External Mount Rotary Drum Screen | Industrial Wastewater Pre-Treatment System

Rotary Drum Screen External Description

It is an externally fed rotary drum screen designed to provide efficient and reliable solids separation in a wide range of wastewater treatment applications. Ideal for municipal headworks, industrial process water, and sludge screening, the unit delivers high-performance screening with minimal operator attention. Its rugged stainless steel construction and enclosed, self-cleaning design ensure long-term durability and cleanliness, even in demanding environments.

As wastewater flows over the drum’s exterior surface, solids are retained while liquid passes through the screen openings. The rotating drum is continuously cleaned by an internal spray system, maintaining open screening surfaces and maximizing throughput. The captured solids are conveyed to discharge, leaving screened effluent ready for downstream treatment. With a compact footprint, customizable screen sizes, and low maintenance requirements, the Screenmaster ES offers a simple yet effective solution for enhancing plant efficiency and protecting downstream equipment.

Rotary Drum Screen External Function

The screen is externally fed so that influent is directed under a baffle, then upward and over the length of the cylinder. The natural action of wastewater cascading through the screen creates a powerful backwash, which results in a continuously clean surface. Solids are caught on the outside of the screen surface and are removed by a tensioned doctor blade.

Opening sizes are available from 0.010" (.250 mm) to 0.100" (2.54 mm). Capacities range from 60 GPM (13.6 M3/H) to 7800 GPM (1771 M3/H) in a single unit. Additional models are available to handle higher capacities.

Rotary Drum Screen External Advavtage

• Self-cleaning wedgewire drum screen
• with doctor blade works 24/7 to reduce operator attention
• Counter weighted primary doctor blade
• needs no adjustments and reduces maintenance 
• Automatic Doctor Blade Cleaner (ADBC)
• cleans primary doctor blade
• Stainless steel construction
• improves screen life and durability 

Rotary Drum Screen External Feature

• Slot width: 0.25 ~ 2.50 mm
• Wedge wire filter with so-called “slot zero” to ensure drum resistance
• Screen in 304 L / 316 L SS 

Rotary Drum Screen External Application

This advanced solid-liquid separation device is designed for continuous and automatic removal of debris in wastewater treatment processes. It is ideal for:

Municipal wastewater treatment plants
Residential and community sewage pretreatment systems
Pumping stations, waterworks, and power plants
Industrial wastewater treatment across sectors such as: textile, printing and dyeing, food processing, fishery, papermaking, winemaking, slaughterhouses, leather factories, and more.