ITW Dynatec DYNAMELT D15 Series Technical Documentation Manual page 225

ITW Dynatec
Appendix Pumps
Pump shaft Leakage
If shaft seal leakage is present the seal should be replaced.
If the pump uses Packing seals:
WARNING
• Slight leakage is necessary to lubricate the packing.
• If not appropriately collected, packing leakage may make floor slippery and/or
expose personnel to hazardous fluids. Collect packing leakage properly and safely.
• Tighten the packing follower screws in a crossing pattern, gradually, until the
packing is evenly compressed and the leakage diminishes to near zero, then loosen
each of the screws, gradually, ¼ turn at a time, until slight leakage occurs. Slight
leakage is necessary in order to lubricate the packing and the shaft.
• Be certain to adjust the packing follower properly.
• Do not over-tighten the packing follower. Over-tightening will cause damage to the
packing and the shaft.
• Other sealing options are available.
• Re-adjust the packing follower several times through the running-in period, until the
seal is thoroughly seated and the rate of leakage is stable.
Cleaning
Before removal from machine, the pump should be rotated for a short period (with inlet
supply shut off) to discharge process fluid. Care should be taken, when removing and
stripping the pump, to allow for any residual fluid. Pump components can be solvent or
ultrasonically cleaned by immersion, using a compartmentalized wire basket. Dry in air.
Stubborn residues may be removed with a brass wire brush. Avoid burnishing the sharp
edges of gear and gear races.
Fluid immersion in rust inhibitor is advised. If components are to be stored for some time,
they should be lightly coated with oil.
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