LFQ-1600 Shallow Sand Filter 100 Ton Per Hour Quick Backwash Multimedia Filter For Municipal And Industrial Feed Water

Product Overview

Water Filter Element pretreatment chain starts with bulk gravity filtration, and the LFQ-1600 shallow sand filter is the pressure-type multimedia unit under Water Filter Element. Working pressure 0.2-2.5 MPa, operating temperature ≤80 ℃, filtration speed 30-60 m/h, backwash water consumption 1-3%, backwash intensity 4-15 L/s·m², backwash duration 10-15 min, bed expansion 40-50%. LFQ-1600: φ1600×2200×8, DN100, single flow 100 t/h, 1.0 MPa; tank Q235B / 304 / 316L / rubber-lined carbon steel, water caps ABS / 304 / 316L.

Basic Technical Parameters

Model	LFQ-1600
Tank size	φ1600 × 2200 × 8 mm
Inlet / outlet	DN100
Max single flow	100 t/h
Pressure	1.0 MPa
Filtration speed	30-60 m/h
Backwash water consumption	1-3%
Backwash intensity / duration	4-15 L/s·m² / 10-15 min
Bed expansion	40-50%
Control mode	Manual / automatic time control

Municipal And Industrial Feed Water Scenario

Surface-water intakes carry seasonal silt and organic turbidity that cartridge filters cannot hold economically, and the multimedia sand filter removes bulk suspended load before cartridge or RO stages. LFQ-1600 at 100 t/h sits on a municipal make-up line or industrial raw-water station, with layered anthracite and sand media trapping silt through depth. Automatic time control sequences filter and backwash without an operator; the 1-3% backwash rate limits water waste. After sand filtration, downstream fine protection uses a High Flow Filter Cartridge or cartridge bank before membrane stages.

Product Advantages

Pressure-type shallow-bed design keeps footprint small compared with open gravity filters, and 30-60 m/h speed suits compact stations. Layered media and ABS/304/316L water caps distribute backwash evenly to 40-50% bed expansion, preventing media channeling. Tank options Q235B, 304, 316L or rubber-lined carbon steel cover potable, process and corrosive raw water. Automatic time control reduces attendance, and single-flow range 0.5-180 m³/h scales from LFQ-400 to LFQ-1800.

Manufacturer And Factory Strength

Our pressure-filter workshop builds LFQ units across 400 to 1800 tank diameters, with manifold and valve trains assembled and leak-tested before dispatch. Media grading and water-cap configuration are quoted against raw-water analysis. For station layout and backwash calculation, contact our engineering team; see the matching downstream consumable line at replacement imported filter element.

FAQ

Q1: What is the difference between shallow sand filter and gravity rapid sand filter?
A1: Shallow pressure beds run under pump pressure at higher speed in a compact vessel; gravity beds are open tanks with lower speed and larger footprint.

Q2: How much water does backwashing consume?
A1: 1-3% of treated flow, with 10-15 minute duration and 40-50% bed expansion, controlled automatically.

Q3: Can it remove hardness or dissolved salt?
A1: No. It removes suspended silt and turbidity; dissolved minerals need softeners or RO downstream.

Q4: Which tank material for potable water?
A1: 304 / 316L or rubber-lined carbon steel; plain Q235B is for non-potable industrial raw water.

Q5: What flow does the LFQ family cover?
A1: Single flow 0.5-180 m³/h across LFQ-400 to LFQ-1800, matching small booster stations to municipal works.

Reference: GB/T 13927 pressure filter test method for water treatment