Supersonic Jet Mill Model PJM
Synergistic effect of "Return Hole” mechanism.
～Increased grinding and classifying efficiency～
Principle
- Pulverization by particle-to-particle collisions in supersonic swirling flows with theoretical flow velocities greater than Mach 2.5.
- The return hole mechanism (NPK original) actively causes the re-accelerated coarse particles to collide with each other, thereby increasing the grinding efficiency.
- The classifier mechanism in the grinding chamber ensures that only the ground product below a certain particle size ins discharged from the jet mill together with the air.
- The N TYPE is equipped with an upper classifying chamber so that the classified coarse grains are fed into the grinding chamber through a special nozzle and repeatedly ground.
Features
- Interchangeable grinding nozzles to suit materials properties － Highly efficient grinding and disintegration (BF nozzle, low pressure nozzle, etc.) .
- Special grinding chamber geometry for skillful classification － Sharply ground and disintegrated products are obtained.
- Particles collision grinding method － Very low contamination
- Gas Circulation system (option) － Atmosphere control with special gases (He, N₂, etc.)
- No moving parts in the grinding section － Easy to maintain and clean
- Adiabatic expansion effect of compressed gas － Capable of grinding low melting point or weakly heat-resistant materials.
Specifications
| Model |
Comp. air consumption [Nm³/min] |
Compressor power [kW] |
Comp. air supply port diameter [－] |
Exhaust port diameter [－] |
Weight [kg] |
| PJM-80 | 0.5 | 5.5 | Φ12tube |
1.0S ferrule |
11 |
| PJM-100 | 1.9 | 15 |
1.25S ferrule |
40A ferrule |
30 |
| PJM-200 | 2.8 | 22 |
1.5S ferrule |
65A ferrule |
65 |
| PJM-280 | 4.7 | 37 |
1.5S ferrule |
90A ferrule |
82 |
| PJM-380 | 7 | 55 |
2.5s ferrule |
100A ferrule |
186 |
| PJM-510 | 12.5 | 75 |
65A JIS10K flange |
150A ferrule |
288 |
Optional Specifications
| 1. | Antifriction Specification | The materials of high hardness or elastic-resinous surface coating on the powder contacting parts can be applied. |
| 2. | Adhesion Resistant Specification | Surface coating with a material of low coefficient of friction on the powder contacting parts can be applied. /gas heating. |
| 3. | Overgrinding Prevention | Selection of the nozzles, which provides the optimum classification flow rate and controls the pulverization power. |
| 4. | Ultra Fine Pulverization | Application of gas, which increases the pulverization power. |
|
5. |
Medicine Application | Selection of Surface finishing / GMP specification |
| 6. | Automatic Opening and Closing of Upper Casing | Opening and closing of the upper casing for the large models became very easy. |
|
7. |
MJM Type Specification |
There are few components 80% in Comparison with the conventional crusher. The machine is most suitable for the embodiment in the Isolator. |
Application Examples
