Goulds Pumps 3196 i-FRAME - IOM - Manual (Page 56)

Commissioning, Startup, Operation, and Shutdown
Part Function
Secondary seal (graphite This secondary seal prevents leaks during pump shutdown and is
packing) comprised of the following:
• Graphite packing – Graphite packing provides adequate life running
dry but can provide longer performance 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 repeller 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 pumped fluid out of the packing.
There must be enough flow to cool the packing.
• If you lubricate with grease, then you must use spring-loaded
grease lubricators to maintain a constant supply.
• Elastomeric face seal – The elastomeric face seal consists of an
elastomer rotary fitted to the shaft and a ceramic stationary seat fitted
in the gland. To set an elastomeric face seal, refer to Set an
elastomeric face seal. This seal is designed to run dry, so no flush is
necessary.
Set an elastomeric face seal
This procedure ensures that the elastomeric seal attains proper contact. No other adjustments
are necessary.
1. Remove the gland nuts.
2. Slide the gland back on the sleeve.
3. Pull the rotary back on the sleeve until the rotary is about 1 in. (25 mm) beyond the stuffing
box face.
4. Push the gland back onto the studs, pushing the rotary back along the sleeve.
5. Tighten the gland nuts.
Pump priming
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.
1. Discharge isolation valve
2. Check valve
3. Suction isolation valve
Prime the pump with the suction supply below the pump
Use a foot valve and an outside source of liquid in order to prime the pump. The liquid can
come from one of these sources:
• A priming pump
• A pressurized discharge line
• Another outside supply
54 Model 3196 i-FRAME Installation, Operation, and Maintenance Manual