316L Stainless Steel Bag Filter Housing: Reliable For High Hygiene

The 316L stainless steel bag filter features an ultra-low carbon molybdenum-enriched composition as its core characteristic. It withstands strongly acidic/alkaline media across pH 1-14 (including hydrochloric acid, sulfuric acid, sodium hydroxide, etc.), with an annual corrosion rate of <0.001 mm in 5% HCl solution. Its chloride stress corrosion cracking resistance is 3 times higher than 304 stainless steel, enabling direct use in high-chloride environments such as seawater and electroplating solutions . Yuwei Filter Equipment the material withstands temperatures up to 220°C, supporting >1,000 cycles of in-place sterilization (SIP) with 132°C saturated steam to meet sterile processing requirements. The Ra ≤0.8 μm electropolished surface reduces microbial adhesion risks by 60%.

Typical Applications

1. Highly corrosive media
   Metal particle recovery from acid wash waste (pH=1-2) and PCB etching solutions (containing copper ions).
2. High-salinity environments
   Seawater desalination pretreatment, cooling water filtration in coastal power plants (Cl⁻ >10,000 ppm).
3. High-temperature sterilization
   Final polishing filtration of water for injection (WFI) in biopharma, sterilization of cell culture media.

Key Advantages of 316L Stainless Steel Bag Filter Housing

Hygiene Compliance

Constructed with 316L stainless steel material and electropolished surface treatment (Ra≤0.8μm) to minimize microbial adhesion risks. Certified under FDA 21 CFR 177.1520 for food contact materials, complying with GMP sterile production and HACCP sanitation standards. Especially suitable for sensitive media filtration (e.g., injections, beverages).

Long-Term Corrosion Resistance

Passivated surface withstands strong acids/alkalis (pH 1-14), maintaining >5,000 hours of pitting resistance in 5% hydrochloric acid accelerated corrosion tests. Withstands 220°C saturated steam for online SIP sterilization, ideal for biopharmaceutical high-temperature disinfection processes. Design life ≥5 years.

Engineering Features

Safety Sealing System

Fully argon-arc welded manufacturing, passing 1.5x pressure tests per GB/T 150.1 standard. Fluorinated rubber (FKM) seals (heat-resistant to 180°C) ensure leak-free operation at 1.0 MPa working pressure.

Flexible Configuration

Supports single-unit, duplex-unit (continuous operation), and multi-bag parallel setups. Filter bags available in 1-200μm precision with PP (acid-resistant), PTFE (high-temperature), nylon (oil-resistant) materials, covering pre-filtration to final polishing needs.

Selection Guidelines

Prioritize 316L stainless steel bag filter housing when processes involve:

• Media conditions: Temperatures >80°C (exceeding PP limits) or strong acid/alkali environments (pH <2 / >12)
• Compliance requirements: Mandatory certifications (FDA, GMP, ISO 9001)
• Continuous production: High-cost unplanned downtime scenarios (Duplex Bag Filter Housing recommended for online maintenance)

Custom Technical Services

As an industrial filtration equipment manufacturer, Yuwei Filter provides end-to-end support:

•  Parameter analysis:

Calculate optimal filtration area based on flow rate, temperature, media composition, and precision requirements.

• System design:

Simulate pressure drop curves to predict bag replacement cycles (<10% deviation).

• Solution validation:

On-site prototype testing to ensure process-device compatibility.

Yuwei Filter Equipment supplies bag filter housing including single bag filter housing, multi bag filter housing, stainless steel bag filter housing, PP bag filter housing, and duplex bag filter housing, with 20+ material/precision combinations. We deliver professional filtration solutions for water treatment, chemical processing, pharmaceuticals, and related fields.