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EVMS/EVMSL
2. Operation
(1) Close the discharge valve when priming is complete. Completely open the suction valve for
flooding or positive suction.
(2) Turn the switch OFF and ON several times, and check that there are no problems with
rotation direction or operating conditions.
Note
(3) When the specified speed is reached, gradually open the discharge valve, and begin
continuous operation.
(4) Check that there are no problems with pressure, current, vibrations, noise, etc. (In addition,
refer to
. Maintenance.) Keep pressure gauges, compound pressure gauges and other
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valves closed except during measurement. Damage can easily result if they are left open.
(5) For the 2nd and subsequent operations of the pump, refer to
are no problems start operation immediately.
Note
3. Stopping
(1) When stopping operation, gradually close the discharge valve and then stop the motor.
(2) If there is no check valve at the discharge side,
the suction side. Therefore,
4. Operation cautions
(1) If the pump is operated for long periods with the discharge valve closed, the water
temperature inside the pump will rise, causing an accident. Do not operate the pump with the
discharge valve closed for longer than 1 minutes.
(2) Starting and stopping the pump repeatedly at short intervals will harm it and shorten its
service life.
Note
The correct rotational direction is clockwise looking from the motor.
Operate at a capacity appropriate to the equipment. (Under- or
over-operation may result in noise and vibrations. Further, unnecessary
power consumption will result.)
Avoid operation in the state of cavitation occur. Over capacity-operation
may result in cavitation. Cavitation is considered when vibration or noise
occurs or specified capacity (pressure) can't be achieved. Turn down
discharge valve to reduce capacity.
completely
Motor output
7.5kW or less
11kW～22kW
30kW or more
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reverse flow occurs from the discharge side to
close the discharge valve.
Start frequency
Less than 6 times an hour
Less than 4 times an hour
Less than 3 times an hour
. Maintenance, and if there
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