Pressure Sand Filter
Aquatic Solutions
Pressure Sand Filter
High-performance pressure sand filters for turbidity removal, suspended solids reduction, and pre-treatment of RO and other membrane systems — robust, low-maintenance, and cost-effective.
Overview
A Pressure Sand Filter (PSF) is one of the most widely used and cost-effective water treatment technologies for removing suspended solids, turbidity, iron, and manganese from water. It works by passing water under pressure through a bed of graded silica sand and gravel, which physically traps suspended particles. Sand filters are used as standalone treatment units and as pre-treatment for RO, UF, and other membrane systems.
Aquatic Solutions manufactures pressure sand filters in FRP (Fibre Reinforced Plastic) and MS (Mild Steel) epoxy-coated construction, in sizes from 6-inch diameter (500 LPH) to 2,400 mm diameter (5,00,000 LPH and above). Our filters use graded silica sand and gravel media, with a multiport valve for easy operation (service, backwash, rinse, and bypass modes). We also supply multi-media filters with anthracite and garnet layers for improved filtration efficiency.
Key Features
- Graded silica sand and gravel media for effective turbidity removal
- FRP and MS epoxy-coated vessel options
- Multiport valve for easy service, backwash, and rinse operation
- Capacities from 500 LPH to 5,00,000 LPH
- Multi-media filter option (sand + anthracite + garnet)
- Automatic backwash timer for hands-free operation
- Inlet distributor for uniform flow distribution
- Underdrain lateral system for efficient backwash
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Technical Specifications
| Parameter | Specification |
|---|---|
| Vessel Material | FRP / MS epoxy-coated / SS 304 |
| Filter Media | Graded silica sand (0.4–0.8 mm) + gravel support |
| Filtration Rate | 10–15 m/hr (standard) / 20–25 m/hr (high-rate) |
| Turbidity Removal | Inlet up to 50 NTU → Outlet < 5 NTU |
| Backwash Rate | 25–30 m/hr for 10–15 minutes |
| Operating Pressure | 2.5–6 bar |
| Capacity Range | 500 LPH – 5,00,000 LPH |
| Valve Type | Multiport valve (6-position) or butterfly valves |
How It Works
Downflow Filtration
Water enters the filter vessel from the top and flows downward through the graded sand and gravel media bed. Suspended particles are trapped in the void spaces between sand grains by physical straining, sedimentation, and adsorption.
Turbidity Removal
As water passes through the sand bed, suspended solids, turbidity, iron flocs, and organic particles are progressively removed. The outlet turbidity is typically below 5 NTU from an inlet of up to 50 NTU.
Pressure Drop Monitoring
As the filter bed accumulates solids, the pressure drop across the filter increases. When the pressure drop reaches the set point (typically 0.5–1 bar), or after a set time interval, the filter is taken offline for backwash.
Backwash
During backwash, water flow is reversed — clean water flows upward through the sand bed at high velocity (25–30 m/hr), expanding and fluidising the bed to dislodge and flush out accumulated solids to drain.
Rinse
After backwash, a forward rinse (downflow) is performed to settle the sand bed and flush any remaining turbidity to drain before the filter is returned to service.
Return to Service
The filter is returned to service in downflow mode, delivering clean, low-turbidity water for direct use or as pre-treatment for RO, UF, or other downstream systems.
Capacity Options & Indicative Pricing
Prices are indicative and vary based on raw water quality, automation level, and site conditions. Contact us for an exact quotation.
| Capacity | Typical Application | Indicative Price (INR) |
|---|---|---|
| 500 – 5,000 LPH | Small institution, RO pre-treatment | ₹30,000 – 2 Lakhs |
| 5,000 – 50,000 LPH | Industry, hotel, housing complex | ₹2 – 12 Lakhs |
| 50,000 – 5,00,000 LPH | Large industry, municipality | ₹12 – 60 Lakhs |
* Prices are ex-works, exclusive of GST, civil work, and installation. Final price depends on site-specific requirements.
Industries & Applications
Why Choose Aquatic Solutions?
Service Coverage Across India
Aquatic Solutions manufactures and supplies pressure sand filters across India — Mumbai, Pune, Hyderabad, Bangalore, Chennai, Delhi NCR, Ahmedabad, Surat, Nashik, and all major cities. We serve WTPs, RO plants, swimming pools, and industrial clients across Maharashtra, Gujarat, Karnataka, Tamil Nadu, and Telangana.
Frequently Asked Questions
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