Page 38 - C:\SAME\OneDrive - S.A.M.E. Water\Documents\Flip PDF Professional\2020 Catalouge Mail-compressed\

VORTEX DEGRITTER

Description Performance & Speci cations
GRIT REMOVAL SYSTEMS

The most common degrit system in South Africa is the vortex tank or chamber type, a circular Vortex Degritter- Estimated Flow Rates
continuous ow-through vortex grit settling chamber. This chamber is sized according to peak
ow conditions. The chamber consists of an upper separation section where, because of reduced • We manufacture to suit non-standard openings
ow velocity in the tank, the grit will settle into a lower chamber. The settled grit in the lower • All dimensions in mm
chamber is then removed by an air lift pump, self-priming pump or submersible grit pump. The • Table data subject to change to suit civil and ow conditions
grit is further pumped into a grit classi er where washing and water separation is carried out. • Inlet Speed 0.6 - 1 m/s
• Stay Time 60 seconds
The air lift pump, mounted above the grit chamber, uses periodically dedicated blower air,
compressed air and wash water injection to move the grit slurry through the pipeline and into a
grit classi er for further processing. BLOWER
The Self-priming grit pumps, mounted above grit chamber, has a tungsten coated recessed GRIT REMOVE
impeller that operates periodically, extracting grit from the lower chamber. The pumped grit slurry IMPELLER FLOW PUMPST PARTICA BLOWIN
is fed through the pipeline and into a grit classi er for further processing. CAPACITY POWER ARTING
MODEL SPEED DISCHAR LS G RATE PRESSUR POWER
Submersible grit pumps, mounted in the lower grit chamber, have a submersible tungsten coated (mm³/h) (rpm) (Kw) GE (TIME/D PROPERT (mm³/m E (Kpa) (Kw)
body and impeller which operates periodically, extracting grit from the lower chamber. The (mm³/h) AY) Y
pumped grit slurry is fed through a ex pipeline to the top of chamber for easy removal of pump in)
via lift divert, then xed pipeline and into a grit classi er for further processing.
VDG180 180 18 1.5 34.3 ϭ͘ϱ
Application VDG360 360 12 ~ 20 0.75 ~ 1.1 Ϯ͘Ϯ
720
VDG720
VDG1080 1080 34 Proportio 2 39.2
VDG1980 1980 40 n > 2.65; 2.5 44.1 3
Wastewater treatment plants VDG3170 3170 4 (10min partical 53.9
VDG4750 4750 per time) 4
VDG6300 6300 12 ~ 20 0.75 ~ 1.5 48 diameter 2.8 58.8
VDG7200 7200 > 0.1mm
VDG9000 9000
VDG12600 12600
VDG14400 14400

Features & Bene ts $V 3HU &OLHQW 6SHF

Low operational costs
Ease of maintenance

$V 3HU &OLHQW 6SHF $V 3HU &OLHQW 6SHF ƒ

PAGE 20

www.samewater.co.za