Submersible Grundfos SL sewage pumps (1.1-11 kW) are fitted with an S-tube® impeller. The free passage through the pump varies from 50-100 mm depending on size.
Non-self-priming, single-stage, centrifugal pump designed for handling wastewater, process water and unscreened
raw sewage.
The pump is designed for intermittent and continous operations in submerged installation. The revolutionary S-tube®
impeller provides free spherical passage of solids up to 50 mm and is suitable for wastewater with a dry matter
content of up to 3 %. A unique stainless-steel clamp assembling system enables quick and easy disassembly of the
pump from the motor unit for service and inspection. No special tools are required.
Further product details
The pump is suitable for both temporary and permanent installation either as free-standing on ring stand or on an
auto-coupling system.
Pump
The pump housing, motor top and impeller are made of cast iron (EN-GJL-250).
All surfaces of the cast iron parts are protected with cataphoresis coating.
The surface of the cast iron pump parts is afterwards painted with environmental friendly powder coating (type NCS
9000N (black), gloss code 30, thickness 100 µm) which ensures high impact and corrosion protection.
The final pump is assembled from already painted parts which ensures that no rust or scale can be formed in grooves
between parts, etc.
The S-tube® impeller is providing free spherical passage through the impeller and pump housing and creates a
natural extension of the pipework connected to the pump.
The S-tube® impeller is a wet-balanced and tube-shaped channel impeller placed in a pump housing that matches
the smooth tube shape leaving no obstructions or dead zones.
The key to the S-tube® design is simplicity, with no cutting or moving functions that can get worn over time, thereby
ensuring constant, superior efficiency. The simple design means lower life cycle costs because abrasive wear is
reduced and there are fewer clogging incidents.
The shaft seal consists of two mechanical seals that ensure a reliable sealing between the pumped liquid and motor.
The shaft seals are incorporated in a single-unit cartridge shaft seal system that is easy to replace in the field without
use of special tools.
The combination of the primary and secondary seals in a cartridge shaft seal system results in a shorter assembly
length compared to conventional shaft seals.
– Primary seal: Silicon carbide/silicon carbide (SiC/SiC)
– Secondary seal: Carbon/Ceramics
The shaft seal is bidirectional, meaning it operates correctly in case of backflow through the pump.
The pump is approved according to CE EN12050-2.
Motor
The motor is a watertight, totally encapsulated motor supplied with a 10 m power cable. The stainless steel plug is
fastened with a union nut. This nut and the O-rings provide sealing against ingress of the liquid.
The plug is polyurethane-embedded, ensuring a watertight and durable seal around the leads of the cable. This
prevents the ingress of water into the motor through the cable in case of cable breakage or adverse handling in
connection with installation or service.
A compact motor construction with a short shaft reduces vibrations, resulting in an increased efficiency and lifetime of
the shaft seal and ball bearings.
The motor features built-in thermal protection to protect the motor against overheating and ensure the reliability.
The pump is equipped with the following sensor(s):
– A digital moisture switch that is fitted in the motor chamber monitors whether water enters the motor chamber.
If moisture is detected in the motor chamber, the switch will trip and send a warning to the sensor module.
The pump is designed for speed-controlled operation to keep the energy consumption at a minimum.
To avoid the risk of sedimentation in the pipes, we recommend that you operate the speed-controlled pump within a
speed range of 30 % to 100 % and at a flow rate above 1 m/s.
General information:
Product name: SL1.50.65.22.2.50D.C
Product No: 98624257
EAN number: 5711498427754
Technical:
Rated flow: 13.6 l/s
Maximum flow: 20.8 l/s
Rated head: 10.45 m
Maximum head: 17.7 m
Type of impeller: S-TUBE
Max. Particle: 50 mm
Primary shaft seal: SIC/SIC
Approvals: CE EN12050-2
Curve tolerance: ISO9906:2012 3B2
Cooling jacket (Yes/No): N
Materials:
Pump housing: Cast iron
Pump housing: EN 5.1301 EN-GJL-250
Impeller: Cast iron
Impeller: EN 5.1301 EN-GJL-250
Motor: EN-GJL-250
Installation:
Range of ambient temperature: 0 .. 40 °C
Maximum operating pressure: 6 bar
Type of inlet connection: DIN
Type of outlet connection: DIN
Size of inlet connection: DN 65
Size of outlet connection: DN 65
Pressure rating for connection: PN 10
Maximum installation depth: 7 m
Inst dry/wet: SUBMERGED
Installation: Vertical
Auto coupling: 96090992
Frame range: B
Liquid:
Liquid temperature range: 0 .. 40 °C
Selected liquid temperature: 20 °C
Density: 998.2 kg/m³
Electrical data:
Power input P1: 2.9 kW
Rated power – P2: 2.2 kW
Mains frequency: 50 Hz
Rated voltage: 3 x 380-415 V
Voltage tolerance: +10/-10 %
Max starts per hour: 20
Rated current: 4.7 A
Cos phi – power factor: 0.88
Cos phi – p.f. at 3/4 load: 0.83
Cos phi – p.f. at 1/2 load: 0.74
Rated speed: 2900 rpm
Motor efficiency at full load: 85.1 %
Motor efficiency at 3/4 load: 85.6 %
Motor efficiency at 1/2 load: 83.9 %
Number of poles: 2
Method of start: DOL
Enclosure class (IEC 34-5): IP68
Insulation class (IEC 85): H
Explosion proof: no
Built-in motor protection: THERMAL SWITCH
Power cable type: 07RN8-F
Length of power cable: 10 m
Power plug: No plug
Controls:
Control box: N
Moisture sensor: Y
Water-in-oil sensor: N
Others:
Net weight: 90.4 kg
Gross weight: 103 kg
Danish VVS No.: 391284173
Finnish LVI No.: 4836142