Rotor Case Assembly - VERDER PACKO ZL Series Operation & Maintenance Manual

Hygienic rotary lobe pumps
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6.4 ROTOR CASE ASSEMBLY

Before installing the rotor case (31) to the gearbox (1A), make sure to clean the surface of the
rotor case and the Gearbox and make sure to put the shims between rotor case and Gearbox as
originally.
Assemble the rotor case (31) onto the Gearbox (1A) and secure
the four hexa-nuts (46) with reference of below torque set
value.
Series
ZL100
Nut size
M8
Torque (Nm)
30
Assemble rotors onto the shaft, engaging the shallow groove
with short spline in rotor and seal side first in to the shaft.
Place the plastic bar between the rotors as shown in Figure 24.
Tighten the first rotor bolt with a special delivered tool to the
below recommended torque.
Series
ZL100
Bolt size
M8
Torque (Nm)
17
To tighten the second rotor, place the plastic bar on the opposite
side of the rotor and tighten the second rotor bolt to the proper
torque.
Be sure not to make any bur on the rotor bolt groove during this process. It may cause a serious
problem such as galling on the rotor case and if it happened, it must be removed.
Install the new O-ring inside of the cover (32) and slide the
cover over the studs. Screw the cap nuts (33) on the studs and
tighten using an appropriate wrench with reference of below
torque set value in an opposing manner shown in Figure 25.
Series
ZL100
Nut size
M8
Torque (Nm)
14
ZL400
ZL200
ZL300
M20
M10
M14
34
80
120
ZL400
ZL200
ZL300
M18
M14
M18
35
48
56
ZL400
ZL200
ZL300
M20
M10
M14
17
30
52
ZL500
M20
120
ZL500
M18
56
ZL500
M20
52
Fig. 22
Fig. 23
Fig. 24
Fig. 25
22

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