DAGYEE Externally Fed Rotary Drum Screen - Industrial Wastewater Pretreatment & Filtration

Product Item：DSS

Externally Fed Drum Screens

Capacity:20-200m3/h

MOQ:1SET

Function:Solid liquid seperator

Description

DAGYEE Externally Fed Rotary Drum Screen: Advanced Solids-Liquid Separation for Demanding Application

Externally rotary fed drum screen description

The DAGYEE Externally Fed Rotary Drum Screen is a robust, continuous-operating mechanical filtration system designed for the efficient removal of fine suspended solids from wastewater and process water streams. Unlike internally fed designs, our screen utilizes an external feed principle, where liquid is distributed over the external cylindrical surface of a rotating drum covered with a precision screen panel. This design offers superior handling capacity for high-flow, high-solids-load applications, making it an indispensable component in modern industrial and municipal pretreatment processes.

Externally rotary fed drum screen principle

External Feed: The untreated wastewater flows by gravity or is pumped onto the upper exterior surface of the slowly rotating drum.
Screening & Filtration: As the drum rotates, the liquid passes through the screen panels (with aperture sizes typically ranging from 0.25mm to 3mm), while suspended solids are retained on the outside surface of the drum.
Automatic Cleaning: A bank of high-pressure spray nozzles, installed inside the drum at the top, continuously blasts the interior of the screen panels. This creates a reverse flow that dislodges trapped solids, ensuring uninterrupted operation and preventing screen blinding.
Discharge & Effluent: The cleaned solids are washed into a integrated collection hopper for disposal or further processing. The filtered effluent collects inside the drum and discharges from one or both ends.

Externally rotary fed drum screen model

Industry Type	Slot (mm)	RDS03/300	RDS06/400	RDS06/700	RDS06/1000	RDS06/1300	RDS06/1600	RDS08/2000	RDS08/2500
Paper Industry	0.5	6	20	40	60	80	100	130	190
Slaughter House	0.5	4	15	30	45	60	75	95	130
Seafood Industry	0.75	5	17	35	50	70	90	110	140
Meat Industry	0.75	6	20.5	40	60	80	100	130	190
Meat Industry	1.0	7.5	25	50	75	100	125	150	220
Vegetable Industry	1.0	12	40	75	110	150	180	220	330

Externally rotary fed drum screen advantage

The external feed design allows for a large effective screening area to handle peak flows and heavy solids loads with high removal efficiency.
The internal high-pressure self-cleaning system ensures continuous, unattended operation, minimizing downtime and maintenance labor.
Constructed primarily from grade 304 or 316 stainless steel for all wetted parts, ensuring exceptional corrosion resistance and long service life in harsh environments.
Available in various drum diameters, lengths, screen aperture sizes, and construction materials to meet exact application specifications.
Energy-efficient drive system and efficient cleaning reduce water and power consumption compared to other screening technologies.
By removing fine solids at the headworks, it significantly reduces the load on downstream processes like biological treatment, clarifiers, and membranes, lowering overall plant operational costs.

Externally rotary fed drum screen feature

1. All 304 stainless steel construction.

2. Headbox with overflow protection.

3. Solid unitary frame.

4. Wedge wire drum.

5. Doctor blade assembly with Monel blade.

6. Internal spray bar.

Why Choose DAGYEE?

We don't just manufacture equipment; we provide separation solutions. Our engineering team analyzes your water composition and process goals to recommend the optimal screen specification.
Utilizing advanced fabrication and welding techniques, we ensure every drum screen meets precise tolerances for smooth operation, balance, and durability.
Every unit undergoes rigorous factory acceptance testing (FAT), including rotational run-off and spray system checks, before shipment.
From installation supervision to operational training and spare parts supply, DAGYEE provides comprehensive after-sales support to guarantee your system's performance.
We focus on delivering long-term reliability and lowest total cost of ownership, not just the lowest initial price.

Externally rotary fed drum screen application

Primary treatment/fine screening for municipal wastewater treatment plants.
Pretreatment for industries such as Food & Beverage (meat, dairy, vegetable processing), Pulp & Paper, Textile, Chemical, and Petrochemical.
Solids removal for cooling water systems, process water recycling, and water reuse schemes.
Screening of stormwater runoff and combined sewer overflows (CSOs).
Removal of suspended waste in recirculating aquaculture systems (RAS).