Maintenance
XHD Installation, Operation, and Maintenance Manual
74
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.
• Failure to disconnect and lock out driver power may result in serious physical injury. Never
attempt to replace the packing until the driver is properly locked out.
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
Precautions
WARNING:
•
Packed stuffing boxes are not allowed in an ATEX-classified environment.
•
Dynamic seals are not allowed in an ATEX-classified environment.
Dynamic seal parts
Dynamic seal parts normally do not wear enough to affect operation unless the service is
particularly abrasive. The dynamic seal consists of two parts:
• The expeller seal prevents leakage during operation.
• The secondary seal prevents or minimizes leakage during shutdown of the unit.
• Graphite packing, provides adequate life when it runs dry but can provide longer
performance if it is lubricated with clean water (Flush) or grease via a spring loaded
grease cup.
Содержание Goulds Pumps XHD
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Страница 27: ...Installation XHD Installation Operation and Maintenance Manual 25 Direct coupled baseplate leveling worksheet ...
Страница 147: ...Parts Listings and Cross Sectionals XHD Installation Operation and Maintenance Manual 145 Figure 130 Optional features ...
Страница 151: ...Parts Listings and Cross Sectionals XHD Installation Operation and Maintenance Manual 149 ...
Страница 153: ...Certification CE or CE ATEX XHD Installation Operation and Maintenance Manual 151 ...
Страница 154: ...Certification CE or CE ATEX XHD Installation Operation and Maintenance Manual 152 ATEX notification ...
Страница 155: ...Certification CE or CE ATEX XHD Installation Operation and Maintenance Manual 153 IECEx Certificate of Conformity ...
Страница 156: ...Certification CE or CE ATEX XHD Installation Operation and Maintenance Manual 154 ...
Страница 157: ...Certification CE or CE ATEX XHD Installation Operation and Maintenance Manual 155 Chinese Certificate of Conformity ...