Some issues with the backup pump
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The transfer pumps in our factory operate on a one-in-use and one-backup basis, but there are some things I don’t understand, so I’d like to ask those with more experience for advice. 1: What does it mean by a backup pump? Is the main pump used regularly, and only the backup pump is used when the main one fails? 2: Is it necessary to switch between the main pump and the backup pump on a scheduled basis? For example, use the main pump in January, the backup pump in February, and then switch back to the main pump in March? What should be taken into consideration when making such switches? 3: Is it okay that only the main pump is equipped with an inverter, while the backup pump doesn’t have one? 4: Pressure gauges are not installed at the outlets of the two pumps; instead, they are placed on the pipe where the outlets meet. Is this approach acceptable?
My understanding: 1. The backup pump is designed to prevent disruptions in the normal operation of the process in case the main pump fails. A backup pump doesn’t have to be used only when it’s broken ； 2 During normal operation, the main pump and the backup pump take turns running, with the pumps typically being switched every month ； When shutting down the pump, it usually requires three people to operate simultaneously: two people are positioned at the outlet valves of the main pump and the backup pump, while the third person is at the pump’s switch. During the operation, the backup pump is turned on first, and then the main pump is shut down 4 This should work, but the pressure displayed should be lower than the actual pressure at the pump outlet; it’s best to have one such device at each pump outlet! The third question isn’t very clear!
3. Yes, it is possible if your requirement for pressure or flow adjustment is not very high, or if there is backflow. The main pump is used in normal operation, while the backup pump is employed during maintenance or periodic operations, provided that the medium being transported does not condense or form scale. Generally, each pump is equipped with its own pressure gauge to facilitate fault diagnosis. It’s not necessary to use the backup pump only when there is a malfunction. Last edited by Pseudo Xiao Bao on 2009-2-20 20:12.]
In continuous processing, a backup pump is needed so that it can be used at any time without disrupting production. Therefore, pumps that are used and those that are commonly used should be separated. As soon as the regular pump is repaired, switch to it immediately. Keep the standby pump in good working condition for a long time.
There is also a problem in this case when the backup pump is not used for a long time. Problems may occur. It may not start properly at critical moments.
1. The standby pump is provided to ensure the continuous operation of the factory. Pumps that serve as backups to each other should be operated in reverse on a regular basis for scheduled maintenance. 2. When reversing the pump, pay main attention to the pressure at the pump outlet. Installing pressure gauges on common pipelines is not allowed according to the operating procedures. 3. One pump uses variable frequency drive while the other uses mains frequency, saving on investment.
1. A backup pump is installed to ensure continuous production, preventing shutdowns due to pump failures. It is not only used when a pump breaks down; it should be switched in regularly. 2. During normal operation, the main pump and the backup pump should be switched regularly; each organization has its own regulations regarding the interval between such switches, with smaller pumps generally requiring a switch every month ； The pump of high-voltage motors should be replaced at most every three months ； 3. The main pump and the backup pump – only the main pump is equipped with an inverter, while the backup pump does not have one. This arrangement is made to save energy by using the main pump as much as possible. Nevertheless, the backup pump also needs to be checked regularly to ensure it is in good condition. In the event that the main pump fails, the backup pump can take over to maintain normal production and prevent shutdowns. Once the main pump is repaired, operation can be switched back to the main pump. 4. This should work, but the pressure displayed should be lower than the actual pressure at the pump outlet. It is advisable to have one such device at each pump outlet, as this makes it easier to determine the operating condition of the pumps in case of faults, and it is simple to check whether the flow rate from the pumps is normal.