Service Manual
Service Manual
Pump Models:
VX Series Q Pumps
No Discharge
Below Capacity
Irregular Discharge
Lost Prime
Pump Stalls at Startup
Pump Overheats
Motor Overheats
Excessive Power Draw
Noise & Vibration
Pump Element Water
Seizure
Causes
Solution
X
X X X
Liquid temp. above rated
figure.
Cool the liquid prior to
pumping
X
X
X
Liquid temp. below rated
figure.
Heat the liquid prior to
pumping
X X X
Unexpected solids in
product.
Clean the system. Add
strainer to supply line.
X
X
X
X
X
X
X
X X X
Delivery pressure above
rated figure.
Check for obstruction.
Simplify supply line.
Seal flushing inadequate
Check that fluid flows
freely into seal. Increase
flow rate.
X
X
X
X
Pump speed above
rated figure.
Decrease pump speed.
Pump speed below rated
figure.
Increase pump speed.
X
X
X
X
X
X
X
Rotor case strained by
pipe work.
Align pipes. Add flexible
pipes or expansion
fittings.
X
X
X
X
Belt Drive Slipping
Tighten belt to specified
tension.
X
Flexible coupling
misaligned.
Adjust flange alignment.
X
X
X
X
X
X
Insecure pump drive
mountings
Add lock washers and
retighten.
X
X
X
X
X
X
X
Shaft bearing wear or
failure.
Call Vogelsang or
distributor for advice.
X
X
X
X
X
Worn unsynchronized
timing gears
Call Vogelsang or
distributor for advice.
X
X
X
X
X
X
X
Gear case oil level
incorrect.
Refer to oil level
instructions.
Summary of Contents for VX Series
Page 1: ...Best Practices for Installation of VX Rotary Lobe Pumps WELCOME TO VOGELSANG FACTORY TRAINING ...
Page 15: ...Installation ...
Page 24: ...Pressurizing the Pump ...
Page 36: ...Direction of flow Startup Checklist Startup ...
Page 44: ......
Page 121: ...Service Manual Service Manual Pump Models VX Series Q Pumps ...
Page 122: ...Service Manual Service Manual Pump Models VX Series Q Pumps ...
Page 123: ...Service Manual Service Manual Pump Models VX Series Q Pumps ...