4000 SERIES PUMPS

Rising to the mixing challenge

All mixing applications require varying degrees of both small-scale turbulence and bulk flow. With a good bulk flow, the contents of the entire tank are set into motion involving in the mixing process. The strength of the bulk flow is, in turn, dependent on the total amount of installed thrust and layout.

Unparalleled expertise, broad mixing solutions

Flygt pioneered the use of thrust as the main performance parameter for mixing. And every day, we put more than 50 years of R&D expertise and practical experience to work to determine the right technology, mixer size and layout for your requirements.

Our comprehensive portfolio of mixers and agitators cover virtually every requirement. Hundreds of thousands of Flygt mixers and agitators are in service worldwide, delivering efficient mixing performance.

Flygt compact mixers

Engineered for flexibility, versatility and lean installation, these space-saving mixers offer highly efficient solutions for any tank shape and size.

Our compact mixers easily blend highly contaminated fluids high-density or high-viscosity liquids, and liquids with fibrous material. Few components, low capital investment and straightforward service routines make Flygt compact mixers the economical choice for a broad range of mixing applications, like:

• 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

• Quencing tanks

Designed for high reliability

For decades, we have been at the cutting edge of mixer research and development. Flygt compact mixer components contribute to reliable operation, reduced energy costs and efficient mixing.

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.

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 allowhighly fibrous material to pass through. Wide-hub design deflects fibrous material.

Dependability starts with attention to detail

1 Cable entry

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

2 Oil housing

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

3 Monitoring

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

4 Bearings

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

5 Motor

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

6 Propeller

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

SUBCAB^®

Heavy-duty submersible rubber cable.

SUBCAB^® Screened

Heavy-duty submersible rubber cable for use with VFD and to limit electromagnetic interference.

Special cables

Withstand high temperatures, high voltage and chemical agitation.

Leakage sensors

Automatically detect, together with external monitoring equipment, any leakage in stator and oil housings.

Extended jet ring

For improved motor cooling in viscous liquids.

Flygt MiniCAS supervision

Provides quick and easy equipment protection by monitoring thermal overload switches and leakage detectors.

Explosion-proof versions

For use in potentially explosive or flammable environments.

High chromium cast iron propeller

Withstands severe abrasion resulting from mixing hard mineral slurries.

Silicone carbide (RSiC) seal

Provides excellent abrasion resistance and superior resistance against acid and chloride liquids.

Boost efficiency with monitoring and control

We supply everything from controllers, sensors and start equipment to SCADA software for complete fluid handling supervision.