6. Bearings are air-cooled, fan-cooled and water-cooled. They are selected according to different operating temperatures of pumps. Among them, fan cooling is especially suitable for areas with water shortage or poor water quality. 3. Type Significance Flow Q: 2.5-300 m3/h Head H: 30-330 m Temperature T:-20 ~300 ~C
Category of materials |
Ⅰ |
Ⅱ |
Ⅲ |
|
Use temperature (T) |
-20℃~+150℃ |
-45℃~+420℃ |
-45℃~+420℃ |
|
Part Name |
Shell (body, cover) |
HT250 |
ZG230-450 |
ZG 1Cr 13Ni |
Impeller |
HT200 |
ZG230-450 |
ZG 1Cr 13Ni |
|
axis |
45 |
35Cr Mo |
3 Cr 13 |
|
Shell Sealing Ring |
HT250 |
HT250 |
ZG 1Cr 13MoS |
|
Impeller Sealing Ring |
QT500-7 |
QT500-7 |
3 Cr 13 |
|
Shell bolt |
Q235-A |
35Cr Mo |
35Cr Mo |
|
Packing sleeve |
3 Cr 13 |
1Cr 13Heap tungsten carbide |
1Cr 13 Heap tungsten carbide |
|
Mechanical Seal Shaft Sleeve |
3 Cr 13 |
3 Cr 13 |
3 Cr 13 |