Water Filtration | Ultra-Fine Screening for Polishing and Membrane Protection

Client: CFT in collaboration with Dow Chemical
Application: Polishing filtration and membrane protection in water treatment systems
Industry: Water & Environment

In advanced water treatment systems, filtration accuracy plays a critical role in protecting downstream assets. Polishing stages and membrane systems rely on consistent removal of fine particles to prevent fouling, pressure loss and premature failure. When filtration performance drifts, the effects can quickly spread across the entire treatment line.

ActionLaser’s collaboration with CFT and Dow Chemical focused on addressing this exact challenge. The goal was to develop a filtration screen capable of delivering ultra-fine separation while maintaining long-term stability in demanding water treatment environments.

Polishing filtration and membrane protection demand extremely tight control over aperture geometry. Screens must remove fine particles without introducing excessive pressure drop or clogging, and they must maintain that performance over time.

Traditional chrome-nickel and mechanically formed screens struggled in this role. Under continuous operation, apertures distorted, clogging increased and filtration behaviour became inconsistent. This variability placed membranes at risk and increased the need for cleaning, replacement and system intervention.

CFT and Dow Chemical required a filtration solution that could operate reliably at very fine micron levels while holding its geometry through long service life.

ActionLaser partnered with CFT and Dow Chemical in a four-year development program to engineer laser-drilled stainless steel screens specifically for water polishing and membrane protection applications. The focus was on achieving ultra-fine separation while maintaining long-term stability in continuous water treatment environments.

Precision laser drilling made it possible to produce apertures at approximately thirty microns with tight control over size, spacing and geometry. Stainless steel construction provided the corrosion resistance and structural integrity required for sustained operation, while mechanically unstressed apertures helped prevent distortion, blinding and gradual performance loss. Multiple design iterations were tested to confirm the screens could deliver consistent separation without introducing excessive pressure loss or degradation over time.

The resulting filtration screens delivered stable, reliable polishing performance in water treatment systems where previous screen technologies had failed. Fine particle removal became more consistent, reducing the solids load reaching downstream membranes.

In operation, the screens maintained their aperture accuracy and flow behaviour, even under sustained use. This performance supported improved membrane protection, fewer interruptions and more predictable system performance across long operating cycles.

The technology has since been deployed in water treatment applications where ultra-fine, dependable filtration is critical.

The success of the filtration system came down to geometry control and material integrity. Laser drilling eliminated mechanical distortion, producing clean, uniform apertures that stayed within specification over time.

Stainless steel construction resisted corrosion and fatigue, allowing the screens to function as long-term components rather than consumables. Precise geometry ensured flow remained stable, while ultra-fine apertures delivered the level of separation required for polishing and membrane protection without compromising reliability.

For water treatment operators, membrane life and system reliability are central to long-term performance. Stable polishing filtration reduced stress on membranes, extended service intervals and improved overall system predictability.

By removing variability at a critical filtration stage, plants gained greater confidence in long-term operation and maintenance planning. The screens became part of the system’s infrastructure, supporting consistent performance rather than requiring constant attention.

If your water treatment system relies on reliable polishing filtration or membrane protection, contact ActionLaser to discuss a precision stainless steel solution engineered for long-term performance.