Common methods for measuring net positive suction head in domestic pump manufacturers
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According to API standards, when the difference between the device’s net positive suction head and the required net positive suction head is less than 1 meter, users can request a net positive suction head test. However, there are various methods for conducting such tests in China: some use closed-test benches, some involve lowering the water inlet level, and others involve reducing the size of the water inlet valve. What are the specific procedures for these different testing methods? What are the advantages and disadvantages?
If it is a pump manufacturer, a corresponding platform needs to be established. The simplest way for on-site testing is to use actual changes in water level to confirm accuracy. If the conditions are not met, a vacuum gauge must be installed after the suction inlet valve for measurement purposes.
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