MultiGrade Filter
Better filtrate quality at higher flow rates and lowest cost
The Multigrade filter is a depth filter that makes use
Of coarse and fine media mixed together in a fixed proportion.
This arrangement produces a filter bed with adequate pore dimensions
For retaining both large and small suspended particles. This filter performs
At a substantially higher specific flow rate than conventional filters. Specific
Flow rates of 15 – 30 m/h have been successfully obtained for treating water containing 50 - 25 ppm suspended solid respectively to produce a filtrate with less than 5 ppm
Special Features
- Higher specific velocity
- Raw water can be used for backwashing the filter
Advantages
- Higher specific flow rate than conventional down flow filter thereby Saving on space and cost
- Very little maintenance required
- Lower backwash water requirement
- In most cases raw water can be used for backwash
Application
The Multigrade Filter is an ideal choice for all application Where a conventional sand filter is used .It is extensively used in Side stream filtration of cooling water and in potable water treatment. It is ideal for filtration of clarified water .In addition it finds application In sea water filtration and infiltration of chemical solution. For These type Of filtration, rubber lined or epoxy painted filter can be offered.
Flow Rate Data (m3/h)
| Model Number | Feed water suspended solid | |
| 25ppm | 50ppm | |
| MF-600 | 8 | 4 |
| MF-800 | 15 | 7 |
| MF-1000 | 23 | 12 |
| MF-1200 | 33 | 16 |
| MF-1400 | 46 | 23 |
| MF-1600 | 60 | 30 |
| MF-1800 | 76 | 38 |
| MF-2000 | 94 | 47 |
| MF-2200 | 113 | 56 |
| MF-2400 | 135 | 67 |
| MF-2600 | 159 | 79 |
| MF-2800 | 184 | 92 |
| MF-3000 | 212 | 105 |
New Generation
Manual &auto Multi Grade filter (NGMF)
New generation Multigrade filter (NFMG) series remove suspended solid from feed water .They also remove turbidity provide the feed water has already been coagulated and clarified. Filters are designed to handle a maximum flow of 35 m3/h.
Features
- NGMF series of Multi Grade Filter is aesthetically designed, light weight and easy to install and maintain. It does not require any special foundation
- Specially graded coarse and fine sand is used as filter media which permits handling larger linear flow rate as compared to conventional single media filter resulting in lower footprint
- The entire unite is made up of plastic material pressure vessels is made of fibre reinforced plastic (FRP) and pipe work is of poly vinyl chloride(PVC)
- Filter is fitted with a single Multi-port valve to be operated by hand lever for ease of operation
- Filter is backwashed by reversal of flow whenever the pressure drop across the unite exceeds the set limit.
Application
- Multi Grade Filter are used as last step in the pretreatment of surface water for removed of the last trace of suspended solid (SS) and turbidity present in clarified water
- Multi Grade Filter are also use as side stream filters for removal of suspended solid in cooling tower recirculation water
- Pretreatment of feed water to membrane systems
- Pretreatment for mineral water bottling plants
- Swimming pool water filtration
- Drinking water supplies
Technical specification
| Model | NGMF 20 | NGMF 30 | NGMF 40 | NGMF 60 | NGMF 85 | NGMF 135 | NGMF 195 | NGMF 270 | NGMF 350 |
| Max flow(m3/h) | 2.0 | 3.0 | 4.0 | 6.0 | 8.5 | 13.5 | 19.5 | 27.0 | 35.0 |
| Connections with unions (mm) inlet/outlet | 32/32 | 50/50 | 50/50 | 50/50 | 50/50 | 63/63 | 63/63 | 90/90 | 90/90 |
| Max working Pressure (kg/cm2) | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 |
| Dimensions vessels Dia (mm) | 305 | 355 | 400 | 550 | 610 | 770 | 927 | 1074 | 1226 |
| Vessel Height(mm) | 1236 | 1659 | 1671 | 1735 | 2163 | 2336 | 2336 | 2292 | 2470 |
Note:
Multi Grade Filters (Model no. NGMF 20 to 195) are fitted with a multi-port valve operated by a hand lever
Multi Grade filter (Model no .270 and NGMF 350) are fitted with individual butterfly valve with a hand operated lever.
