Dewa Chain Scraper System

DEWA chain scraper system is reliable and user-friendly solution for rectangular settling basins. They can be used in various applications, such as, water and wastewater treatment, API oil-water separation, storm water treatment, and desalination.

DEWA chain scrapers can be built one on top of the other in 2 – 3 layers, and are applicable for rectangular basins up to 100m long and 12m wide. DEWA chain scrapers are available in two/three- shaft (bottom or surface) or 4- shaft (bottom and surface) configurations, depending on the clarifier type. 

DEWA chain scraper system includes unique tensioning system, that allows chain tensioning without draining tank. This saves time and resources, and makes it the most operator friendly solution. System is tightened above of the water level with a simple screwing system. DEWA tensioning system prevents misalignment faults, which are caused if chain gets loose. Tensioning system can be equipped with automatic tensioner and sensor indicators. These features are convenient when sludge collector is totally under the water, and it is not visible for the operator.

DEWA chain scraper is designed to operate for decades. DEWA systems are made of high quality, non-corrosive components. High-grade plastic and stainless steel components make the system robust and reliable. Safety components, such as overload and flight run indicators, enable safe and comfortable use for operators. 

For floating scum collection, DEWA provides rotating, tubular, skimmer system DEWA Scum pipe. The actuation of the scum pipe can be manual or automatic. DEWA Scum pipes are made of stainless steel.

Thanks to our professional partners who appreciate quality and reliable products, there are over a 2 000 DEWA sludge and scum removal systems in operation throughout the world.

Key Features

• Efficient footprint compared to circular basins
• Low energy consumption
• Can be built top of each other
• High removal efficiency
• Low wearing rate
• Low maintenance cost
• Long life span
• Light weight
• Durable and non-corrosive components.

CSS Dimension Table

CHAIN
Type
Pitch
Repture Load
Working Load
Weight
Standard
L-K 160
160 mm
24 kN
13 kN
2,0 kg/m
Medium duty
L-K 160MD
160 mm
35 kN
18 kN
2,3 kg/m
Heavy duty
L-K 160HD
160 mm
40 kN
21 kN
2,4 kg/m
SCRAPER FLIGHTS
Type
Material
Dimensions
Max Length
C-180
C-Channel
Glass fibre
80x180 mm
Up to 10 m
C-220
C-Channel
Glass fibre
100x220 mm
Up to 12 m
C-330
C-Channel
Glass fibre
100x330 mm
Up to 8 m
SPROCKETS
Material
Type
Head Shaft
UHMWPE
Z=8 / Z=12
Idler Shafts
UHMWPE
Z=8 / Z=12
SHAFTS
Material
Type
Head Shaft
AISI 304L/316L
HS-150/200
Tension Shaft
AISI 304L/316L
TS-150/200
Idler Shaft
AISI 304L/316L
IS-60/70
BEARINGS
Material
Type
Head Shaft
UHMWPE
Slide bearing
Idler Sprocket
UHMWPE
Slide bearing
RAILS
Material
Type
Return rail
AISI 304L/316L
Z-profile
Floor rail
AISI 304L/316L
I-profile
DRIVE UNIT
Type
Type
Helical Bevel Gear
DRIVE SPROCKETS
Type
Material
Drive Sprocket
1'' Z=21
AISI 304/316
Driven Sprocket
1'' Z=45/60/75
AISI 304/316
Drive Chain
1'' Roller Chain
AISI 304/316
FITTINGS
Material
Hardware
AISI 316

Contact information

ECONET LTD
Malminkaari 5
FI-00700 Helsinki, Finland 
Phone: + 358 9 8366 250
E-mail: info(a)econetgroup.fi
Business ID: 2438595-3

 

DEWACO LTD
Raviraitti 3
FI-23800 Laitila, Finland
Phone: +358 2 461 800
E-mail: info(a)dewaco.fi
Business ID: 2221862-5

 

OY SLAMEX AB
Asentajankatu 4
FI-15520 Lahti, Finland
Phone: +358 9 343 6200
E-mail: slamex(a)slamex.fi
Business ID: 0114021-6

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