Vogelsang VX Series, Manual

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Rotary lobe pump
Operating instructions
VX100Q, VX136Q..QD..QDM2, VX186Q..QD..QDM2, VX230Q..QD
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8.7.3.1 Tightening torques of the hex socket head screw or strain screw for mounting the pressure
disk
VVA
VVA = All steel and cast parts of the machine coming in contact with the medium are made of stainless steel.
Series Hexagon socket head
cap screw
Tightening torque
VX100Q M10, 10.9 45 Nm
VX100QVVA M10, A4 42 Nm
Anti-fatigue bolt
VX136/VX186
M16, 10.9
steel
Tighten anti-fatigue bolt with 200 Nm, then undo before
tightening with 140 Nm.
M16, A4
Stainless steel
Tighten anti-fatigue bolt with 160 Nm, then undo before
tightening with 140 Nm.
VX230
M20, 8.8
steel
300 Nm
Stainless steel bolts/nuts
Before installing stainless steel bolts and nuts:
Clean the threads and contact surfaces. Apply Anti-Seize Paste (Part-No. BKL.014/BAS.001) evenly and in
sufficient quantity to the screw head/nut contact surface and the thread using a brush or putty knife etc. to
avoid seizing of stainless steel.
8.8 Change of wear plates
Wear plate installation position
•
The wear plates of the VX100, VX136 and VX186 series have a defined curvature. To prevent
premature wear by the rotary lobes, the correct installation position of the wear plate must be
observed during installation

Fig.
“Installation position of the curved wear plates".
•
The wear plates of the VX230 series have no curvature and can be orientated in any direction.
Tightening torques
•
Wear plate screws of VX100 series: 20 Nm
•
Wear plate screws of the VX136, VX186 and VX230 series: 40 Nm
(1) Wear plate on the gearbox (2) Wear plate on the cover
(3) Hexagon head screw with microencapsulation
Fig. 31 : Installation position of the curved wear plates