For instance, extruded polymer nettings serve as feed spacers in reverse osmosis membranes and as pleat supports in air and liquid cartridges, or even as outer sleeves protecting delicate filter elements.
At GESSNER, we specialize in producing these netting components for the broadest array of filtration needs, drawing on decades of material expertise. As a result, our nets can be found in transportation filtration, industrial processes, HVAC systems, water purification, and more – wherever robust support or flow channels are needed to optimize filtration performance. Our goal is to ensure each of our customers finds the right netting solution for their specific application, leveraging our deep knowledge of functional polymer materials and filter design to solve unique challenges.
Requirements for Netting Components
Filtration nettings must meet rigorous requirements defined by their application. Mechanical strength and dimensional stability are among the most critical, as the netting must support filter media without deforming under pressure, airflow, or process conditions. At the same time, a high open area is essential to maintain flow and minimize pressure drop. This balance between structural support and flow capacity allows the filtration media to perform effectively while preserving overall system efficiency.
Depending on the application environment, netting components may also require resistance to chemicals, elevated temperatures, and long-term operational stress. Polypropylene and polyethylene are commonly used for general-purpose filtration due to their lightweight, corrosion-resistant properties. For more demanding conditions involving aggressive chemicals or sustained high temperatures, specialty polymers such as PPS and PVDF are often selected for their excellent thermal stability, chemical resistance, and long-term durability.
Every application – whether it’s a dust collector, a HEPA air filter, or a liquid process filter – brings its own set of demands, and thus the material and design of the netting must align with those demands, like FDA-approved resins for food and pharma filters or UL94 V-0 flame retardancy for high-temp environments.
Function of Netting Components – How it works
In practice, netting components enhance filter performance by providing consistent spacing, support, and flow distribution. GESSNER offers different nettings to be used in a wide range of functions and applications:
- Feed spacer netting in a spiral-wound membrane module ensures uniform feed flow and prevents membrane surfaces from touching, thereby maintaining filtration efficiency.
- Pleat support nettings in pleated filters keep the folds evenly separated, preventing “pleat collapse” which would reduce surface area and efficiency.
- Netting sleeves wrapped around filter elements act as a protective cage, shielding the filter media from mechanical damage and ensuring it maintains shape under pressure.
- Rigid tubes act as internal support structures in filter elements, maintaining dimensional stability under pressure while enabling efficient flow through their open geometry.
- Rigid cages are used in applications like bag filters to prevent media collapse, ensuring consistent filtration performance even under high flow or pulse-cleaning conditions.
- Permeate tubes in membrane-based systems collect and channel the filtered fluid, forming the central backbone that ensures structural integrity and controlled flow paths.
- Cores provide internal reinforcement and flow channels within filter elements, balancing mechanical strength with high open area to optimize efficiency.
- Sleeves are placed around filter elements to stabilize pleats and protect the media from mechanical stress during handling and operation.
- Screens act as separation or support layers within filtration systems, ensuring defined flow distribution while protecting and reinforcing sensitive filter media.
The open mesh design of these nettings is key: it maximizes the flow area so that air or liquid can pass through with minimal pressure drop. At the same time, strong polymer strands provide structural reinforcement, ensuring that the filter can withstand stress like high differential pressure or vibrations, without deforming.
In summary, netting components work by balancing porosity for flow, with strength for support – a combination that optimizes filtration performance and extends filter service life by reducing wear and tear on the media.
Netting components may be less visible than the filter medium itself, but they are indispensable to reliable filtration. With GESSNER’s material expertise and customization capabilities, clients can choose from a wide range of netting products to perfectly fit their filtration design and operating conditions.
By selecting the appropriate netting component – whether a feed spacer, screen, pleat support, core, rigid or permeate tube, machined parts or sleeves – manufacturers of filter elements and filtration material suppliers can ensure longer filter life, improved efficiency, and peace of mind that their products will perform in even the toughest environments.
Contact us today to discover how advanced netting components can elevate your filtration solution to new levels of durability and performance.
