PureULTRA II Membrane Modules

Ultrafiltration (UF) is a water treatment technology that is based on the use of a semi-permeable physical barrier. The membranes retain suspended particles, turbidity, sediment, bacteria, and viruses. As a result, contaminants do not enter the subsequent stages of the treatment system.

PureULTRA II modules use an outside-in configuration, which means “outside-to-inside” filtration: water is supplied under pressure from outside the hollow fibers, and purification occurs as it passes through the membrane into the fiber. Contaminants are retained on the external surface of the fiber, which simplifies cleaning and reduces the risk of clogging, while treated water proceeds further into the system.

This solution is equally effective for surface waters, groundwater sources, as well as wastewater after secondary or tertiary treatment. This approach ensures stable filtration quality regardless of the feed water type.

Application areas:

• Pretreatment for reverse osmosis
• Surface water treatment
• Water reuse
• Tertiary wastewater treatment
• Seawater treatment

PureULTRA II series modules combine filtration efficiency, operational convenience, and mechanical reliability. During development, MANN+HUMMEL engineers focused on fiber strength, chemical resistance, and system energy efficiency. Below are the key advantages that define the competitive characteristics of these membranes:

1. Filtration down to 0.025 μm
   The membranes retain most bacteria, viruses, turbidity, and suspended impurities. High filtration precision ensures quality treatment even when processing technically challenging feed water.
2. Enhanced fiber strength
   PVDF fibers have 30% higher tensile and tear resistance than traditional analogs. This reduces the risk of damage under challenging operating conditions and during backwashing.
3. Inside-out design
   The fiber arrangement allows contaminants to settle on the inner surface, which simplifies cleaning and reduces the risk of clogging. This principle increases flow stability and reduces service frequency.
4. Low pressure operation
   Modules operate in the range of ~0.02 MPa, which allows for reduced energy costs for water pumping and decreased equipment load.
5. Optimal performance
   Membranes provide consistent throughput levels even with prolonged use, allowing for highly accurate process planning.
6. Chemical reagent resistance
   PVDF material is inert to aggressive oxidizers and acids, allowing the use of membranes with most chemical cleaning solutions without resource loss.
7. Minimal deposit formation
   The drain cycle ensures effective removal of solid particles, reducing the likelihood of clogging and extending the service interval.
8. Stable operation under various conditions
   Thanks to contamination resistance and wide pH range, PureULTRA II modules are suitable for complex water treatment tasks: from secondary contaminated effluents to drinking water. NSF certification confirms their safety for use in water supply systems.

The engineering implementation of PureULTRA II membranes is thought out down to the smallest detail. The module design is adapted to industrial environments, includes a range of flexible solutions for installation and maintenance, and allows precise parameter selection for specific operating conditions. Below are the main design characteristics that affect integration convenience and system operation stability.

1. Flexible mounting
   Modules can be mounted both vertically and horizontally. This allows for easy system adaptation to site-specific features or existing equipment.
2. Variable filtration area
   Models are available with filtration areas of 60, 80, or 100 m², allowing precise performance selection to match enterprise requirements.
3. Fiber parameters
   External diameter — 1.3 mm, internal — 0.7 mm. This ratio allows achieving an effective balance between filtration capacity and flow resistance.
4. Optimized internal structure
   Uniform fiber placement in the housing reduces stagnation zones and ensures stable hydraulics throughout the entire operating cycle.
5. Compatibility with other systems
   Standardized connections simplify membrane integration into existing solutions without the need for complex reconstruction.
6. Industrial housing durability
   The materials used for housing manufacturing are corrosion-resistant and withstand standard industrial loads in humid and chemical environments.
7. Hygiene requirements
   The design complies with sanitary standards applicable in food, pharmaceutical, and drinking water industries.
8. Service convenience
   Quick access to main components allows technical work without complete disassembly or the use of special tools.

The PureULTRA II lineup is represented by three module variants: PHF-60-V, PHF-80-V, and PHF-107-V. Each has a different filtration area, allowing system adaptation to the required performance without changing the operating principle or housing dimensions.
Technical specifications of the models:

1. PHF-60-V — basic model with a membrane area of 60 m². Suitable for compact installations or local systems where space and energy savings are important.
2. PHF-80-V — universal option with an area of 80 m². Provides greater performance reserve and can be used in centralized or modular treatment systems.
3. PHF-107-V — model with the largest filtration area — 107 m². Designed for large enterprises with high water treatment volumes.

All modules are equipped with identical connection elements and support a unified backwash standard. Modules with different filtration areas can be combined within one system without changing the service scheme.

If you need help with model selection or technical consultation — contact the specialists at “Osnova” factory. Our experts will help adapt the solution to specific operating conditions, feed water characteristics, and production requirements.