GRISWOLD PUMP COMPANY Pump Operation Page 17
Installation, Operation and Maintenance Manual
Griswold Model 811
Griswold Pump Company Pump Operation Page 19
Never mix greases of different consistencies or different types.
.
A pump must never be allowed to run dry or without liquid in the seal chamber. Operating
a pump without liquid in the casing or seal chamber, even briefly, can result in damage to
the mechanical seal, damage to the pump or personal injury.
A centrifugal pump must be primed before operation. If run dry, damage can occur to
close- clearance parts and the mechanical seal will be destroyed. If not primed, the pump
If re-greasable bearings are supplied, grease fittings are furnished on the bearing frame. Prior to
initial start-up, clean any dirt or foreign matter from the grease fittings. Remove grease plugs
from the bottom of the frame. Pump grease through the fittings into each bearing cavity until
fresh grease comes out of the relief ports. Re-grease bearings every 2000 hours of operation or
every three (3) months, whichever occurs first.
After the above steps have been completed, install the coupling spacer and install the coupling
guard as stated in Appendix IX.
Stuffing Box (Shaft Seal)
For pumps with mechanical seals, the seal has been installed at the factory. No further
adjustments are necessary. If cartridge seals are used, ensure that the positioning clips have
either been removed or re-positioned for operation.
If pump is furnished with packing, check to see that the gland nuts are finger-tight only. Packing
must be run in gradually after initial start-up. For proper operation, packing must leak at least
approximately 40-60 drops per minute in order to lubricate and cool the packing and shaft sleeve.
Once the pump has been placed in operation, the gland nuts should be tightened ¼ turn at a time
until the required leakage rate is attained. This may take several hours.
Priming
Systems with Positive Suction Head (Flooded Suction)
Slowly open the suction isolation valve. Open air vents in suction and discharge piping until
liquid flows out. Close all vents.
WARNING
CAUTION
CAUTION
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