AA01A.C01
Service instruction POP-I
Page 2/7
Executed by: AJ/CML
Issued on: 01. March 1997
Accepted by: SL/TM
Rev. date: 12 March 2021
Introduction
POP-I is a horizontal submersible mixer.
During operation, the mixer is locked by a conic stop console/stop bracket fixed to the guide pipe to obtain
stability. The mixing takes place by means of an electric motor coupled to the propeller by means of a planetary
gear. The oil filled coupling/oil chamber between motor and gear is in open connection with the gear, so the oil
cools and lubricates the gear and the mechanical shaft seal between the oil chamber and the motor. The hub is
installed on the propeller shaft, the output shaft of the gear. The exterior sealing system consists of three
sealing rings with grease filled chambers between these.
The following pages describe the connection and the maintenance of mixers type POP-I.
Application
This mixer is to be used for flow creation, mixing and homogenization of liquids with a high or low dry matter
content, like e.g. wastewater, sludge, paper pulp, chemical liquids, and manure. The mixer can be placed in
square and circular tanks and is to be applied only fully submerged below liquid level. If more than one mixer is
installed in the tank, the horizontal setting between the mixers must not deviate more than a maximum of 5 °
from each other. If the mixer is to be applied for other purposes, contact Landia A/S for advice.
Warning
Please note the following points:
•
Only a certified electrician is allowed to connect the unit.
•
Prior to installation and commissioning ensure that the equipment is installed correctly and fixed to the
mixer, as well as ensure that the equipment in the tank is fixed safely.
•
Prior to the first start of the mixer, the propeller shaft must be rotated manually. This also applies if the
mixer has not been in operation for a longer period.
•
The electrical cable is always to be tightened by means of the chain to prevent the cable from getting
into contact with the propeller. If the mixer is not supplied with a chain, the cable is to be protected
against damage in another way, e.g. by means of a cable mesh.
•
It must be ensured that the propeller cannot touch the tank.
•
It is always to be ensured that the mixer is fully below liquid level during operation.
•
Prior to hoisting the mixer at service/repair, it is always to be ensured that the electrical connection of
the mixer is switched off or locked. Prior to service/repair, the mixer should be cleaned thoroughly.
•
When the mixer is hoisted or lowered, its cable and chain are always to be placed outside the work
area.
•
For service/repair of mixers installed in well/tank with explosion danger/toxic gases we refer to the
national safety directions as far as safety is concerned, e.g. concerning the toxic hydrogen sulphide.
Note before commissioning
If the machine has been installed in an empty tank for more than 1 month - and with a possible risk that the
machine has been exposed to high temperatures or direct sun
– the grease in the propeller hub and oil level in
the oil chamber must be checked/refilled. If the machine has been in storage for more than 3 months, the shaft
must be rotated manually before start-up to ensure lubrication of the sealing system.
Summary of Contents for POP-1
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