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Sand Filters

Single-media pressure sand filtration for turbidity, iron, and suspended solids removal.

Overview

Basiia supplies pressure sand filters using a single graded silica sand media bed for removal of suspended solids, turbidity, and iron from water and process streams. Sand filters are the most widely used pre-treatment technology ahead of RO, UF, and ion exchange systems — providing reliable, low-maintenance filtration with automated backwash. Our sand filter packages are supplied as vertical or horizontal pressure vessels in carbon steel, FRP, or stainless steel, with automated backwash controllers, differential pressure monitoring, and PLC control.

Typical Applications

  • Pre-treatment ahead of RO, UF, and ion exchange systems
  • Iron and manganese removal from groundwater
  • Turbidity removal from surface water
  • Cooling tower make-up water treatment
  • Swimming pool and recreational water filtration
  • Industrial process water clarification
  • Potable water production from groundwater
  • Tertiary wastewater polishing

Key Features

Engineered for Performance

Graded Silica Sand Media

Graded silica sand media (0.4–1.2 mm effective size, uniformity coefficient <1.5) in bed depths of 600–900 mm — providing effective removal of suspended solids and turbidity to <1 NTU from feeds up to 20–30 NTU.

Pressure Vessel Design

Vertical and horizontal pressure vessels in carbon steel (epoxy-lined), FRP, and 316L stainless steel — designed to ASME VIII or PED with internal distribution headers, media support underdrain, and manway access.

Automated Backwash

Automated backwash initiated by differential pressure (typically 0.5–0.7 bar) or timed cycle — with air scouring option for effective media cleaning and restoration of filter bed permeability.

Iron & Manganese Removal

Oxidation pre-treatment (aeration, chlorination, or potassium permanganate dosing) followed by sand filtration for removal of dissolved iron (up to 10 mg/L) and manganese from groundwater.

Multiple Vessel Configurations

Single vessel, duplex (duty/standby), and multi-vessel parallel configurations — sized to flow rate, required filtration velocity (5–15 m/hr), and backwash water availability.

Chemical Dosing Integration

Optional inline coagulant dosing (alum, ferric sulphate, or polyelectrolyte) and static mixing upstream of the filter — enhancing removal of fine colloids and colour from surface water sources.

Applicable Standards

  • ISO 9001
  • ASME VIII Div. 1 (pressure vessels)
  • AWWA B100 (Granular Filter Material)
  • WHO Guidelines for Drinking-Water Quality
  • Local environmental regulations

Get in Touch

Discuss Your Sand Filters Requirements

Our engineering team is available to review your project requirements and provide a technical proposal. Contact us to start the conversation.