WDM PI Operation Manual page 20

PI Operation Manual
To monitor flow, pressure, and temperature, regular visual inspection and monitoring is advisable
and/or necessary during operation.
WDM Pumps recommends checking the pump constantly at regular intervals in order to detect
problems early, in case they arise.
The operational check routine must include minimum the following points:
Beware of freely rotating parts, when the pump is in operation there is a high risk of injury.
• Check at regular intervals that the safety equipment is sound and is arranged and fastened
according to the regulations, and energized where applicable.
• Check the security of all bolting, piping, and wiring.
• Check all gauges, valves and instruments for proper working order.
• Check all equipment for correct rotation.
• Check that the pumping unit is running quietly and without vibrating.
Unusual or too loud noises point towards a possible fault.
• Monitor the power consumption of the drive motor. Low or excessive power consumption
indicates a possible fault.
• Check the sealing system:
a. Refer to the seal manufacturer for his estimate of maximum acceptable leakage rate, as this will
depend on application, design, location and the sealed liquid characteristics.
b. If leakage is excessive, switch the pump off as quickly as possible, isolate the pump by closing
the discharge and suction valves or using some other approved method designated as safe for
your system, and check the rotating seal ring and the stationary seal ring.
If the sealing system of the mechanical seal fails, the pump must be taken out
of operation immediately.
The pump may only be operated under the minimum operating range for short periods. The
minimum pump flow is given in the characteristic line.
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