Goulds Pumps CV 3196 i-FRAME - IOM - Manual (Page 66)

Reference drawing
The manufacturer supplies a reference drawing with the data package. Keep this drawing for future use
when you perform maintenance and seal adjustments. The seal drawing specifies the required flush fluid
and attachment points.
Before you start the pump
Check the seal and all flush piping.
Mechanical seal life
The life of a mechanical seal depends on the cleanliness of the pumped fluid. Due to the diversity of
operating conditions, it is not possible to give definite indications as to the life of a mechanical seal.
Packed stuffing-box maintenance
WARNING:
• Packed stuffing boxes are not allowed in an ATEX-classified environment.
• Never attempt to replace the packing until the driver is properly locked out and the coupling spacer is
removed.
Accepted leakage rate
It is not necessary to shut down or disassemble the pump to inspect the packing operation. During normal
operation, the packing should leak approximately one drop per second.
Adjustment of gland
Adjust the gland if the leakage rate is greater than or less than the specified rate.
Evenly adjust each of the two gland bolts with a one-quarter (1/4) turn until the desired leakage rate is
obtained. Tighten the bolts to decrease the rate. Loosen the bolts to increase the rate.
Tightening of packing
NOTICE: Never over-tighten packing to the point where less than one drop per second is observed.
Over-tightening can cause excessive wear and power consumption during operation.
If you cannot tighten the packing to obtain less than the specified leakage rate, then replace the packing.
Dynamic-seal maintenance
WARNING:
Dynamic seals are not allowed in an ATEX-classified environment.
About the dynamic seal
Dynamic seal parts do not wear substantially to affect operation and do not require maintenance unless the
service is particularly abrasive or corrosive.
Repeller
The dynamic repeller prevents pumpage leaks through the stuffing box when the pump operates under
published acceptable conditions.
Static seal
A static seal prevents leakage when the pump is shut down. A static seal is either of the following:
• a lip seal
• an elastomeric-face seal
• graphite packing
The only maintenance that the lip seal and the elastomeric-face seal require is replacement when leakage
becomes excessive.
The graphite packing should be installed as stuffing-box packing and is designed to run dry.
Maintenance
64 Model CV 3196 i-FRAME Installation, Operation, and Maintenance Manual