KESSEL AG
Catalogue EN 4.1
97
Types of wastewater
The particle size of a pump specifies how many
millimetres of free passage through the pump
are available.
Lifting stations for water with sewage
EN 12050-1
Wastewater with sewage is involved whenever pipes are
connected that transport water from urinals or toilets
to the sewer. This is termed "black water".
Maximum particle size: 40 mm
Lifting stations for water without sewage
EN 12050-2
Wastewater without sewage is water without faecal
content, for example shower water or water from
a washing machine. This is termed "grey water".
Maximum particle size: 10 mm
Explosion protection
Accidents or spills could result in hazardous liquids
entering the lifting station which could result in an explo-
sion risk environment. If the possibility is real, an ATEX
explosion protected pumping system should be used.
Pump operation classification
KESSEL pumps are classified as S1 or S3 operating duty.
An S1 class pump is a continuous duty pump designed
to run without interruption, ideal for rainwater applications
or for a continuous industrial wastewater flow.
S3 operating duty pumps are intermittent duty and require
periodic breaks to stop and cool down. An S3 50%
classified pump, for example, should not run more than
50% of the time and are perfect for standard wastewater
from homes, apartments or commercial buildings.
Pump types
Macerator pumps are especially designed
for wastewater containing raw sewage.
These systems cut the wastewater into small
particles which allows connection to small
diameter pressure pipes.
Multi-vane impellered pumps are designed
for wastewater with or without raw sewage.
A large area inside the pump allows any solids
to freely pass into the properly sized pressure
pipe without contacting the impeller.
Single-channel impellered pumps are
especially designed for solids free or small
particle wastewater. The impeller design
efficiently moves high volumes of wastewater
with minimal power consumption.
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