The LFQ Series Shallow Sand Filter is a high-efficiency automatic filtration system developed by Xinxiang Lierte Filtration Equipment Co., Ltd., tailored for raw water purification in domestic and light industrial scenarios.
It adopts a modular parallel design (10-filter tank configuration as standard) with high-purity quartz sand as the filtration medium, and is equipped with a household PLC control cabinet with a text screen for intelligent operation.
The system operates in two states: continuous filtration and one-by-one backwashing (driven by three-way solenoid valves), ensuring uninterrupted water supply during maintenance. Constructed with Q235 carbon steel shells (6–10mm thickness) and standard inlet/outlet sizes (DN50/80/100), it covers a flow rate range of 15–230 m³/h and a working pressure of 10 bar, adapting to water demand from single-family homes to large residential communities.
LFQ Series Shallow Sand Filter Technical Parameters
This table details the key technical parameters of the LFQ series shallow sand filter, covering shell dimensions, structural performance, flow capacity and control configuration. All models adopt Q235 carbon steel shell and quartz sand filter medium, equipped with household PLC control cabinet with text screen for intelligent operation, which can be flexibly selected according to actual water treatment demand.
| Model | Shell Specification | Inlet/Outlet Size | Flow Rate (m³/h) | Working Pressure (bar) | Shell Material | Filter Medium |
|---|
| LFQ-600 | φ600×1550 | DN50 | 15 | 10 | Q235 | Quartz Sand |
| LFQ-800 | φ800×1650 | DN50 | 30 | 10 | Q235 | Quartz Sand |
| LFQ-1000 | φ1000×1750 | DN80 | 45 | 10 | Q235 | Quartz Sand |
| LFQ-1200 | φ1200×1950 | DN80 | 60 | 10 | Q235 | Quartz Sand |
| LFQ-1400 | φ1400×2150 | DN80 | 70 | 10 | Q235 | Quartz Sand |
| LFQ-1600 | φ1600×2200 | DN100 | 100 | 10 | Q235 | Quartz Sand |
| LFQ-1800 | φ1800×2250 | DN100 | 120 | 10 | Q235 | Quartz Sand |
| LFQ-2000 | φ2000×2300 | DN100 | 150 | 10 | Q235 | Quartz Sand |
| LFQ-2200 | φ2200×2300 | DN100 | 200 | 10 | Q235 | Quartz Sand |
| LFQ-2400 | φ2400×2300 | DN100 | 230 | 10 | Q235 | Quartz Sand |
Technical Features
Intelligent PLC Control: The text screen-equipped control cabinet enables automatic pressure monitoring, timed/on-demand backwashing, and one-key operation, minimizing manual intervention.
One-by-One Backwashing: Single filter tanks are backwashed independently without system shutdown, ensuring 24/7 filtration.
Robust Structural Design: Q235 carbon steel shells with anti-corrosion treatment and precision-machined three-way solenoid valves guarantee long-term stability.
Modular Expansion: Parallel tank design allows flexible addition of filter units to match increased flow demands.
Standardized Piping: DN50/80/100 inlet/outlet sizes are compatible with global mainstream pipeline systems for easy installation.
Advantages
Uninterrupted Water Supply: Backwashing without system downtime meets the continuous water demand of residential and industrial users.
Low Operational Costs: Automatic control reduces labor costs; quartz sand media is cost-effective and easy to replace, with backwashing consuming only 5–10% of filtered water.
Durable & Reliable: The thickened Q235 steel shell and high-quality valves ensure a service life of over 10 years under normal use.
User-Friendly Operation: The text screen interface simplifies parameter setting and fault diagnosis, suitable for operators with minimal technical training.
Wide Model Range: 10 models cover flow rates from 15 to 230 m³/h, fitting scenarios from single-family homes to large residential communities.
Application Fields
Domestic Water Supply: Purification of tap water for villas, apartments, and residential communities to remove sediment and suspended solids.
Commercial Facilities: Water treatment for hotels, restaurants, and shopping malls to improve water quality for daily use and HVAC systems.
Light Industry: Filtration of cooling water and process water in food, electronics, and small chemical plants to protect production equipment.
Landscaping & Irrigation: Purification of water for garden sprinklers, golf course irrigation, and artificial lake circulation to prevent nozzle clogging.
Recreational Water: Filtration of swimming pool and water park water to maintain clear, hygienic water quality.
FAQ
How often should the quartz sand media be replaced?Quartz sand can be used for 2–3 years under normal conditions; replacement is needed when filtration efficiency drops by over 30% or the media is severely worn.
What is the backwashing cycle and duration for a single tank?The backwashing cycle is adjustable (8–24 hours by default), and a single backwash takes 5–10 minutes.
What raw water turbidity is the filter suitable for?It works with raw water of ≤100 NTU; pre-filtration is recommended for water with higher turbidity.
Can the filter be customized with stainless steel shells?Yes, we offer 304/316 stainless steel shell customization for corrosive water environments.
Do you provide on-site installation and commissioning services?We offer free remote commissioning guidance; on-site installation and training are available for an additional fee in major global regions.
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