CentrifugationPusher / SP

SP プッシャー

Crystal dehydration and washing without fracture


Pusher™ is a centrifugal filter consisting of two cylindrical baskets with metal screen that are horizontally installed on a driving shaft. Slurry with crystals or pellets is fed on the inner basket, and the solids are kept on the screens and move towards the end of the outer basket by oscillation of the inner basket. They are dehydrated to a low moisture content and discharged from the outer basket. It is possible to minimize damages on the solids, since the first basket oscillating with short stroke gradually pushes bulk of the solids, not individually. Thus, this model is ideal for treatment of crystals and pellets to avoid damages to fragile particles. In addition, even when processing hard crystals, wear of the screens and conveying parts are lower than other filters, resulting in longer maintenance periods and stable processing.
This model is also available for washing solid form impurities by showering clean water or rinsing solution during the solids moving on the basket screens, and it has a function of dewatering and washing solids at the same time. This is an ideal device for dehydration and washing of resin and nylon pellets of 0.1mm or larger, ammonium sulfate, salt, etc.


1. High-speed dehydration with high centrifugal force
Low moisture content is achievable in 5 or 10 seconds by applying centrifugal force as high as 600 G. This model is a compact and highly productive dehydrator for crystals and pellets.
2. Low damage dehydration of solid of 0.1mm or more
The solid conveying mechanism of “Pusher” provides minimized damages on the particles due to the moderate motion of the solids on the screen by short stroke oscillation of the inner basket. This model is suitable for dehydrating and washing black sesame seeds, soft salts, etc.
3. Effective crystal washing treatment
Particles with impurities are washed by showering clean water or rinsing solution on the particles on the baskets after the primary dewatering is performed. The particles near the screen are exposed on the surface of the bulk, as the bulk is disturbed when the particles drop from the inner basket to the outer basket. Thus, the particles are washed quickly and completely.
4. Long life screen and pushing plate even with high hardness crystal treatment
Friction acting on mechanical parts are low, as the end of the inner basket pushes the particles on the screen in vertical direction of the basket’s end surface. Few friction acts on the basket’s end resulting in reduction in wear of the conveying parts largely. In addition, the wedge wire screen applied to this model has excellent wear resistance. Thus, this model is durable for hard crystal dehydration.
5. Easy maintenance and low running cost
The parts needed maintenance are few and last long. In addition, due to its simple mechanical structure, maintenance is easily performed on the installation site. The maintenance is, therefore, carried out at low cost and in a short time.

Structure and Mechanism

SP プッシャー構造

This machine consists of a large (outer) and a small (inner) basket, and wedge wire screens are installed inside the baskets. A slurry is fed to the accelerating hopper via the supply pipe and is carried to the inner basket. Then the particles in the slurry are scattered on the screen and are instantly dehydrated. The particles overflow from the inner basket and drop on the outer basket. The inner basket oscillates back and forth in the axial direction. This motion helps particles’ move of the overflowing from the inner basket and pushes the particles on the outer basket towards the basket end. During the particles move on the screens, they are dewatered rapidly. In addition, impurities on the particles are washed out by spraying a rinsing solution to the screens.

Application example

Food stuff Organic chemicals Inorganic chemicals
・Salt ・Nylon chips ・Ammonium sulphate
・Amino acids ・Fluorine rubber ・Sodium sulphate
・Cellulose ・Polystyrene ・Sodium formate
・glycine ・ABS resin ・Sodium carbonate
・Arginine ・SA resin ・Soda metasilicate

※In addition, it is suitable for separation-dehydration of a broad range of solid particles of 0.1 mm or more. Please feel free to contact us if you have any questions.

Standard Specifications

Pusher lineup
Model Nominal Capacity
Motor power Centrifugal
G Effect (G)
Weight (kg)
Dimensions (mm)
Main Hydraulic Length Width Height
SP250 2.5 5.5 2.2 600 700 1750 900 1000
SP350 4.5 7.5 3.7 600 900 1850 1040 1050
SP450 8 15 7.5 600 1800 2200 1300 1330
SP600 15 22 11 600 3000 3400 1560 1570
SP800 25 45 18.5 600 4000 3600 1850 1920