Grundfos Submersible wastewater pump SLV.65.65 .11.2.50B

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 efficient SuperVortex
impeller provides passage of long fibres and solids up to 65 mm and is suitable for wastewater with a dry matter
content of up to 5 %. 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 SuperVortex impeller is a symmetrical multivane winglet impeller.
The design ensures a flow entirely outside the impeller providing limited contact between the impeller and the
pumped liquid.
This ensures that long fibres, rags and more passes freely through the pump without getting caught and without
causing clogging or jamming.
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.
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 designed for speed-controlled operation to keep the energy consumption at a minimum.