PERFORATED SCREENS
Perforated screens are fine screens used in wastewater treatment plants for high-efficiency solids removal. Their perforated surface provides high filtration precision and long service life; the automatic cleaning mechanism keeps clogging risk low and maintenance needs minimal.
PERFORATED SCREENS
Perforated screens are high-efficiency solids removal equipment used as fine screens in wastewater treatment plants. When textile fibers, plastic pieces, food residues or small particles in wastewater cannot be retained by conventional bar screens, perforated screens come into play. Made from high-quality stainless steel, they provide both high filtration precision and long-term durability thanks to their perforated surface. They run continuously with an automatic cleaning mechanism, keeping clogging risk minimal and maintenance needs very low.
WORKING PRINCIPLE
When wastewater enters the screen chamber, the flow is directed to the perforated surface. The perforated plate system has holes (perforations) with 2–10 mm diameters. As wastewater passes through these holes, particles larger than the hole diameter are retained on the surface. While the perforated screen rotates, mechanical scrapers or brushes clean the retained solids and transfer them to the discharge trough. The process is fully automatic and operates on time or differential level control. Perforated screens are positioned at the plant inlet before the process stream. Their compact design allows integration into existing channel systems or package-type pretreatment units.
DESIGN FEATURES
Hole diameter
Optimized between 2 – 10 mm depending on the application.
Surface type
Perforated plate
Material
AISI 304 or AISI 316 stainless steel
Drive system
Gearmotor with chain or belt-driven drum
Cleaning system
Mechanical scraper, brush or washing nozzles
Operating mode
Time-controlled, differential level controlled or continuous operation
Odor control
Optional enclosed design with ventilation connection
Installation type
In-channel, above-channel or integrated into a compact tank
ADVANTAGES
High separation precision
Particle retention down to 2 mm
Fully automatic operation
Continuous cleaning and uninterrupted process
Low maintenance need
Durable surface and self-cleaning structure
Compact design
Easy installation and operation in narrow spaces
Long service life
Stainless materials and high-quality drive system
Odor control
Enclosed operation option for minimal environmental impact
Energy saving
Low energy consumption with efficient motor system
APPLICATION AREAS
Perforated screens serve as the second line of protection after coarse screens in wastewater treatment plants. By removing small particles, fibrous materials and floatables, they increase the efficiency of biological and chemical treatment processes. With high durability, automatic cleaning and compact design, perforated screens offer a reliable, long-lasting and low operating-cost solution for modern treatment plants.
Municipal wastewater treatment plants
Food, beverage, textile and chemical industry wastewaters
Pretreatment lines with high solids load
Package biological treatment units
Mechanical pretreatment systems
Cooling water and process water pre-filtration
CONCLUSION
WHY PILSAN CONSTRUCTION?
Pilsan Construction’s Perforated Screen units are designed for fast installation, easy operation, low maintenance needs and long service life. Thanks to our field experience and advanced engineering infrastructure, we develop optimum solutions for each project. Pilsan’s high production capacity and quality standards guarantee surprise-free and reliable performance in the field. With additional treatment steps that can be integrated when needed and correct equipment selection, our Perforated Screen units keep effluent quality compliant with regulations even under variable load conditions. Ultimately, Pilsan Perforated Screen will be your long-term solution partner in wastewater treatment with its user-friendly interface and comprehensive technical support.