Stainless steel filter tank

Product Specification

Stainless steel filter tank | Corrosion resistant and high strength · Compatible with multiple media/activated carbon/manganese sand

This stainless steel filter tank is welded from high-quality 304 or 316L stainless steel plates. The interior can be filled with various filter media such as quartz sand, activated carbon, manganese sand, anthracite, or multi-media to remove suspended solids, silt, iron, manganese, residual chlorine, color, odor, and some organic matter from water, depending on the water quality requirements. The equipment is designed for high pressure and strong corrosion resistance. It is equipped with a water distribution system, a water collection device, and a manhole for easy loading/unloading of filter media. It can be used with automatic or manual control valves to achieve efficient filtration and backwashing. It is widely used in industrial water treatment, drinking water purification, greywater reuse, swimming pool circulation, and seawater desalination pretreatment.

core components

Stainless steel tank body: Made of SUS304/SUS316L, with longitudinal and circumferential argon arc welding, pickled and passivated or mirror polished, capable of withstanding pressures of 6-10 bar.

Inlet/outlet water distribution device: Bell-mouth or pipe-type water distributor to ensure uniform water distribution and collection, preventing flow deviation.

Manhole: Quick-opening manhole on the top or side for easy filling and replacement of filter media.

Pipeline interfaces: Standard flange or clamp interfaces for connecting to the feed valve, discharge valve, backwash valve, and vent valve.

Optional accessories: Automatic multi-way valve (time/flow type), pressure gauge, sampling valve, sight glass, and differential pressure switch..

Working principle

Filtration Process: Raw water enters from the top of the tank, is evenly distributed by the water distribution device, and then flows downwards through the filter media layer. The filter media removes impurities from the water through interception, adsorption, and sedimentation. The clean water flows out through the bottom collection device.

Backwashing and Regeneration: When the filter media becomes saturated (due to increased pressure difference or timed intervals), the valve is switched to reverse the water flow upwards to flush the filter media, removing trapped impurities from the tank and restoring filtration capacity. After backwashing, the system re-enters the filtration state.

Main advantages

High corrosion resistance: Made of 304/316L stainless steel, suitable for corrosive waters such as acids, alkalis, seawater, and chloride ions, with a service life 3-5 times longer than carbon steel.

High strength and hygiene: High pressure resistance, can be configured with a mirror-finish inner wall, suitable for high hygiene requirements in food, pharmaceutical, and other industries.

Flexible application: Can be filled with functional materials such as quartz sand, activated carbon, manganese sand, anthracite, and resin, making it a multi-purpose tank.

Uniform water distribution: Professional water distribution and collection structure ensures high filter bed utilization and excellent filtration effect.

Easy maintenance: A well-designed top manhole allows for quick material replacement; flange interfaces facilitate on-site pipeline connections.

Automation capability: Can be equipped with automatic control valves (multi-way valves or pneumatic/electric butterfly valve assemblies) to achieve timed or differential pressure automatic backwashing.

Technical parameters

Tank Material: SUS304 / SUS316L

Diameter: Φ300 – Φ3000 (customizable)

Working Pressure: 0.2 – 1.0 MPa

Design Pressure: 1.0 – 1.6 MPa

Working Temperature: 5 – 60℃

Media Types: Quartz sand, activated carbon, manganese sand, KDF, resin, etc.

Connection Type: Flange DN40 – DN300, or clamp (sanitary grade)

Surface Treatment: Matte/brushed outer surface, pickled or mirror polished inner surface (sanitary grade optional)

Application areas

Pretreatment filtration for tap water plants and rural drinking water projects; side-stream filtration for industrial circulating cooling water and greywater reuse; quartz sand/activated carbon filters in pure/ultrapure water pretreatment systems; iron and manganese removal from groundwater (manganese sand filter media); swimming pool circulating water filtration; seawater desalination pretreatment (corrosion-resistant materials). We can provide tank diameter, height, and filter media configuration solutions based on treatment flow rate, water quality requirements, and installation space. Welcome to send your operating parameters for customized design.