BTS BTKF-K Serie Manual Del Usuario página 55

4) Pump discharges no liquid.
5) Flow rate continuously decreases.
6) Motor operates overloaded
7) Pump operates with very much noise.
8) Pump does not discharge sufficient liquid.
Stopping the Pump
- Slowly close the discharge pump.
-. If there is liquid impulse prevention equipment in Discharge line and if the impulse
which may occur is not in dangerous levels, you can stop the pump without closing
the valve.
- Stop the motor. Watch that pump group has stopped calm and regular way.
- If there is external feed to seal, close this for decreasing the pressure in seal.
- If pump will be out of service for a long time close suction valve and auxiliary
circuits if any.
- If there is frost danger and /or it will not be used for a long time, completely
discharge liquid inside pump by means of discharging plug over pump body. Take
necessary precautions against freezing risk.
Controls to be Made While Pump is Running
- Since pumps have mechanical seal it does not need any maintenance. A few
amount of liquid may leak from mechanical seal but it is so small that it can not be
noticed. If the amount of liquid coming from mechanical seal this means that seal
surface is abraded and needs to be replaced. Lifetime of mechanical seal is mainly
depends on cleanness of discharged liquid.
- Motor current should sometimes be controlled from ammeter over electrical panel
which controls the motor. If current values are more than motor nameplate values
there may be friction or squeezing in pump. Pump should immediately be stopped
and mechanical and electrical controls should be done.
- If there are spare pumps in system, this type of pumps should be run for a short
while at least once a week and controlled whether read for operation. Control with
auxiliary elements if any.
- Pump should absolutely be run in closed valve condition (zero flow rate) for a long
time.
- Pump should operate silent and without operation.
- Bearing temperatures should never exceed ambient temperature (more than 50ºC
). It should never exceed 80ºC
- Never operate pump without liquid.
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