materials larger than 250 mm |
Operation description
The machine operation is controlled by a Pause-ON timer.
If the water level upstream the filtering screen should increase and exceed a pre-set threshold, a level measurer can start the machine, even during the pause phase.
The water to be treated is filtered by the fixed basket and the solids held are lifted, compacted and discharged by a screw.
During the lifting, the screened material is washed to remove the soluble organic substances.
Technical and dimensional data necessary to make a quotation:
| 1.1 | Design flow rate in the channel | :m³/h | |
| 1.2 | Max. flow rate in the channel | :m³/h | |
| 1.3 | Water max. level downstream the bar screen | :mm. | |
| 1.4 | Water max. level upstream the bar screen | :mm. | |
| 1.5 | Channel width | :mm. | |
| 1.6 | Channel height | :mm. | |
| 1.7 | Discharge elevation from the channel bottom | :mm. | |
| 1.8 | Spacing of filtration | :mm. |
The material of construction used is normally stainless steel.
AUTOMATIC ROTATING BAND SCREEN
Mod. EM31E
| Application | Screening of civil and industrial waste water. |
| Characteristics | The machine is equipped with panels of filtering band, a screw compactor and washing system for the screened material. |
| Operation | The waste water containing suspended particles goes through the filtering band panels which hold the material in suspension. Then this material is discharged into a screw compactor thanks to a washing ramp. |
| Materials | Compact machine: stainless steel. |
| Installation | In a concrete channel. |
| Channel width | From 600 to 2800 mm. |
| Degree of filtration | From 0.25 to 1 mm. |
| Advantages | Continuous filtration, suitable even for water containing filaments of fibers.. |
| Disadvantages | Not suitable to remove solid materials larger than 200 mm. |
Operation description
The machine operation is controlled by a Pause-ON timer. If the water level upstream the filtering screen should increase and exceed a pre-set threshold, a level measurer can start the machine, even during the pause phase. The machine is operated by a geared motor which controls the filtering band rotation. The filtration process occurs from inside to outside on both sides of the filtering belt, both during the lifting and lowering phases. During the lifting, the screened material is lifted and discharged into a hopper equipped with a screw compactor. During the discharge phase, the band is washed in countercurrent.
Technical and dimensional data necessary to make a quotation:
| 1.1 | Design flow rate in the channel | :m³/h | |
| 1.2 | Max. flow rate in the channel | :m³/h | |
| 1.3 | Water max. level downstream the bar screen | :mm. | |
| 1.4 | Water max. level upstream the bar screen | :mm. | |
| 1.5 | Channel width | :mm. | |
| 1.6 | Channel height | :mm. | |
| 1.7 | Discharge elevation from the channel bottom | :mm. | |
| 1.8 | Spacing of filtration | :mm. |
The material of construction used is normally stainless steel for the machine and polyester for the belt.
ROTARY DRUM SCREEN
Mod. EM79
| Utilizzo | Screening of civil and industrial waste water. |
| Characteristics | The machine consists of a rotary drum. |
| Operation | The coarse solids are retained and remain outside the rotary drum. Then this material is removed by a cleaning scraper and the drum is washed by a washing system located inside the drum. |
| Materials | Compact machine: stainless steel. |
| Installation | Out of the channel. |
| Diametro del tamburo | 628 or 920 mm |
| Lunghezza del tamburo | From 500 to 3000 mm |
| Degree of filtration | From 0,25 to 3 mm. |
| Disadvantages | Cleaning brush. |
Operation description
The machine operation is controlled by a Pause-ON timer.
If the water level in the tank of the water to be treated should increase and exceed a pre-set threshold, a level measurer can start the machine, even during the pause phase.
The water to be treated goes to the feed tank and is distributed all over the drum surface.
The machine is operated by a geared motor which controls its rotation.
The filtration process occurs from outside to inside the drum, so the filtered water comes out from inside the drum and keeps it continuously clean.
The solid material which remains outside the drum is scraped by a cleaning scraper which can be helped by a motorized brush which can be provided as an optional accessory.
The feeding is made by gravity or by means of a pump.
Technical and dimensional data
Table of capacities (m3>/h) with a quantity of SST = 200 ppm
| Spacing of filtration | |||||||||
| Model | 0,25 | 0,5 | 0,75 | 1,0 | 1,25 | 1,5 | 2 | 2,5 | 3 |
| EM79-6005 | 45 | 80 | 105 | 125 | 140 | 155 | 180 | 195 | 210 |
| EM79-6006 | 55 | 95 | 125 | 150 | 170 | 190 | 210 | 235 | 250 |
| EM79-6007 | 65 | 110 | 150 | 180 | 200 | 220 | 250 | 280 | 300 |
| EM79-6008 | 75 | 125 | 170 | 205 | 230 | 255 | 290 | 320 | 340 |
| EM79-6010 | 90 | 160 | 215 | 260 | 290 | 320 | 370 | 405 | 430 |
| EM79-6015 | 135 | 240 | 325 | 395 | 450 | 490 | 555 | 610 | 650 |
| EM79-6020 | 180 | 300 | 435 | 530 | 590 | 650 | 750 | 820 | 870 |
| EM79-9030 | 435 | 740 | 980 | 1250 | 1450 | 1650 | 1850 | 2150 | 2350 |
ULTRASCREEN FOR BELT FILTRATION
Mod. EM100/G
| Application | Screening of civil and industrial waste water. |
| Characteristics | The machine is equipped with a continuous-cycle filtering belt. |
| Operation | The coarse solids are retained by the belt and discharged into a container, out of the machine. The belt is brushed and washed with water. |
| Materials | Compact machine: stainless steel. |
| Installation | Out of the channel. |
| Belt width | 1200 – 2100 – 3000 mm |
| Degree of filtration | From 150 microns to 2 mm.. |
| Advantages | Continuous filtration, suitable for water containing grease, filaments of fibers and any substances which tend to clog the normal rotary drum screens. |
| Opzioni | High pressure washing system.e |
Operation description
The machine operation is controlled by a Pause-ON timer.