Automation of Multi grade filter is carried out using programmable logic controller (PLC) that engineer a set of solenoid valves which in turn operate the butterfly control valve located on the unite.
Activated carbon Filers
The Activated carbon filter are intended to remove free residual chlorine (FRC) present in feed water .Granular activated carbon is used as the filter media.
A range of carbon filter are available to treat feed water up to 170m3/h
For removed of odour, organic matter and traces of oil ,peat based activated carbon with larger pore size can be supplied on request
Pressure vessels are designed as per IEI good engineering practice. Vessels confirming to ASME sec.VIII can be supplied on request .Pressure vessels are of MS, MSRL or SS 316 construction. Frontal pipe work is available in PVC, MS,MSRL or SS316
Features
- • Filter are compact and easy to install and maintain
- • The filter can tolerate any variation or shock loads in free residual chlorine unlike chemical dosing system which require constant monitoring and adjustment of dosages
- • Pressure Gauge at inlet and outlet are provided to measure pressure gauges across the unit .Filter backwash is carried out by reversal of flow
Application
- Activated carbon filter are used in all application like deminerlising And reverse osmosis units that require removal of free residual chlorine present in feed water
- For removal of traces of oil, organic matter,colour and odour, special grades of carbon can be supplied on request
Technical specification
| Model Number | Maximum Flow(m3/h) |
| ACF-600 | 6.8 |
| ACF-800 | 12 |
| ACF-1000 | 18.5 |
| ACF-1200 | 27 |
| ACF-1400 | 37 |
| ACF-1600 | 48 |
| ACF-1800 | 61 |
| ACF-2000 | 75 |
| ACF-2200 | 91 |
| ACF-2400 | 108 |
| ACF-2600 | 127 |
| ACF-2800 | 148 |
| ACF-3000 | 170 |
Maximum/minimum operating -3.5kg/cm2g and 2.0kg/cm2g respectively
Note: Feed water should be clear and free from suspended solid and turbidity.
Custom built activated carbon filter designed for higher operating pressure and higher flow rate can be supplied on request.
The filter media needs to be replaced with fresh activated carbon when the free residual chlorine (FRC) at the outlet of filter shows a positive value
New Generation
Auto & manual carbon Filters
New Generation activated Filters (NGMA) are intended to remove free residual chlorine (FRC) from feed water. Granular Activated carbon is used as filter media. For removal of trace of oil, organic matter &odour, special grades of carbon –based on Iodine value can be supplied on request
The pressure vessel is made of Fibre Reinforced plastic (FRP).Pipe is of poly vinyl chloride (PVC).
The Filter are fitted with a multi-port plastic valve operated by hand lever or auto multi-port valve.
Filter are designed to handle flow rate of up to 25m3/hr.
Features
- The filters are free- standing, aesthetically designed, light weight, easy to install and maintain.
- The pressure vessel is made of FRC, PVC pipes the entire unit is corrosion resistant.
- The carbon filter are fitted with a single multi-port plastic valve operate by a hand lever or auto multi- port valve for ease of operation and maintenance.
Application
Activated carbon filters are used as pretreatment of feed water to Deminerlising (DM) plants and Reverse osmosis (RO) units that require removal of free residual chlorine present in feed water.
For removal of trace of oil, organic matter, colour and odour, special grades of carbon can be supplied on request.
Technical specification
| Model | NGMF 20 | NGMF 30 | NGMF 45 | NGMF 65 | NGMF 110 | NGMF 160 | NGMF 200 | NGMF 250 |
| Inlet /outlet | 32/32 | 50/50 | 50/50 | 50/50 | 63/63 | 36/63 | 80/80 | 80/80 |
| Connections with unions (mm) inlet/outlet | 32/32 | 50/50 | 50/50 | 50/50 | 63/63 | 63/63 | 90/90 | 90/90 |
| Max flow(m3/hr) | 2 | 3 | 4.5 | 6.5 | 11 | 16 | 20 | 25 |
| Max working pressure (kg?cm3 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 |
| Dimensional vessel Dia(mm) | 305 | 400 | 550 | 610 | 770 | 927 | 1067 | 1219 |
| Vessel Height(mm) | 1236 | 1670 | 1735 | 2336 | 2336 | 2336 | 2336 | 2336 |
