ITT GOULDS PUMPS 3180, Инструкция по установке, эксплуатации и обслуживанию

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Table 12: Secondary seal part function
Secondary seal type Description and operation
Graphite packing Graphite packing provides adequate life running dry but can provide longer perform-
ance if lubricated with clean water or grease.
• If you lubricate with clean water, then the repeller reduces both the quantity and
pressure of seal water that is necessary. If the suction head is less than the re-
peller capability, then the stuffing box pressure is the same as the atmospheric
pressure. Water pressure for the seal must be high enough to overcome static
head when the pump is not operating to keep solids in the pumped fluid out of
the packing. There must be enough flow to cool the packing.
NOTICE:
• WARNING
• The pump must be completely filled with liquid before
starting. The pump must not run dry in the hope it will
prime itself. Serious damage to the pump may result if
it is started dry.
• If you lubricate with grease, then you must use spring-loaded grease lubricators
in order to maintain a constant supply of grease.
Diaphragm seal This is an elastomeric disk that seals against a follower when the pump is not operat-
ing. The position of the follower is set at the factory but should be checked prior to
start-up. The step on the follower should line up with the face of the gland plate. Some
adjustment might be required.
Use the repeller flush connection if you need to flush the repeller. Never use more
than 20 psig (1.4 kg/cm
2
) with the diaphragm option.
NOTICE:
• WARNING
• The pump must be completely filled with liquid before
starting. The pump must not run dry in the hope it will
prime itself. Serious damage to the pump may result if
it is started dry.
5.9 Pump priming
WARNING:
These pumps are not self priming and must be fully primed at all times during operation.
Loss of prime can lead to excessive heat and severe damage to the pump and seal.
5.9.1 Prime the pump with the suction supply above the pump
1. Slowly open the suction isolation valve.
2. Open the air vents on the suction and discharge piping until the pumped fluid flows out.
3. Close the air vents.
5.9 Pump priming
Models 3180, 3181, 3185, and 3186 Installation, Operation, and Maintenance Manual 63