Disassembly, Inspection & Reassembly
62
236 Series
Twin-Screw Pump -
Installation, Operation, and Maintenance Manual
•
Irregularities such as heavy scratches, corrosion, denting etc. in the casing-gasket
sealing surface. If the irregularity spans the sealing surface and is deeper than 15% of
the gasket thickness, sealing integrity is likely to be impaired.
•
Screw shaft to body clearances that exceed the values in the Minimum running
clearances table by more than 50%.
NOTICE:
When clearances between the screw shaft and body become excessive (increase by 50%),
hydraulic performance decreases substantially. High rated pressure differentials will tend to
magnify any loss of hydraulic performance.
Body and seal housings areas to inspect
The arrows point to the areas to inspect for wear on the body (350), liner (352), seal cover
(470), cover D (407) and cover DF (401):
