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Screw Screen

Model SS-mK or SS-oK [-mK denotes with compaction and –oK without compaction]

The screw screen provides screening of solids from raw sewage or from wastewater in industrial applications. The screw screen is designed for installation in a concrete channel. As standard the system includes compaction of screenings and washing in the compaction zone.

The compactor, located at the end of the transport section of the screw, carries out the compaction and dewatering of screenings to reduce the weight and volume of captured screenings.

ADVANTAGES

  • Low maintenance and low initial investment
  • Self-cleaning with brushes fitted on the screw
  • High solids removal efficiency
  • Up to 50% reduction in volume & weight of screenings after compaction
  • Transport section: tubular or U-section
  • Transport section: longer/shorter lengths available

MANUFACTURING FEATURES

  • Inlet flow rate; up to 1,250 m3/h
  • Screen element options;
    • Rounded holes 3-10mm
    • Wedge wire 0.25-3mm

STANDARD SPECIFICATIONS

Parameter Units SS-mK-110  SS-mK-160  SS-mK-260  SS-mK-390  SS-mK-610  SS-mK-830  SS-mK-1000 
Treatment capacity*1  With rounded holes  Ø3 m3/hr 80 122 158 320 502 690 865
Ø4 93 137 218 360 528 756 920
Ø5*2 108 158 259 390 612 830 1,000
Ø6 126 164 288 430 630 850 1,070
Ø7 137 183 310 468 730 905 1,160
Ø10 158 194 333 495 790 970 1,250
With wedge wire 0.25 mm 17 34 75 115 180 220 290
0.5 mm 45 64 95 170 300 340 385
1 mm 50 81 135 252 350 430 590
2 mm 85 100 145 303 430 580 785
3 mm 112 125 187 340 505 730 900
Dimensions W - Channel min/max mm 300/477 358/542 470/620 570/718 740/888 875/975 1,065/1,167
35˚ 410 420 430 550 660 800 860
45˚ 515 535 540 705 838 985 1,050
A*3 5,124 5,124 5,124 5,124 6,040 6,040 7,840
B 4,075 3,975 4,044 3,990 4,512 4,510 4,680
C 3,040 2,990 3,035 2,980 3,735 3,770 3,650
D 800 800 800 800 1,000 1,000 1,000
S 1,500 1,500 1,500 1,500 1,500 1,500 1,500
Installed motor power kW 0.75 0.75 0.75 0.75 0.75 0.75 1.1
Screw gear reducer speed 11 11 11 11 8 8 8
Screw inclination deg˚ 35 to 45 35 to 45 35 to 45 35 to 45 35 to 45 35 to 45 35 to 45
Empty weight kg 300 318 325 350 608 642 1,100

*1Theoretical, calculated using clean water, *2Standard screen type & aperture, *3Transport section can be lengthened or shortened, which will affect other dimensions.

 

STANDARD INCLUSIONS + OPTIONS

Equipment Standard Supply Optional Supply
Screw screen  Rounded holes screen element Ø5mm aperture -
Custom aperture (3, 4, 5, 6 ,7 or 10mm) -
Wedge-wire screen element (0.25, 0.5, 1, 2 or 3mm) -
Integrated screenings compaction -
Screen basket cleaning, bolted nylon brushes -
PE pipe for returning liquid from compaction zone -
Squared outlet spout -
Bolted screenings compaction system cover -
Lifting eyebolts -
Nord drives with compact motor gearbox and cover guard -
Machine carpentry, drive guard and anti-wear materials on screw SS304L, bolts A2 (SS304) -
SS316L, bolts A4 (SS316) -
Screw High-carbon steel painted -
SS304L -
SS316L -
Washing*1 Compaction zone only, with ½” manual valve -
Compaction zone with ½” manual valve and screening basket with 1” manual valve -
Manifold for compaction zone and screening basket, with 1” manual valve -
Automatic Longopac bagging system for screenings with 1x 80m long bag -
Drive motor premium efficiency IP55  -
IP65 with thermistor overload protection -
Surface treatments*2 -

*1Washwater requirement: 3 bar, 23L/min *2Stainless steel parts: stripping with acid solution, passivation with glass particles, final surfaces cleaning with anti-dust oil. Carbon steel parts: sandblasting SA 2.5 for external anti-rust paint RAL 5015

 

Instrumentation & Controls Standard Supply Optional Supply
Level sensor, supplied loose for channel installation Conductive probe -
Ultrasonic -
Solenoid valve kit(s) for selected washing system(s) -
Control panel to AS/NZ 3000, for external installation -