Flygt Compact Mixers

Overview

FEATURES
- Rated motor power range of 3.7 – 6.2 kW and thrust range of 800 – 1500 N
- Propeller diameter of 0.580 m (22.8 in)
- Compact, robust direct-drive motor
- Active Seal™ for zero leakage
- Non-clogging, fiber-handling hydraulics
- Low-cost installation

DESIGNED FOR HIGH RELIABILITY AND LOW ENERGY COSTS
Flygt compact mixer components have not only been engineered for reliable operation and efficient mixing, but to reduce
energy costs as well.

Xylem's Flygt squirrel-cage induction motor is manufactured for durability and dependability. Stator windings are trickle
impregnated in resin and rated at Class H 180 degrees C (355 degrees F) for excellent resistance to overheating.

The Flygt plug-in seal features the Active Seal system for zero leakage into the stator housing. Laser-cut grooves on the
inner seal faces act as a micro-pump to force any liquid present on the drive-unit back to the buffer fluid side. The seal housing
with the barrier fluid helps lubricate and cool the seal, ensuring efficient heat transfer even when running dry.

Engineered to generate maximum thrust with minimal use of energy, the propeller blades, with their backswept design,
allow highly fibrous material to pass through, while the wide-hub design deflects fibrous material.

It is possible to increase mixer efficiency by up to 15% in water, and even higher in viscous liquids, with the optional jet ring,
while further reducing energy consumption.

SIMPLE INSTALLATION AND MAINTENANCE
Flygt equipment is rigid enough to withstand the weight and reaction forces exerted by the mixer throughout its operating life.
It’s not only robust, but easy to maintain.

Flygt compact mixers are usually installed along rigid guide bars at appropriate depths to optimize mixing efficiency, and to help
withstand fatigue from strongly fluctuating forces within the tank. Used together with Flygt lifting equipment, guide bar systems enable
easy access for inspection and service.

Raising and lowering Flygt compact mixers with Flygt lifting equipment is as easy and convenient as it is safe. The CE-approved
lifting davit is mounted in a holder at its lower end, which enables easy turning of the davit. To reduce investment cost, one davit
can be used for several mixers.

Installation of Flygt compact mixers are ideal for use in:
- Activated sludge treatment such as conventional ASP or sequencing batch reactor
- Sludge holding tanks
- Equalization tanks
- Pump station mixing
- Grit chamber mixing
- Chlorination basins
- Paper pulp chests
- Quenching tanks
- Biogas generation tanks

Compact, robust direct-drive motor
Our squirrel-cage induction motor is manufactured at our
premises for durability and dependability. Stator windings are
trickle impregnated in resin and rated at Class H 180°C (355°F)
for excellent resistance to overheating and long service life.

Line-start permanent magnet motor
The optional line-start permanent magnet (LSPM) motor for the
Flygt 4650 compact mixer combines the efficiency of a
synchronous permanent magnet motor with the direct on-line
starting of an induction motor. This saves on current-related
costs, such as for cables and power supplies and up to 20% on
energy compared to conventional induction motors.

Oil housing
The large oil volume ensures smooth operation and long
service intervals between refills. To make service easy,
the oil plugs allow refill without removing the propeller.

Active Seal™ for zero leakage
The Flygt Plug-in seal features the Active Seal™ system for
zero leakage into the stator housing. Laser-cut grooves on the
inner seal faces, act as a micro-pump to force any liquid present
on the drive-unit back to the buffer fluid side. The seal housing with
barrier fluid helps lubricate and cool the seal, ensuring efficient
heat transfer even when running dry.

Non-clogging, fiber-handling hydraulics
Flygt compact mixers feature an efficient hydraulic design with few,
easy-to-service components, which contributes to reliable, trouble-free operation. Engineered to generate maximum thrust with
minimal use of energy, the propeller blades with their backswept
design allow highly fibrous material to pass through. Wide-hub
design deflects fibrous material.

Jet ring for higher efficiency
With the optional jet ring, it is possible to achieve an increase
in mixer efficiency by up to 15% in water – and even higher in
viscous media, while further reducing energy consumption.

Cable entry
Compressible bushing and strain relief on
the cable prevent leakage into the motor,
providing a reliable installation.

Oil housing
Large barrier fluid volume lubricates and
cools the seal and thereby prolongs
service life.

Monitoring
Thermal sensors embedded in the stator
windings prevent overheating. Leakage
sensors are available as options.

Bearings
Securely supports the shaft by means of one
main bearing at the propeller end and a double
bearing at the rear end.

Motor
High-performance, squirrel-cage induction
Class H motor provides thermal overload
protection and extra long service life.

Propeller
Available with different blade angles, thin
double curved propeller optimizes mixing
efficiency. Wide-hub design deflects fibrous
material.

Plug-in seal with the Active Seal™ system
Offers increased sealing reliability and zero
leakage into the motor, thereby reducing the
risk of bearing and stator failure.

Materials
All external parts manufactured for excellent
corrosion-resistance. Major parts in stainless
steel.

Jet ring
Optional jet ring increases hydraulic efficiency thereby reducing power consumption.
Optional jet ring increases hydraulic efficiency
thereby reducing power consumption.