What is a four-mechanical seal?
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Yesterday I came across a term called \"four mechanical seals\", used on rotary vane blowers. I don’t know what it means; I only know about single-face mechanical seals and double-face mechanical seals. Ask a question?
I’m wondering if it means that the Roots blower requires four sets of mechanical seals?
Oh, in the case of four sets, how is that used? Is it necessary to use four sets? Aren’t two sets enough? I don’t quite understand.
Could it be that the original poster misread it? Please quote the exact words – how is it possible to use four sets of seals for a Roots pump?
Four mechanical seals – not available on either Baidu or Google
I guess the poster is using a twin-screw pump; in that case, four sets of machine seals are needed
It’s likely that the original poster made a mistake or there was an error in the formatting of the information. The correct version might be: Term 4: Mechanical Seal, or 4. Mechanical Seal
Mechanical seal, I guess. If it’s a mechanical seal, then I know something about it; it’s one of the types of seals used for storage tanks.
The L-type Roots blower uses a labyrinth seal for transporting air, while a packing seal is used for transporting water gas and sulfur dioxide. For other series such as the RR type, it’s not clear
I have no experience with rotary vane blowers; I’m okay with other types of blowers
Maybe the original poster didn’t read carefully; by looking at the entire article, it might be easier to understand. I’ve never heard of “four mechanical seals”; it probably means: “The fourth item, mechanical seal””
It can’t be a scam, right? I really don’t know if there are four mechanical seals available now, or maybe some other high-tech devices. Even for high-tech and high-performance sealing requirements, I don’t think they are necessary for rotary vane pumps, unless they are used in highly dangerous situations involving highly toxic substances where extremely strict sealing standards are required.
I have never heard of such a concept; please, the original poster, visit the source for more details
Thank you all for your advice. The situation is as follows: the company needs to purchase a Roots blower, with a medium of 90% ammonia, a pressure rise of 90 KPA (from 150 KPA to 240 KPA), and a flow rate of 4–6 cubic meters per minute. The blower must be explosion-proof and leak-proof. Then there was a company that provided one marked with four mechanical seals. I think with the parameters I requested, dual mechanical seals should be sufficient, right? :)
. . . 4 mechanical seals – it’s probably because you need four sets of mechanical seals in total for the two rotors. Incidentally, the mechanical seals for Roots blowers are quite expensive
Well, what was said on the 15th floor is possible. Does that require a dual rotor? (I don’t understand.) Are the mechanical seals for Roots blowers expensive? :o
The medium contains ammonia, so explosion and leakage prevention are necessary; therefore, mechanical seals in series may be used, which requires four sets. Of course, double-end face seals may be more commonly used. A dry gas seal can also be used.
Such devices generally use expansion ring seals and labyrinth seals; I have never heard of this type of seal
The Roots blowers manufactured in Changsha by me here are of the dual-rotor type, use expansion ring seals, and there are a total of four sets.
Thank you all for your enthusiastic responses; I’ve learned a lot from them:victory:
Does that mean it’s produced by Sichuan Chuanmi?