Desmi NSL 100-215, Инструкция по эксплуатации и обслуживанию

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COMMISSIONING, START-UP AND SHUTDOWN
DESMI Pumping Technology A/S
Tagholm 1
9400 Nørresundby
– Denmark
Tlf. nr.: +45 96 32 81 11
Fax +45 98 17 54 99
57
E-mail: desmi@desmi.com www.desmi.com
6.7. Frequency of starts
. DANGER
EXPLOSION HAZARD!
DAMAGE TO THE MOTOR!
Too high temperature of the motor surface may cause explosion, which will cause
damage to the motor, death or serious injury.
For explosion-
proof motors, observe the frequency of starts in manufacturer’s
documents.
The frequency of starts is usually determined by the maximum temperature increase of the motor.
This largely depends on the power reserves of the motor in steady state operation and on the
starting conditions (DOL, star-delta, moments of inertia, etc.). If the start-ups are evenly spaced
over the period indicated, the following limits serve as orientation for start-up with the discharge-
side gate valve slightly open:
Impeller material
Maximum number of start-ups
[Start-ups/hour]
Bronze (NiAlBz/CC333G) 6
Stainless steel (1.4410/1.4436) 6
CAUTION
RISK OF PROPERTY DAMAGE!
Re-starting while motor is still running could damage the pump (set).
Do not re-start the pump set before the pump motor is fully stopped.
6.8. Fluid handled
6.8.1. Flow rate
Recommend operate pump at 70 to 120% of BEP flow for hihg efficiency, operation outside the
range reduce the pump life (incl. shaft seal and pump bearings) significantly.