Rotary lobe pump
Operating instructions
VX100Q, VX136Q..QD..QDM2, VX186Q..QD..QDM2, VX230Q..QD
60/68
11.2 Help
Possible cause
Possible measure
Observe notes and
safety notes
Chapter
A
Pump is not priming
Fill the pump with fluid.
B
Incorrect direction of rotation
Change the pump's direction of rotation.
"Flow direction"
C
Pipe causing pump housing
warping
Check the orientation of the pipe to the pump.
If necessary provide a compensator or fix the pipe.
"Installation in pipe lines"
D
Leakage in the suction pipe
Check the suction-side pipe system for leakage.
Gas formation
Vent the suction pipe and pump chamber, fill with
fluid.
E
Suction pipe clogged
Check the free flow of the pipe system on the
suction side.
F
Foreign matter in medium
Clean pump unit. Install strainer in the suction pipe.
G
NPSH
a
too low (medium
evaporates during feeding)
Increase the suction pipe diameter, shorten the
suction pipe length, simplify suction pipe assembly,
reduce the suction height, reduce the speed, adjust
the medium temperature.
"Installation in pipe lines"
H
Belt tension too low
Tighten in accordance with manufacturer's
specifications.
"Installation of pump and
motor on base"
I
Coupling not correctly
aligned
Check the orientation and align according to
manufacturer's specifications if necessary.
J
Belt drive slips
Tighten in accordance with manufacturer's
specifications.
K
Faulty electrical connector
Check electrical equipment.
"Connection to the power
supply"
Error in the hydraulic system
Check the hydraulics.
L
Motor speed too low during
variable frequency drive
operation
Install external fan, increase motor speed.
"Variable frequency drive
operation"
M
Stiff running caused by
swollen lobe elastomer
Check the medium resistance of the lobe
elastomer.
"Material description for
rotary lobes"
Stiff running caused by
accumulation of solid matter
in the gaps
Clean pump chamber, increase the gaps
Chapter
"Reduction of the starting torque", adjust
the drive.
"Repair", "Connection to
the power supply"
N
Oil level in the gearbox is not
okay
Chapter
"Gearbox"
"Maintenance"
O
Operation-related
fluctuations in buffer
chamber
Chapter
"Buffer chamber"
"Maintenance"
P
Mechanical seal damage
Change the mechanical seal,
Chapter
"Cartridge mechanical seal change"
"Repair"
Faulty repair of the
mechanical seal
Buffer fluid tank leaking
Check buffer fluid tank for leaks.
"Maintenance"
Q
Seal leaking
Chapter
"Dry buffer chamber"
"Maintenance"
R
Operating pressure too high
Reduce the operating pressure.
"Specifications"
S
Medium viscosity above the
nominal value
Reduce speed. Increase medium temperature.
"Designated use"
T
Medium viscosity below the
nominal value
Increase speed, decrease medium temperature,
replace wear parts.
"Repair"
Gap too large
Reduce gaps
Chapter
“Reduction of the
starting torque" in reversed procedure
"Maintenance"
U
Medium temperature above
the nominal value
Reduce medium temperature.
"Designated use",
"Material description for
rotary lobes"
V
Medium temperature below
the nominal value
Increase medium temperature (after consulting
Vogelsang)
Содержание VX Series
Страница 1: ...Best Practices for Installation of VX Rotary Lobe Pumps WELCOME TO VOGELSANG FACTORY TRAINING ...
Страница 6: ...Follow all best practices for safety when working on Vogelsang Equipment Preparing for Installation ...
Страница 15: ...Installation ...
Страница 24: ...Pressurizing the Pump ...
Страница 36: ...Direction of flow Startup Checklist Startup ...
Страница 44: ......
Страница 121: ...Service Manual Service Manual Pump Models VX Series Q Pumps ...
Страница 122: ...Service Manual Service Manual Pump Models VX Series Q Pumps ...
Страница 123: ...Service Manual Service Manual Pump Models VX Series Q Pumps ...
Страница 133: ...Service Manual Service Manual Pump Models VX Series Q Pumps Operational Startup Testing continued ...
Страница 189: ...Service Manual Service Manual Pump Models VX Series Q Pumps Warranties 4 A 1 Warranty Information ...
Страница 191: ...Service Manual Service Manual Pump Models VX Series Q Pumps 5 A 1 Documents for Testing at Initial Startup continued ...
Страница 192: ...Service Manual Service Manual Pump Models VX Series Q Pumps 5 A 1 Documents for Testing at Initial Startup continued ...