temperatures in the range of 32°F to 190°F (0°C to 88°C), average leakage rates of 60 to
80 drops per minute are recommended. However, each individual pump and installation
has unique operating conditions that result in widely-variable leakage rate requirements.
Maximum fluid temperature
At fluid operating temperatures near the upper limit of 190°F (88°C), the maximum
temperature rise of the leakage is important. Never operate a packed pump with steam
forming at the gland. This limits the temperature rise to a maximum of about 20°F (-7°C). If
the formation of steam persists at higher leakage rates, you must provide cooling water by
means of an external supply, or a heat exchanger used to cool the bypass flush.
Vibration
After startup, vibration can be measured at the coupling end of the pump bearing frame
and on the coupling end bell of the motor in the horizontal (H), vertical (V), and axial (A)
directions. The maximum expected value is 0.15 in/sec (3.8 mm/sec) RMS (ANSI/HI 9.6.4)
when operating in the Preferred Operating Range (POR) flows from 70% to 120% of the
best efficiency point (BEP) (ANSI/HI 9.6.3). Operation outside the POR, but within the
Allowable Operating Range (AOR) from minimum flow to 85% of the end of the curve
increases the vibration value by 30%. If the vibration recorded exceeds these values, shut
down the pump, diagnose and fix the problem, re-start, and re-check the vibration.
5 Commissioning, Startup, Operation, and Shutdown
Series e-1510 INSTRUCTION MANUAL
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Summary of Contents for Bell & Gossett e-1510 Series
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