Water treatment
Sand and multimedia filtration systems
Pressure sand and multimedia filters that remove suspended solids, silt and turbidity from raw water, used as RO and softener pre-treatment and to protect cooling-tower loops, heat exchangers and process lines.
Overview
A pressure sand filter is a closed vessel holding graded silica sand on a gravel support bed. Water flows downward through the media, which traps suspended matter, and the bed is periodically backwashed to lift and flush the collected solids. Multimedia versions layer media of different sizes and densities, and a carbon layer can be added for dual-media duty. Vessels are carbon steel with an epoxy lining, FRP, or with stainless-steel or food-grade PVC internals.
Units can be vertical or horizontal, single or arranged as duplex or parallel skids, with automatic backwash triggered by differential pressure or run time.
Selecting the right sand filter
Consider feed turbidity and suspended solids, required outlet quality, flow rate and operating pressure. These set the vessel diameter, media depth and grading. Shell material depends on water chemistry and whether the application is food or pharmaceutical. Also decide between manual, semi-automatic and automatic backwash, and confirm backwash water availability and disposal.
Range overview
- Types and variants
- Low-Pressure Sand Filter
- High-Pressure Sand Filter
- Multimedia Filter
- Carbon-Sand Dual-Media Filter
- Duplex or Parallel Skid
- Vertical
- Horizontal
- RO Pre-Filter
- Semi-Automatic
- Automatic
- Materials and grades
- IS 2062 Carbon Steel, Epoxy-Lined
- FRP
- Epoxy-Lined Mild Steel
- SS 304 or SS 316 Internals
- Food-Grade PVC Internals
- Silica Sand
- Garnet
- Support Gravel
- Coconut-Shell Activated Carbon
- Size range
- Single Units 5–150 m³/h
- Skids up to 600 m³/h
- 2000, 4000 and 8000 LPH Models
- Silica Sand 0.4–0.8 mm
- Gravel 2–4 mm
- Pressure / temperature
- Operating Pressure 2–8 bar Standard, up to 12 bar Custom
- Hydro-Test at 1.5 × Design Pressure
- Backwash at 0.7 kg/cm² Pressure Drop
- Connections and interfaces
- Flanged
- Grooved Coupling
- Standards referenced
- IS 2062
- Features
- Automatic Backwash
- Differential-Pressure Gauges
- Tool-Free Manways
- Under-Drain Distribution Plates
Exact specifications depend on the variant, material and size. Confirm ratings and certification against the datasheet or with our engineers before ordering.
Applications
- RO Pre-Treatment
- Softener and EDI Pre-Treatment
- Cooling Tower and Heat Exchanger Protection
- Borewell and Surface Water Filtration
- Bottle Rinsing and CIP Water
- Irrigation Water
Industries
- Manufacturing
- Food and beverage
- Chemical
- Pharmaceutical
- Textiles
- Agriculture
- Power generation
- Municipal
Information that speeds up a quotation
Share what you know. Anything you are unsure of can be marked “not known” — our engineers will help confirm it.
- Feed source
- Flow
- Inlet analysis
- Outlet target
- Recovery
- Site
- Power
- Disposal
- OPEX
Need a datasheet?
Add this family to your enquiry list and mention the variant — we will send the relevant technical documents.
Water treatment
Related and alternative families
Industrial reverse-osmosis water plants
Skid-mounted reverse-osmosis plants that reduce dissolved salts in raw or pre-treated water to produce process water for boiler feed, pharmaceutical formulation, food…
Commercial reverse-osmosis plants
Compact reverse-osmosis plants for offices, schools, hospitals, hotels, restaurants, apartment blocks and packaged drinking water units, sized for commercial demand where a…
Industrial water softening systems
Ion-exchange softening plants and salt-free conditioners that remove or control calcium and magnesium hardness in process water, protecting boilers, cooling towers, process…
Commercial water softening systems
Water softeners and conditioners for hotels, hospitals, apartment blocks, institutions, salons and malls, used to limit limescale in pipework, water heaters, laundry…
Water filtration plants
Engineered water filtration and treatment plants that take raw water from borewells, rivers, lakes or recycled sources through clarification, filtration and disinfection…
Activated carbon filtration systems
Activated carbon filters that adsorb chlorine, odour, colour and organic compounds from water, commonly installed ahead of RO membranes and in process…
Related solutions and guides
Frequently asked questions
How do I choose between a sand filter and a multimedia filter?
A single-media sand filter suits moderate turbidity and general pre-filtration. A multimedia filter uses layers of different media so that coarser particles are held near the top and finer ones deeper in the bed, which can extend run time between backwashes on dirtier water. The choice depends on feed solids, required outlet quality and backwash water availability.
What information is needed to size a pressure sand filter?
Send the design flow, operating pressure, a feed water analysis with turbidity and suspended solids, the downstream equipment being protected, and the preferred shell material. Mention whether you need manual or automatic backwash, any space limits, and the connection type expected at site so that nozzles can be specified correctly.
Ready to specify sand and multimedia filtration systems?
Send the details you have — quantities, sizes, drawings or a part number. Unknowns are fine.