Type ZW
Qmax=23m3/h – Hmax=298m
APPLICATION
ZW pumps are designed to handle clear water or industrial water. In mining ZW pumps are most often used as sprinkling pumps, located on the equipment combine. In addition ZW pumps are used wherever the pumping industrial water with pressure up to 30 bar and limited capacity is required.
ZW pumps can be used in potentially explosive atmospheres as a device group I category M2.
DESIGN
Horizontal, stationary multistage pumps with bodies divided radially, mounted using tiebolts. Pumps possess closed impellers and centrifugal vane guide with side outlet. Discharge casing is directed vertically upwards and suction casing to the side. The axial forces, reduced by the pressure relief holes in impellers is transmitted through the roller bearings. The pump shaft is mounted in rolling bearings lubricated with grease without the need to cooling. Shaft seals in the basic version are gland packing. ZW pumps running at a speed 3000 rev/min.
MATERIALS OF CONSTRUCTION
ZW pumps are manufactured in five versions with a different number of stages depending on the required performance.
No. |
Part name |
No. |
Part name |
No. |
Part name |
1 | Shaft | 13 | Seal ring | 25 | Shaft nut |
2 | Bearing cap | 14 | Guide | 26 | Sleeve bearing |
3 | Seal ring | 15 | Sealing sleeve | 27 | Rolling bearing |
4 | Deflector | 16 | Discharge casing | 28 | Distance sleeve |
5 | Bearing housing I | 17 | Lantern ring | 29 | Gland |
6 | Seal | 18 | Shaft sleeve | 30 | Shaft protecting sleeve |
7 | Tie bolt | 19 | Gland | 31 | Suction casing wall |
8 | Sleeve | 20 | Stuffing box guard | 32 | Distance sleeve |
9 | Suction casing | 21 | Bearing housing II | 33 | Seal ring |
10 | Stage casing | 22 | Deflector | 34 | Rolling bearing |
11 | Impeller | 23 | Bearing sleeve | 35 | Bearing cap |
12 | Seal ring | 24 | Sealing ring | 36 | Shaft nut |
Dimension [mm] |
Pump type |
ZW-50A |
|
L | Number of stages |
6 | 950 |
7 | 1005 | ||
8 | 1057 | ||
9 | 1115 | ||
10 | 1170 | ||
a | Number of stages |
6 | 374 |
7 | 429 | ||
8 | 484 | ||
9 | 539 | ||
10 | 594 |
Pump type |
Number of stages |
Capacity |
Head |
Rotation speed |
Shaft power |
Weight |
ZW-50A | 6 | 23 | 179 | 2950 | 23,1 | 145 |
7 | 209 | 27 | 157 | |||
8 | 238 | 30,8 | 170 | |||
9 | 268 | 34,7 | 182 | |||
10 | 298 | 38,5 | 195 |
The parameters are specified for clean water of density ρ=1000 kg/m3 and temperature T=15°C.