According to the type of application, the machine operation can be controlled by a level measurer placed in the feed tank or by a sensor in the feed or drain pipe.
The water to be treated goes to the feed tank and is distributed all over the belt surface.
The machine is operated by a geared motor which controls its rotation.
The filtration occurs by gravity and the solid material retained by the filtering belt is removed by a system of motorized rotary brushes. After the removal of the retained material, the belt is washed in continuous by means of a washing system using water. This keeps the belt always clean.
The feeding is made by gravity or by means of a pump.
Technical and dimensional data necessary to make a quotation:
| 1.1 | Feed flow rate | : m³/hr | |||
| 1.1 | Suspended solids in the water to be treated | : p.p.m. | |||
| 1.2 | Minimum size of the solids to be separated | : micron | |||
| 1.3 | Model to be used | : EM | 100/1200 | 100/2100 | 100/3000 |
| 1.4 | Filtering belt width | : mm | 1200 | 2100 | 3000 |
| 1.5 | Filtering belt speed | : mt/min. | 1,6-8,5 | 1,6-8,5 | 1,6-8,5 |
| 1.6 | Maximum opening of the filtering meshes | : micron | |||
| Services required | |||||
| Wash water | |||||
| 1.7 | Flow rate | : m3/hr | 1,2 | 2 | 3 |
| 1.8 | Head | : Bar | 20 | 20 | 20 |
| Compressed air | |||||
| 1.9 | Flow rate | : lt/min. | 250 | 250 | 250 |
| 1.10 | Pressure | : Bar | 7 | 7 | 7 |
| Electric equipments | |||||
| 1.11 | Belt drive | : Kw 0,55 | 0,75 | 1,5 | |
| 1.12 | Cleaning brush | : Kw | 0,37 | 0,37 | 0,37 |
| 1.13 | High pressure water pump (optional) | : Kw | 4 | 5,5 | 7,5 |
| 1.14 | Air compressor | : Kw | 2,2 | 2,2 | 2,2 |
| 1.15 | Submersible pump for washwater evacuation | : Kw 0,55 | 0,75 | 1,1 | |
The material of construction used is normally stainless steel.
CONVEYING PRESS WITH OIL-PRESSURE PISTON
Mod. EM86
| Application | Screened material conveying and compaction. |
| Characteristics | The machine is equipped with a load chamber with piston, a compactor and discharge pipe and an oil-pressure unit. |
| Operation | The screened material is collected in the load chamber, the piston has an alternative movement, during the forward stroke it compacts and conveys the material into the discharge pipe. |
| Materials | Compact machine: stainless steel. |
| Installation | Out of the channel. |
| Diametro del pistone | 250 mm or 350 mm |
Technical and dimensional data:
| 1.1 | Conveying Press | |||
| 1.1.1 | Capacity | : mc/h. | 1,8 | 2,7 |
| 1.1.2 | Cylinder diameter | : mm. | 250 | 350 |
| 1.1.3 | Max. specific pressure | :kg/cmq | 15 | 10 |
| 1.1.4 | Feed inlet size | : mm. | 500x350 | 600x450 |
| 1.1.5 | Compacted material outlet flange | : DN | 250 | 350 |
| 1.1.6 | Separated water drainage flange | : “ | 2 | 2 |
| 1.1.7 | Material | : AISI | 304 | 304 |
| 1.2 | Oil-Pressure Unit | |||
| 1.2.1 | Power | : kW | 4 | 5,5 |
| 1.2.2 | Pump capacity | : lt/1’ | 8 | 10 |
| 1.2.3 | Oil tank capacity | : lt. | 60 | 60 |
| 1.2.4 | Max. push pressure | : BAR | 200 | 200 |
| 1.3 | Piston | |||
| 1.3.1 | Bore | :mm | 80 | 100 |
| 1.3.2 | Stroke | :mm | 700 | 700 |
| 1.3.3 | Stem diameter | :mm | 40 | 60 |
| 1.3.3 | Force at a pressure of 200 bar. | : kg. | 7.400 | 9700 |
SCREW COMPACTOR
Mod. EM56F
| Application | Screened material conveying and compaction. |
| Characteristics | The machine is equipped with a conveying screw and a compacting unit. |
| Operation | The screened material is conveyed in the compacting unit by the screw, the separated water returns to the channel. |
| Materials | Compact machine: stainless steel. |
| Installation | Out of the channel. |
| Lunghezza della spirale | Variable |
Operation description
The screened material is conveyed by the screw to the compacting unit equipped with a draining basket and a discontinuous washing. Then it is compacted and discharged. The drained water returns to the channel.
Technical and dimensional data
| 1.1 | Machine channel width | : mm. | 225 |
| 1.2 | Screw external diameter | : mm. | 180 |
| 1.3 | Screw internal diameter | : mm. | 105 |
| 1.4 | Capacity | : m3/h | 2 |
| 1.5 | Slope | : ° | 5° |
| 1.6 | Screw number of revolutions | : r.p.m. | 28 |
| 1.7 | eened material elevation discharge | : mm. | |
| 1.8 | Screw length | : mm. | |
| 1.9 | Total length | : mm. | |
| 1.10 | Washwater flow rate | : mc/h | 1-2 |
| 1.11 | Power | : Kw. | 1,5 |
| 1.12 | Tension | : V-f-Hz | 380-3-50 |
| 1.13 | Motor protection | : IP | 55 |
The material of construction used is normally stainless steel.