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Externally Fed Rotary Drum Screen

Name: Externally Fed Rotary Drum Screen Filter | AQUIPTEC
SKU: SKU_203-6

Solids Handling, Screening & Sludge Treatment Equipment

The Externally Fed Rotary Drum Screen is a filtration system that removes fine solids from wastewater. It uses a rotating drum with a fine mesh to capture particles while allowing water to pass through. It runs continuously, so it works steadily with little need for manual input. The system cleans itself automatically using backwashing or optional brushes, which helps prevent clogging and keeps performance consistent. Its compact design makes it ideal for sites with limited space, and the stainless-steel construction ensures durability. With low energy use and easy maintenance, it provides a reliable and cost-effective solution for solid-liquid separation across various applications.

1. What is an externally fed rotary drum screen?

An externally fed rotary drum screen is a filtration system that removes suspended solids from wastewater using a rotating drum fitted with a fine mesh screen.

2. What are the main benefits of an externally fed rotary drum screen?

It filters the water perfectly, has continuous operation, uses minimal energy, and has an automatic self-cleaning design.

3. Where can this machine be used?

Externally fed rotary drum screen is used in municipal wastewater treatment, food processing (like poultry processing), pulp and paper mills, the textile industry, and aquaculture to remove fine solids and protect downstream equipment.

4. Does the system require frequent cleaning?

No, the externally fed rotary drum screen includes an automatic spray or backwash system that cleans the screen during operation, helping prevent clogging and maintaining performance.

Serviceable range	Solt	RDS03/300 (m³/h)	RDS06/400 (m³/h)	RDS06/700 (m³/h)	RDS06/1000 (m³/h)	RDS06/1300 (m³/h)	RDS06/1600 (m³/h)	RDS06/2000 (m³/h)	RDS08/2000 (m³/h)	RDS08/2500 (m³/h)
Size	mm	3000×300	610×400	610×700	610×1000	610×1300	610×1600	610×2000	610×2000	610×2500
Municipal sewage	1	N/A	60	100	150	200	240	300	450	560
Paper industry	0.5	6	20	35	50	65	80	100	150	185
Seafood industry	0.75	5	17	30	42	55	68	85	125	160
Meat industry	0.5	4	15	25	38	50	60	75	110	135
Meat industry	0.75	6	20	35	50	65	80	100	150	185
Meat industry	1	7.5	25	45	62	83	100	125	185	235
Fruit and vegetable	1	12	40	70	100	100	160	200	300	375
Driving power	kw	0.18	0.37	0.55			0.75		1.1
Output speed	rpm	18	10
Length (L)	mm	860	1000	1300	1600	1900	2200	2600	2650	3100
Width (W)	mm	1020	1520							1680
Height (H)	mm	1050	1600							1950
Water out height	mm	350	500							650
Water inlet flange	DIN	DN65	DN80	DN100	DN150			DN120		DN250
Water outlet flange	DIN	DN100	DN150			DN200		DN250		2×DN200
Backwash nozzle	G	G1/2″
Vent nozzle	3A	φ2″
Slag notch	DIN	DN100	DN150				2×DN150
Net weight	kg	41	76	95	109	123	142	164	205	245
Operating weight	kg	68	136	164	196	232	273	327	409	491

Features

Standard Features

SS304 stainless steel construction (SS316 available)
Integrated, compact frame with sealed cover to control odour and spillage
External spray cleaning system with timed backwash
Variable-speed drum via VFD (approx. 4–20 rpm)
Automatic solids discharge system
Service-friendly access to key components

Options & Accessories

Mesh sizes ~10–1000 µm
Brush assembly for fibrous loads
Wash pump skid; CIP connections
Local control panel; level/flow interlocks
Support stand, discharge chute, bagging adaptor

Working Principle

Influent spreads over the external drum surface, where a fine mesh retains suspended solids. As the drum rotates, retained solids are conveyed to the discharge zone and removed by the scraper/unloader. A time-controlled spray bar backwashes the mesh to prevent clogging and maintain flow. The integrated drive (typ. ~4–20 rpm via VFD) allows process tuning for varying loads.

Key Benefits

High filtration efficiency: Removes fine particles down to ~10–50 µm for clear filtrate.
Continuous, automated operation: Rotary drum delivers steady filtration with minimal manual intervention.
Low energy consumption: Simple mechanics and efficient hydraulics reduce power use.
Self-cleaning: Timed spray/backwash or optional brush prevents clogging and maintains throughput.
Compact footprint: Space-saving design suits retrofits and tight plant rooms.
Durable construction: Corrosion-resistant stainless steel for long service life.
Low maintenance: Easy access to wear parts shortens service time.
Versatile applications: Trade wastewater, municipal, aquaculture, and stormwater.