Fiberglass / Stainless Steel Filter for Water Park Wave Pool Treating Equipments.
Sand Filter Water Treatment Equipment (also known as Quartz Sand Filter or Sand Filter) working principles:
Core Principle: Physical Filtration + Deep Retention
The sand filter water treatment equipment is a pressure filter that uses quartz sand as the filtration medium to remove suspended solids, colloids, and impurities from water through physical interception, adsorption, and sedimentation .
Operating Process (Three-Stage Cycle)
Stage One: Filtration Process (Forward Flow)
Water Distribution: Water to be treated enters from the top of the filter under pressure and is evenly distributed across the entire sand surface through the water distributor
Layer-by-Layer Retention: Water flows downward through the quartz sand filter bed, with impurities removed through the following mechanisms:
Mechanical Screening: The upper layer of coarse sand (0.8-1.2mm) intercepts large suspended particles (sand, algae, etc.)
Deep Interception: The middle layer of medium sand (0.5-0.8mm) removes smaller particles through inertial collision and interception
Adsorption and Sedimentation: The lower layer of fine sand (0.3-0.5mm) uses van der Waals forces to adsorb colloids and tiny particles
Clean Water Production: The filtered clean water is collected through the bottom collection system and discharged, with effluent turbidity reduced to <3 NTU
Stage Two: Backwashing Process
When the accumulated impurities in the filter layer increase, and the pressure differential between inlet and outlet reaches 0.05-0.08MPa or the operating cycle ends, the system automatically initiates backwashing:
Reverse Flow: Clean water enters from the bottom and flows upward in reverse through the filter bed
Filter Bed Expansion: The reverse water flow expands the sand layer by 40-50%, causing sand particles to rub against each other
Impurity Stripping: The attached impurities are stripped away and discharged from the top outlet with the rising water flow.
Stage Three: Forward Rinse Recovery
After backwashing, a brief forward rinse is performed to compact the filter bed, and after 2-5 minutes, it is put back into filtration operation
Key Design Parameters
| Parameter |
Typical Value |
| Filtration Rate |
8-15 m/h (15-20 m/h commonly used for swimming pools) |
| Filter Layer Thickness |
Single layer ≥700mm, multi-layer 1.2-1.5m |
| Quartz Sand Particle Size |
0.3-1.2mm (graded in layers) |
| Working Pressure |
≤0.6MPa |
| Backwash Intensity |
4-15 L/(s·m²) |
| Operating Cycle |
2-7 days (depending on water quality) |
Structural Components
Filter Tank: Usually made of fiberglass, carbon steel with anti-corrosion coating, or stainless steel
Multiport Valve (Sand Filter Head): Controls switching between filtration, backwashing, and drainage functions
Filter Media Layer: Mainly quartz sand, but can also be combined with multi-layer media such as anthracite and activated carbon
Water Distribution/Collection System: Ensures even water distribution and collection
Main Application Fields
Swimming Pool Recirculating Water Filtration (most common): Removal of suspended solids, sebum, and microorganisms from pool water
Industrial Water Treatment: Boiler feedwater and cooling circulating water pretreatment
Drinking Water Purification: Municipal water plants and rural water improvement projects
Membrane System Pretreatment: Protection of Reverse Osmosis (RO) and Ultrafiltration (UF) membranes from pollution
Agricultural Irrigation: Filtration of river and lake water to prevent drip irrigation emitter clogging
Technical Advantages
✅ Economical and Durable: Low cost of quartz sand with long service life
✅ Simple Operation: No complex chemical agents required, purely physical process
✅ Large Processing Capacity: Suitable for high-flow water treatment scenarios
✅ Easy Maintenance: Only requires periodic backwashing and media replacement (usually every 1-3 years)
Sand filtration is the most fundamental and widely applied pretreatment technology in the water treatment field, achieving continuous and stable operation through the periodic cycle of "filtration-backwashing"
Description:
Filter is one kind of water treating equipments.
It is made from stainless steel or fiberglass. Diameter from 1.0 to 1.8m.
This filter is one of our patents.
Why choose Vison Waterparks?
1. Turnkey service, fast delivery and one-stop after-sales.
2. Since 1994, over 30 years of rich experience in Water Park designing and manufacturing.
3. Export countries: Russia, Dubai, Tunisia, Australia, Indonesia, Egypt, Chile, Philippines, Bangladesh, Kyrgyzstan, Papua New Guinea and South Africa over 30 countries.
4. License: Manufacture License of Special Equipment Installation, alteration, repair&maintenance license of special Equipment.
5. Factory audited by CE, SGS & Intertek.
6. Factory area: 30,000m2.
Contact us:
BUILD A PROFITABLE WATER PARK!
Please feel free to contact us for a water park feasibility study report with layout design for free:
WhatsApp & WeChat: +86 13922323263
Email: visonwaterparks@gmail.com
Website:www.visonwaterparks.com
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