April 30, 2011 (One Question per Day)

When abnormal noises, overheating, significant changes in flow rate, or severe vibration occur, it is necessary to switch the system or shut it down for maintenance.

There are many: 1. There are regular pump cutouts. 2. Electrical maintenance (such as motor overheating, motor bearing overheating, motor lubrication, abnormal noises in the motor, etc.) 3. Mechanical failures (such as leaks, misalignment of the two shafts, pump overheating, clogged inlet filters, clogged coolers, internal leaks) 4. Instrument failures (instrument malfunctions, replacement, maintenance) 5. Requirements related to process operations (cavitation, etc.) 6. Accidents

There is a regular pump cutting-off mechanism； Process operations require ； Accidents, as well as various incidents that require shutdowns when necessary

During the operation of the pump, emergency switching or emergency shutdown should be carried out if either of the following situations occurs. ·The motor current is too high; either a phase is damaged or the motor is on fire. ·The bearing temperature rises suddenly, smoking occurs, and there is a risk of the shaft being seized. ·When there are sounds of cracking and breaking between the shafts. ·When there is a severe cracking sound inside the pump. ·In the event of a personal safety accident. ·When process requirements call for an emergency switch or emergency shutdown. The principle for emergency switching is to stop first and then start, and the steps are as follows ； ·Immediately press the “Stop” button to halt the operation of the faulty pump. ·Activate the backup pump immediately according to normal driving procedures. ·Close the outlet valve of the pump involved in the incident; if maintenance is required, have an electrician cut off the power supply and place a warning sign. ·Contact a maintenance technician to repair the decommissioned pump and get it in good standby condition.

Under what circumstances do pump units need to be switched or stopped? 1. Generally, the pump is reversed once a month ； 2. In case of an accident, such as power outages or water interruptions ； 3. In case of leakage or problems with the motor. In many cases!

Reply to 1# adsl121: Regarding the emergency pump switch mentioned by the original poster, the pump may experience issues such as abnormal vibration, abnormal noise, lubricant leakage, bearing overheating, vacuum conditions, fires, and severe leakage

There are many: 1. There are regular pump cutouts. 2. Electrical maintenance 3. Mechanical failures 4. Instrumentation faults 5. Process operation requirements 6. Accidents 7. Other reasons requiring pump shutdown, etc

Active: Normal drive pump, with regular maintenance or shutdown. Passive: Abnormal noises, vibrations, leaks, fluctuations

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