Scratches In The Pump Housing - PROCESSTEC ViscoTwin 130 G8 Operation & Maintenance Manual

3.12 Scratches in the Pump Housing

If the spindles or the pump housing show scratches, this indicates that the spindles touch each other or
touch the pump housing. The following should be investigated first:
A) Pump configuration with PIN position:
ViscoTwin
Each Pump Housing is configured based on flow direction and kind of pumped product. The
standard configuration is FHO3V:
F: Face In
H: Housing Out
O: Spindles turning outwards
3: Pin Position 3
V: Spindle Arrangement "V"
For more information, please see Section 5.5 "Pump Housing Configuration" on page 94.
B) The spindles are not correctly gapped. The clearances between the spindles show that the flights on
one side touch each other. Please consult Subsection 4.5.8 "Proper Gapping of Pump" on page 68.
C) The spindles touch the housing at the pump face end when A) and B) are verified and correct. The
clearance between spindle tip and housing is too small for the viscosity of the pumped product and the
associated rpm. This issue can be addressed with tapered spindles.
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3. OPERATION
Page 39