AA02B.C01
Service instruction POPR-I
Page 2/7
Executed by: AJ/CML
Issued on: 12. March 2003
Accepted by: SL/KT
Rev. date: 12 March 2021
Introduction
POPR-I is a horizontal submersible mixer. All surfaces which are in contact with the medium are made of
stainless steel.
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 an 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 propeller is installed on the output shaft of the gear. The exterior sealing system consists of a sealing ring
and a mechanical shaft seal with a grease-filled chamber in between.
The following pages describe the connection and the maintenance of mixers type POPR-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 and paper pulp, as well as chemical liquids.
The mixer can be placed in square and circular tanks and is to be applied only fully submerged below liquid
level. When the mixer is in operation, it must be fixed on the stop bracket, which is mounted on the guide rail. If
the guide rail is without a stop bracket, the mixer hangs in the wire and is stopped by a stop bracket, which is
mounted on the guide rail. If more than one mixer is fitted 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 start-up, check that the equipment is installed correctly to the mixer, as well as
the equipment in the tank.
•
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 ensured 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 verified that the propeller cannot touch the tank under any circumstances.
•
The mixer must always be fully below liquid level during operation.
•
Prior to hoisting the mixer for service/repair it is imperative that the electrical connection of the mixer is
switched off or locked out. 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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