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How does gas inside the pump affect its inability to generate pressure?

2017-05-17View Original

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How does air in the pump affect its inability to build pressure? I suddenly remembered a question from a long time ago: a colleague said that the pressure couldn’t be generated, so I should increase the outlet size; after a while the gas ran out, which meant that the gas and liquid were both flowing out together. But I also heard another theory, that gas is being re-pumped into the exhaust system. It might mean protecting the pump, or could it be that the gas really can carry it away? I’m a bit confused; could a fellow user help analyze this? ?
Reply #22017-05-17
The air should be vented first; otherwise, it will damage the equipment. Also, has it been checked whether the inlet filter is clogged?
Reply #32017-05-17
The air should be vented first; otherwise, it will damage the equipment. Also, has it been checked whether the inlet filter is clogged?
Reply #42017-05-17
It depends on how much gas there is; if it’s a small amount, it can be released through the outlet. If there are many, it definitely requires refilling the pump. Because the density of air is much lower than that of water, fallen leaves cannot be discharged if they cannot reach a certain height due to their rotation. You can search for “qi fu” on Baidu; I hope it will help you
Reply #52017-05-17
If the density is low, it floats on top; the various concepts still aren’t connected together – what’s the relationship with density? I understand gas entrapment – there’s gas inside the pump, so it can’t build pressure. Thank you.
Reply #62017-05-18
This involves the issue of pressure inside the pump chamber compared to standard atmospheric pressure; I’m not able to explain it clearly, and a professional needs to address it.
Reply #72017-05-18
For surface pumps, if air is not removed during filling, it can lead to air locking. For submersible pumps, if the air is not completely removed, the pump will not generate pressure; however, if air is removed promptly, the pump will gradually build up pressure. Nevertheless, care must be taken with substances with low boiling points to prevent cavitation caused by a lack of pressure over an extended period~~
Reply #82017-05-18
The air should be released first before starting the pump, to prevent air entrapment

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