What is the lock-up pressure of a pump? What is this pressure mainly used for?
Thread Content
The locking pressure of a centrifugal pump is the maximum designed inlet pressure of the pump plus 120% of the pump head at its rated operating capacity, which is determined based on the maximum impeller size of the pump. Is the locking point pressure of this centrifugal pump something that needs to be taken into consideration during the selection process of ordinary pumps? Is it mainly used to determine the pressure rating of downstream pipelines?
The head at the shut-off point (lock-up point) of a centrifugal pump must not exceed a certain value. If this head is too high, it can lead to overpressure in the pipes and the system; as a result, the system may need to operate at a higher pressure level, which increases the cost of construction. The ratio of the shut-off point head to the design head is generally between 1.2 and 1.3. Additionally, the shut-off point head must not be less than 1.1 times the design head; if this condition is not met, rework is required, or even the pump needs to be replaced~~