GK 60 Hz

GK 60 Hz

The electric submersible sewage pumps have been specially designed to operate submerged in the pumped fluid.

The hydraulic section is close coupled to the electric motor making the pumping unit compact, easy to install and reliable in operation.

The pumps are essential in depuration systems and are widely used in the sewage handling facilities of industry and local communities.

The GK series electric pumps are designed to pump sewage containing gas, compacted solids and long fibrous material.

The pumps can be supplied for fixed or submersible installation with base frame.

The design has paid particular attention to achieving a good overall efficiency to ensure that the pumps are as cheap as possible to run.

MOTOR

Asynchronous, three-phase with squirrel-cage rotor.

The motor is cooled by the fluid in which it is submerged or by a forced cooling system.

The motor is separated from the pump by a large chamber partially filled with oil

that acts as a lubricant for the mechanical seals and as a heat exchanger.

Ensure compliance with the minimum head value given with the dimensions of each individual electric pump in order to ensure that the motor is

correctly cooled, the exception being made for motors with forced cooling.

SUPPORTS

The shaft of the motor, on the extension of which the impeller is mounted, is guided by two bearings prelubricated with grease; the lower one

supports the axial thrust.

The rotating assembly is very compact, with a short overhung pump shaft which reduces bearing loads and ensures reliability and long life.

MECHANICAL SEALS

The double mechanical seal (mounted in series) is a dual protection safeguarding the electric motor.

If the seal on the pump side becomes faulty, the motor will not be damaged thanks to the second seal on the motor side.

These seals are made of particularly suitable materials able to withstand heavy-duty conditions; the pump side seal is made with abrasionproof

materials.

SAFE OPERATION

- The conductivity sensor in the oil chamber warns if there is water and transmits the relative signal to the appropriately preset electric panel.

This checks that the mechanical seals on the pump side operate correctly.

- The motor is equipped with thermal probes connected in series in the stator winding.

Should over-temperature conditions occur, the probes automatically cut off the power.

Electric pumps of the GK series feature three different hydraulics with the following characteristics.

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RETRACTED VORTEX IMPELLER

The impeller o

ffers reliability against clogging due to the feature of wide through passages, and a good

resistance to wear thanks to the absence of shimming. The versatility of use compensates for this impellers

somewhat lower efficiency. The impeller can be reduced in dimension to offer different characteristics.

For water containing a large amount of solids and long fibre, sewage with a high gas and sludge content.

GKV

GKC

GKN

SINGLE-CHANNEL IMPELLER

It o

ffers reliability against clogging and features wide through sections and a good resistance to wear, low

mechanical action on the fluid, high hydraulic efficiency.

Particularly suitable for clean water, water containing solid and fibrous solids, cloacal water, sewage and

sludge.

Low vibrations thanks to the dynamically balanced impeller.

DOUBLE CHANNEL IMPELLER

It o

ffers reliability against clogging and features wide through sections and a good resistance to wear, low

mechanical action on the fluid, high hydraulic efficiency.

Particularly suitable for clean water, water containing solid and fibrous solids, cloacal water, sewage and

sludge.

Low vibrations thanks to the dynamically balanced impeller.

SHREDDER

Made of very hard stainless steel, the shape of the shredder ensures long-life and fade-free shredding

capacity.

Waste water disposal from gas stations, community housing and neighbourhoods.

No particular tools are required to replace this part.

GKG

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