LEFILTER Shallow Sand Filter: Fast, Efficient Filtration for Large-Volume Water

In municipal water treatment, industrial circulation, and agricultural irrigation, large-volume water needs quick, low-maintenance filtration to remove sediment, algae, and suspended solids. As a listed filtration solution provider (Stock Code: 837936), LEFILTER’s Shallow Sand Filter delivers rapid filtration, automatic backwashing, and space-saving design—ideal for high-flow, low-contaminant scenarios.

I. Core Specs & Dimensions

Modular design for single/multi-tank systems; custom sizes available:

Item	Specification	Description
Filtration Precision	10μm~100μm (adjustable via sand grade)	Traps suspended solids, silt, and fine sediment
Tank Diameter	800mm, 1000mm, 1200mm (±5mm)	Single-tank flow: 15~50 m³/h; multi-tank scalable to 500+ m³/h
Sand Layer Depth	200mm~300mm (standard)	Shallow design for fast backwashing (≤5 mins)
Working Pressure	≤0.6MPa	Stable for municipal/industrial water pressure
Operating Temp Range	5℃~60℃	Safe for 常温 /moderately heated water
Tank Material	304 Stainless Steel / FRP (optional)	304 SS: corrosion-resistant; FRP: lightweight, low-cost
Control Mode	Automatic (PLC) / Manual	PLC: timed/ differential-pressure backwash; no manual monitoring

II. Working Principle

2 key stages: filtration + automatic backwashing

1. Filtration Stage

Raw water enters the tank from the top, flows downward through the graded quartz sand layer (coarse sand → fine sand). Suspended solids are trapped in the sand gaps via adsorption and mechanical interception. Filtered water collects at the bottom and exits through the outlet.

2. Backwashing Stage

When pressure difference reaches 0.05MPa (or timed), the system auto-starts backwashing: clean water flows upward to fluidize the sand layer, flushing trapped impurities out via the drain. The process ends in 3~5 mins, and filtration resumes automatically.

III. LEFILTER Advantages

1. High Efficiency: Shallow sand layer enables fast flow (15~50 m³/h per tank) with low pressure loss.

2. Low Maintenance: Automatic backwashing reduces labor; sand lifespan up to 3 years (no frequent replacement).

3. Durable & Safe: 304 SS/FRP tanks resist corrosion; food-grade quartz sand meets water safety standards.

4. Scalable Design: Multi-tank systems adapt to 500+ m³/h flow; custom sizes fit site space.

5. Reliable Support: ISO 9001-certified production; 24/7 technical help; fast delivery (10~15 days for standard models).

IV. Key Applications

• Municipal water pretreatment (before disinfection)

• Industrial cooling water circulation

• Agricultural irrigation (greenhouse, large fields)

• Commercial swimming pool/water park filtration