SM/SME Series


SM-W/SME-W Series

Coating the 316 stainless steel casting propeller by spraying the tungsten carbide.
While having excellent corrosion resistance of stainless steel, it greatly enhances abrasion resistance.

Propeller wear is less than half that of stainless steel casting.

"Tungsten carbide spraying" of the propeller's vane part is adopted. The Vickers hardness of tungsten carbide is more than 5 times that of stainless steel, and wear resistance is greatly improved.

SM-W/SME-W Series


Livestock manure treatment

Uniform agitation of livestock manure

  • For use in other applications (such as factory drainage), please contact us.
For standard specifications, refer

Comparison of propeller wear Operation with No. 5 silica sand 8% mixture

Model SM SME-W
Accumulated operation time 46 hours 90 hours
Propeller diameter change(mm) 254 → 200 254 → 254
Propeller weight change -9% -5%
Change of the thrust -23% -15%
Material of propeller 316L stainless steel 316 stainless steel casting
with tungsten carbide splaying
What is tungsten carbide?

Tungsten carbide has a Vickers hardness of at least 5 times that of stainless steel and is a stable material. It resists corrosion and exhibits stable characteristics even under harsh environments.

SME-R Series

Suppresses odor generation at a low water level

The installation of an air intake pipe facilitates the air supply.


Mixing of the pump station for wastewater collection system

Load reduction in post-process (sewage treatment plant) and prevention of hydrogen sulfide generation

Mixing of temporary wastewater storage tank for public and commercial facilities

Preventing sludge deposit and scum generation

For standard specifications, refer


No blower is required as self-aspirating type
Supplying oxygen simultaneously with mixing

Submersible mixer is used as a base for supplying oxygen and simultaneously mixing.

Anaerobic mixing is also available

Throttling or stopping air also enables anaerobic mixing.

Prevent clogging

Use of sweepback blade propeller prevents foreign object clogging.

SMM Series

Energy consumption can be reduced to 1 / 2 to 1 / 3 from SM series
high speed submersible mixer, when using in the reaction tank.


Energy save mixing in denitrification tank and reaction tank.

For standard specifications, refer


SMM Series
Energy saving

Mixing of the reaction tank is realized with a slight power density of 2 to 4 W / m3.
Energy consumption can be reduced to 1 / 2 to 1 / 3 compared to SM series high speed submersible mixers.

High maintainability

The maintenance cycle is twice as long as the SM series high speed submersible mixer. In addition, it can be easily pulled up with the portable hanger pipe, reducing maintenance costs.

Smooth mixing of biological flocs

A smooth propeller shape and low blade tip speed provide gentle mixing for biological flocs and so on.

Installation on the tank wall side

Unlike other mechanical mixing systems, there is no need for structures (installation structures or inspection walkways) at the center of the tank, so the installation to the existing tank can be reduced the construction period and cost.

Energy save mixing (Compare in the 11m x 6m x 6m (water height) reaction tank)

Compare with same number of SM series high speed submersible mixer


Compare with same power SM series high speed submersible mixers


Compare with same number of SJL series submersible aerator


Flow velocity measurement at the bottom of reaction tank(Tank capacity: 430m3 Power consumption: 630W)

Bottom velocity of 0.1 m / s achieved with a power density of 1.5 W / m3

Flow velocity measurement at the bottom of reaction tank

The strong water flow of the medium speed mixer gradually accelerates the sewage in the tank to create a swirling flow , achieving agitation of the reaction tank with a small power density.

Flow velocity measurement at the bottom of reaction tank

Distribution of biological floc particle size in reaction tank

The particle size distribution of the biological floc is equal to air diffuser system

SMM medium speed
                  submersible mixerAir diffuser system

SML Series

Generate a huge water flow using minimal energy.


  • Generating circulating water flow for Oxidation Ditch (OD) tank
  • Generation or circulation of water flow for dam and lake/bog
SMM medium speed
                submersible mixer
Computational fluid dynamics of oxidation-ditch tank
For standard specifications, refer


SML Series
Strong water flow

Using CFD / CAE analysis, adopt the high-performance propeller that enables both mixing performance and strength. In addition, a structure with a sweepback angle will prevent foreign matters from tangling and provide superb durability.

Safety design

Leakage water chamber is standard on all models to prevent water penetration to the motor. In addition, a leakage detector (optional) prevents insulation deterioration due to leakage water. In addition, adopt the cable with fiber reinforcement, core wire seal shut the water penetrating into the motor.

High maintainability

Under a hanging up condition, oil change for mechanical seal and reduction gear parts, and inspection of the immersion to the leakage water chamber are possible.

Superb reliability

Employs double mechanical seal with silicon carbide (SiC) seal faces that is proven for submersible pumps. Secured the reliability that can withstand the long-time continuous operation required for the submersible mixer. In addition, the propeller shaft is made of corrosion resistant 316 stainless steel. It exhibits reliability in a wide range of environments.

Long service life

Adopt the multi-pole motor with slow rotating speed reduces the load on the reduction gear, which realizes long service life.

Wider scope of application

The high-temperature resistant motor, which reduces temperature rise, is employed to endure liquid temperature up to 40˚C.
Liquid contact part is fully made of stainless steel for applications in wider environment such as seawater.

Propeller Selection Table (propeller cord)

Propeller outer diameter (m)
1.4 1.6 1.8 2.2 2.5
700 1023        
800 1022 1122      
850 1021        
900 *1020 / 2024 1021 1223    
1,000 2023 1120 1222    
1,100 2021 2123 1221    
1,200 *2020 / 3024 2121 *1220 / 2223    
1,300 3023 2122 2222 1322  
1,400 3022 *2120 / 3125 2221 1321  
1,500 3021 3124 *2220 / 3225 *1320 / 2324  
1,600 3020 3123 3224 2323  
1,700   3122 3223   1421
1,800   3121 3222 2322 *1420 / 2424
1,900   *3120    2321 2423
2,000     3221   2422
2,100     *3220  *2320  2421
2,300       3324 *2420 
2,600       3323  
2,700       3322 3423
2,900         3422
3,000       3321 3421
3,200       *3320  *3420


SML15 (clear water) / 22


SML22 (clear water) / 37


SML37 (clear water)

The numbers in the table, such as 1023 and 1022, indicate a propeller code.

  • To select the size of submersible mixer, calculate necessary thrust for your application and select the size which has greater thrust than calculated one. The required thrust varies depending on the shape and size of tank, and the water quality in each application, so there must have some know-how (experience and expertise) to make correct calculation of required thrust. Please contact to ShinMaywa for correct size selection.
    Propeller code marked with * cannot be used in the liquid that contains a large amount of foreign object or large specific gravity (1.03 or higher).