Is it necessary to install an exhaust valve at the outlet of a centrifugal pump?
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As the title suggests, is it necessary to add an exhaust valve at the outlet of the centrifugal pump? ? How significant is the role of this exhaust valve? ? ? Are there any criteria for whether to increase or not? ? Thank you!
If the pump outlet is connected to equipment at atmospheric pressure, an exhaust valve is not necessary
It is not necessary to add one for ordinary centrifugal pumps; it is even less necessary if the medium being transported is at a higher level. Basically, by opening the inlet valve and slightly opening the outlet or using a pressure gauge for drainage, the pump will fill up. But for some delicate ones, it’s better to add them, like high-speed centrifugal pumps
It’s best to add one more element: a vent valve that is opened before starting the pump, so as to check whether the pump is filled with liquid. This prevents cavitation from occurring due to insufficient liquid in the pump, which could damage the impeller. .
Either an exhaust valve or a condensate guide valve is sufficient.
It would be better to add one more component: a valve that opens before the pump starts, so as to check whether the pump is filled with liquid. Pressure gauge should be used to monitor the exhaust process, but using a pressure gauge every time is also quite troublesome
Generally, there is a vent valve to prevent gas from accumulating in the pump, which could cause gas locking during pump startup
1. Whether it’s on the pump body or at the outlet, installing one costs very little; don’t sacrifice something important for a trivial expense； 2. It is recommended that pump operation be standardized ； 3. If it is a material that vaporizes easily, its addition is necessary ；