How are Sanitary SS Filter Housings Used in Bottled Water Plants?

In large-scale bottled water production, water safety, taste consistency, and regulatory compliance are the cornerstones of a successful operation. From raw water intake to final filling, the filtration system runs through the entire process - directly determining water quality and production stability. Conventional cartridge filters housing are prone to residue buildup, difficult to clean, and offer poor corrosion resistance, making them unsuitable for food-grade applications. In contrast, Sanitary Stainless Steel Filter Housing deliver advantages such as dead-end free design, easy sterilization, high precision, and long service life. They are the ideal choice for pre-treatment and fine filtration in bottled water production - ensuring water quality standards, improving production efficiency, and reducing long-term operating costs.

1. Full-Process Filtration for Bottled Water

During the large-scale production of bottled water, the filtration stage is central to ensuring water safety and purity. The entire process strictly follows the principle of "coarse to fine, stepwise purification" employing closed-loop treatment throughout to progressively remove impurities and eliminate risks. This guarantees that every bottle leaving the production line meets national hygiene standards and quality requirements.

● Pressure boosting and mechanical filtration: From the tank, the water flows through a booster valve to increase pressure, then enters a mechanical filter. This filter removes suspended solids, sand, and other coarse impurities.

● Raw water intake and storage: The production process begins at a natural mineral water source. The raw water is first collected and stored in a raw water tank, which ensures a stable supply and preliminary settling of large particles.

● Hollow fiber ultrafiltration: The water then undergoes hollow fiber ultrafiltration, a membrane process that removes bacteria, viruses, and macromolecular colloids. This step is critical for achieving microbiological safety without using chemical disinfectants.

● Final filling and storage: The treated mineral water is delivered to a fully automatic filling machine, which fills and seals bottles under hygienic conditions. Finally, the finished bottled water is stored in a mineral water tank, ready for distribution and consumption.

● Air-water mixing and ozonation: Following ultrafiltration, an air-water mixer enhances contact between water and ozone. The ozone generator produces ozone gas, which is injected into the water for disinfection and oxidation, effectively killing any remaining microorganisms and improving taste.

● Adsorption and safety filtration: After mechanical filtration, the water passes through an adsorption filter (typically containing activated carbon) to eliminate chlorine, odors, and organic compounds. Next, a safety filter housing(also known as a cartridge filter housing) captures any fine particles that may have escaped previous steps, protecting downstream equipment.

2. The Importance of Pre-filtration for Bottled Water and the Selection of Security Filter Housing

For bottled water treatment plants, pre-filter selection directly impacts pre-treatment performance and line stability. Five key points to consider:

● Precision: 5μm–10μm rating for pretreatment - balances high flow with effective particle removal.

● Compliance: Supports CIP and high-temperature sterilization, meeting automated plant requirements.

● Flow: Single-cartridge for low flow, multi-cartridge for high-capacity lines to ensure continuous production.

● Material: 304/316L sanitary stainless steel - food-grade, corrosion-resistant, non-leaching, no secondary contamination.

● Design: Mirror-polished interior, no dead ends; equipped with vent and drain valves for complete drainage, easy cleaning, and sterilization.

Hongtek has the following several types of filter housing that can play an important role in bottled water treatment plants:

UPH Series - Single-Cartridge Sanitary Filter Housing

● Applications: Small-scale bottled water plants, laboratories, final polishing, prefiltration

● Features: Compact footprint, high precision, stable operation – ideal for low-flow applications

● Material: 304/316L sanitary stainless steel, interior polished to Ra ≤ 0.3μm, dead-end free, easy to clean

● Structure: Single-cartridge design, simple installation and maintenance, complete drainage with no residual liquid

MPH Series - Multi-Cartridge Sanitary Filter Housing

● Features: Low fouling rate, stable performance, supports continuous high-volume production

● Material: 304/316L sanitary stainless steel, finely polished inside and out, resistant to high temperatures and corrosion

● Structure: Multi-cartridge configuration with quick-open cover for fast cartridge changes, large filtration area, high flow capacity

● Applications: Medium to large bottled water plants, spring water production lines, high-flow prefiltration, fine filtration and sterilization

3. Conclusion

For bottled water treatment plants, prefiltration serves as the first line of defense in stable production, with sanitary stainless steel filters forming the core of that defense. When selecting a filter, focusing on four key aspects - compliant materials, dead-end-free design, proper flow rate matching, and ease of maintenance - helps protect production equipment, improve water quality consistency, and reduce overall costs. Our Hongtek sanitary stainless steel filters are a premium choice for bottled water plants seeking to enhance quality, boost efficiency, and lower costs. With high-standard filtration, we deliver superior water quality - ensuring that every bottle is safe, pure, and reliable.