What does the mechanical operation test of a centrifugal pump include?
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What does the mechanical operation testing done before leaving the factory include?
The records of performance tests and mechanical operation tests shall include: (1) performance curves and data, including total head, efficiency, shaft power, speed, and calculations for corrections, to produce H-Q, P-Q, and η-Q curves； (2) Vibration and temperature rise ； (3) Noise measurement value ； (4) NPSH experiment ； The NPSH test should be conducted in a factory setting, and: (1) when the difference between NPSHa and NPSHr is less than 1 m ； (2) When NPSH is required due to the conveying medium, NPSHr shall be determined under four different flow rates (60%, 80%, 100%, and 110% of the rated flow rate), with an error of 0% for NPSHr
Customers always request various tests, not realizing that these tests incur additional costs, and those costs are quite high, especially for imported pumps.
1(1) Performance curves and data, including total head, efficiency, shaft power, speed, and calculations of corrections, to generate H-Q, P-Q, and η-Q curves； (2) Vibration and temperature rise ； (3) Noise measurement value ； (4) NPSH experiment ； Among them, the NPSH experiment should be conducted in a factory test. 2(1) When the difference between NPSHa and NPSHr is less than 1 m ； (2) When NPSH is required due to the conveying medium, NPSHr shall be determined under four different flow rates (60%, 80%, 100%, and 110% of the rated flow rate), with an error of 0% for NPSHr
Are you conducting factory testing or commissioning after on-site installation? ? ?
Performance testing is a mandatory requirement, but mechanical operation is optional; it is not necessary to require both.
A mechanical operation test is used to evaluate the performance parameters of the pump while it is in operation. It is usually carried out at the rated capacity, and the duration is typically 1 hour or more (the exact time should be determined in consultation with the user). Test items: vibration of the pump and bearing housing, overall machine noise, temperature rise of the bearings of the pump and motor, etc