What type of valve should be used as the shut-off valve on the pump inlet pipe of DN65?
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Ball valve? Butterfly valve? Stop valve? I’m really not sure which valve is the most suitable to choose I sought advice from my seniors
All three types of valves have been seen in use. Butterfly valves are generally not recommended as their sealing performance is poor. I think what’s important is your operating conditions. A detailed description is needed in order to give a recommendation.
Ball valves are ideal for cutting off flow, of course it depends on whether the conditions of your medium are suitable
The medium is water; it is used to shut off the inlet pipeline of the multi-stage centrifugal pump to facilitate maintenance. The pipe diameter is DN65, and the head of the multi-stage centrifugal pump is 54 m
Is a DN65 ball valve a bit too bulky?
Since the medium is water, a soft-sealed butterfly valve can be used
For your application, a gate valve is definitely the right choice; I don’t recommend ball valves as they are a waste of resources. As for butterfly valves, it depends on the practices of each company – they are used in pipes with small diameters and where reliability isn’t critical, and can be used interchangeably with gate valves.
Okay, I got it. Thank you!
I understand, thank you! ! ! ! ! ! !
Either gate valves or globe valves will work; it depends on which type of valve is used more frequently in the installation – the one that is used more often should be chosen, as it makes replacement and maintenance easier.
The pump inlet valve has nothing to do with the outlet pressure at all. The pressure in the inlet pipeline is generally atmospheric pressure plus the head difference from the water tank; it shouldn’t exceed 1 kilogram, I think. A valve of 16 kilograms is sufficient; gate valves and globe valves are recommended.