A basic classification can be made in order to decide about suction system specification as follows:
|
A Standard : |
MIE > 10 mj |
ST Class 1 or 2 |
|
B Specific : |
MIE 3-10 mj |
ST Class 1 or 2 |
|
C Extreme : |
MIE 1 - 3 mj |
ST Class 1 or 2 or 3 |
|
D Highly reactive: |
MIE < 1 mj |
ST Class 1 or 2 or 3 |
The Kst value is calculated as the equivalent pressure in a 1 m3 sphere from the cube law (Kst value = cube root of volume x explosion pressure rise).
The ST class is based on the Kst value as follows:
ST class 0 - Kst value = 0
ST class 1 - Kst value less than 200 bar m/sec
ST class 2 - Kst value between 200 and 300 bar m/sec
ST class 3 - Kst value greater than 300 bar m/sec
Explosion testing for Kst value & Pmax is essential to validate protection design (explosion venting, explosion suppression and explosion containment). Results of testing from our database for common dusts are shown in the table below.
| Grain dust | 89bar.m/sec | 9.3bar g | ST1 |
| Coal dust | 85bar.m/sec | 6.4bar g | ST1 |
| Flour | 63bar.m/sec | 9.7bar g | ST1 |
| Sugar | 138bar.m/sec | 8.5bar g | ST1 |
| Wood dust | 224bar.m/sec | 10.3bar g | ST2 |
| Aluminium dust | 515bar.m/sec | 11.2bar g | ST3 |
| Sewage sludge | 102bar.m/sec | 8.1bar g | ST1 |
| GRP dust | 216bar.m/sec | 7.6bar g | ST2 |
沃瓦克工业吸尘器清除了我们产品内部的铝屑提高了产品的洁净度，这是满足产品严格质量标准的关键要素。
在使用了集定制吸嘴与自动启停装置为一体的DS1221吸尘器之后，产品的质量得到了很大的提升而且设备的性能远远优于之前其他厂家的设备。 RUWAC的解决方案是根据我们的要求量身定制。 设备的质量和使用寿命以及RUWAC中国区的服务说服了我们。
因此，我们扩展了双方的合作，并将更多Ruwac的设备安装到其他生产线上，效果非常好。
博世汽车转向系统金城（南京）...
