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
Q [m3/h]

Head
H [m]

Rotation speed
n [rpm]

Shaft power
P [kW]

Weight
m [kg]

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.