This range of filters utilizes a single type sieved and graded sand based media with graded silex and pebbles as support media. Options are available for the external vessel in fabricated mild steel or FRP. All filters come with custom designed internals to ensure even distribution of incoming water, uniform collection of the filtered water and proper dirt removal during backwashing.

Features :

1. Conventional filtration
2. Low rate of filtration
3. Good filtrate quality
4. High frequency of backwash
5. Low capital cost
6. Easy availability

Feed water containing free chlorine must be reduced prior to use – to protect downstream units from oxidation. Activated Carbon Filter helps in achieving reduction of free chlorine (upto 1 ppm*) from feed water. Free Chlorine will not be detected in Dechlorinated water.

Unit is to be backwashed with influent water on a predetermined time or on attaining a differential pressure of 1 kg/cm2.

Raw water contains suspended solids which have to be removed prior to consumption. Multigrade Sand Filter contains carefully selected two different grades of sand to provide surface and depth filtration. Multigrade Sand Filter reduces suspended solids (10 to 25 ppm*) from raw water. The filtered water will have a suspended solid of < 5 ppm which is acceptable for most of the applications. Unit is to be backwashed with influent water at a predetermined time or on attaining a differential pressure of 1 kg/cm2.

Features :

1. High rate of filtration
2. High filtrate quality
3. Lower frequency of backwash
4. Low pressure drop
5. High dirt holding capacity
6. Lower capital cost

This range of filters utilizes a combination Anthracite, sieved and graded sand based media with graded garnets as support media. Options are available for the external vessel fabricated either in mild steel or FRP. All filters come with specially designed internals to achieve higher filtration velocities and ensure even distribution of incoming water, uniform collection of the filtered water and proper dirt removal during backwashing.

Features :

1. High rate of filtration.
2. High filtrate quality.
3. Longer service cycles.
4. Higher backwashing efficiency.
5. Low pressure drop.
6. High dirt holding capacity.
7. Higher capital cost.

The treated water from a cation (degasser - optional) - anion unit will have a conductivity of < 30 ms/cm at 25 deg C and a dissolved silica of < 0.5 ppm. Mixed Bed unit contains both cation and anion exchange resin in mixed form, thus acting as multiple individual cation anion unit in a single vessel. The trace sodium, silica from influent water are exchanged to produce the desired treated water quality. Mixed Bed unit helps in achieving a conductivity of < 1 ms/cm at 25 deg C and a dissolved slica of < 0.05 ppm.

The influent water contain typically 1 ppm of sodium (cation), traces of chlorides, alkalinity and majorly dissolved silica (anion). The mixed bed unit contains both cation in H+ form and anion resin (OH-) in mixed condition. When the influent water containing sodium (Cations in water) comes in contact with the resins in Hydrogen form, Hyrdrogen ions are released in water in exchange of sodium. Only trace amount of sodium does escape through. The influent water containing small amount of chloride, alkalinity, silica (anions in water) comes in contact with the anion resins in Hydroxyl (OH) form, the OH ions gets released in water in exchange of chloride, Alkalinity and silica. A small quantity of silica slips through the anion exchange unit. Ion Exchange reaction is a reversible one. At a predetermined time or output, (when all the H+ in cation resin and OH- in anion resin is exhausted) the unit is regenerated with HCl and NaOH respectively.