Maintenance
TT Twin-Screw Pump -
Installation, Operation, and Maintenance Manual
57
1. Disassemble the pump in accordance with the disassembly section of this manual.
2. Inspect it in accordance with the inspection section of this manual
3. Repair or replace any worn or damaged parts.
Bearing maintenance
These bearing lubrication sections list different temperatures of the pumped fluid. If the
pump is ATEX-certified and the temperature of the pumped fluid exceeds the permitted
temperature values, then consult your Circor representative.
Bearing lubrication schedule
Type of lubrication
First lubrication
Lubrication intervals
Oil
Add oil before you install and start the
pump. Change the oil after 50 operating
hours for new bearings.
After the first 50 operating hours,
change the oil every 4000
operating hours.
Grease
Pump will be shipped with grease.
Change the grease every 2000
operating hours.
Mechanical-seal maintenance
WARNING:
The mechanical seal used in an EX- classified environment must be properly certified.
for the conditions of service.
CAUTION:
Running a mechanical seal dry even momentarily can cause seal failure and physical
injury. Never operate the pump without a reliable supply of liquid to the mechanical seal.
Mechanical seal maintenance
In addition to the routine inspections for leakage, the mechanical seal area should be kept
free from the buildup of any crystallization of leakage, dust or debris. Maintaining a clean
environment around the mechanical seal will be beneficial in allowing detection of increased
leakage or another abnormal condition.
