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English Translations » 【管道阀门技术圈】 » Butterfly valves are divided into sealed and unsealed types;

Butterfly valves are divided into sealed and unsealed types; how can the two be distinguished?

2018-01-11View Original

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In the valve model designation method for JBT308, butterfly valves are divided into sealed and unsealed types. How can the two be distinguished?
Reply #22018-01-12
I’ve never heard of sealed and unsealed types. Does the non-sealed type not require any leakage? I think you are referring to the difference between hard seal and soft seal.
Reply #32018-01-15
The selection specified in standard JBT308 is not between hard seal and soft seal!
Reply #42018-01-15
They have different functions: the sealed type, also known as the on/off type, is used for cutting off flow, while the unsealed type does not require valve sealing and is used to regulate the flow rate of the valve
Reply #52018-01-16
Thank you! Does that mean that when used as a shut-off valve, a butterfly valve cannot be the non-sealing type?

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Translated at 2026-07-21 04:19:34

Original: https://bbs.hcbbs.com/thread-1896011-1-1.html

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