PB3 User Instruction
Page 30 of 39
d)
Never operate the pump without proper lubrication.
4.7.1 Operating checks
Caution
In the interest of operator safety, the unit must not be operated above or below the
nameplate conditions. Such operation could result in unit failure causing injury to
operating personnel.
Caution
Operation at low flows results in pump power heating the liquid. A bypass may be
required to prevent vaporization and subsequent pump damage. Mechanical damage
may result from continuous operation at flows less than the minimum flow specified
in the Data Sheet.
Immediately after start-up, and frequently during running, check the following:
a)
Check suction and discharge pressure gauges.
b)
Check pressure gauges on each side of suction strainer.
c)
Check for excessive leakage.
d)
Check for unusual noises.
e)
Check lubrication system.
f)
Check for adequate flow of cooling liquids.
g)
After unit has been operated a sufficient length of time to reach normal operating temperature and
condition, the unit is to be shut down and a “HOT” coupling alignment check must be made. (Refer to
shaft /coupling alignment procedure).
WARNING
Operation of the unit without appropriate lubrication can result in overheating of the
bearings, bearing failures, pump seizures and actual breakdown of the equipment,
exposing operating personnel to injury.
4.8 Stopping and shutdown
If motor driven, de-energize driver circuit. If turbine driven, stop turbine-driven pumps by manually tripping the
over speed trip.
NOTE
If pump stops abruptly when driver is shut down, investigate for pump binding.
Take necessary remedial action before restarting pump.
Caution
If pump is subjected to freezing temperatures, the pump must be drained of liquid to
prevent damage to pump.
a)
Close the pump suction and discharge valve.
b)
Close valve in bypass line.
