We need recent complete analysis details of water to be treated, Total quantity of treated water required per day & per hour, End use of the treated water (Application), Desired treated water quality with specification
Multi Grade Sand Filter
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Multi Grade Sand Filter
The INDION 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 waters containing 50-25 ppm suspended solids respectively to produce a filtrate with less than 5 ppm
INDION New Generation Multigrade filters (NGMF) series remove suspended solids from feed water. They also remove turbidity provided the feed water has already been coagulated and clarified. Filters are designed to handle a maximum flow of 35 m³/h.

Salient Features
NGMF series of Multi Grade Filters 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 filters resulting in lower footprint
The entire unit is made up of plastic material. Pressure vessel 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 unit exceeds the set limit
Advantages
- Higher specific flow rate than conventional downflow filters thereby saving on space and cost
- Very little maintenance required
- In most cases, raw water can be used for backwash
- Lowe backwash water requirement
- FRP vessel and PVC pipes are corrosion resistant
- Lightweight and easy to operate
Applications
Pre treatment for drinking water
Pre treatment for Reverse Osmosis systems
Swimming pool filtration
Pre treatment for cooling towers and boiler feed
Sidestream filtration of cooling water
Pretreatment for mineral water bottling plants
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RO plant membranes, Ultra-Filtration(UF) plant membranes, DM plant & Softening plant resins and all genuine spares required, Preference to share to offer AMC or O&M mutual consent
To solve quality issues in treatment plant, To solve quantity (OBR) issues in treatment plant
Sharing recent report with the current performance data & expected expansion capacity to study and offer upgradation treatment system
We have in-house analysis fecilities to support for complete analysis of raw water boiler feed and blow down water & cooling tower bleed off water to suggest for any remedial measure, if needed
Experts training programs can be availed on prior appointment for the benefit of operations to enhance filter knowledge & operational procedure
