Types of Mechanical Seal

Mechanical Seal is used to control rotating shaft leakage. There are following main types;
Balanced Mechanical Seals
Unbalanced Mechanical Seals
Pusher Type Mechanical Seals
Non Pusher Type Mechanical Seal
Bellow Type Mechanical Seals
Cartridge Type Mechanical Seals
This video covers following;
Single Spring Mechanical Seal
Multi Spring Mechanical Seal
Conical Spring Mechanical Seal
Metal Bellow Mechanical Seal
Teflon Bellow Mechanical Seal
Cartridge Type Mechanical Seal
Applications of different types of mechanical seals are as under;
Balanced mechanical seals are particularly suited to higher operating pressures, typically above 200 PSIG. They are also a good choice when handling liquids with low lubricity and higher volatility.
Unbalanced mechanical seal types are commonly employed as a more economical option to the more complex balance seal. Unbalanced seals may also exhibit less product leakage due to tighter control of the face film, but as a result can exhibit much lower mean time between failure. Unbalanced seals are not recommended for high pressure or most hydrocarbon.
Pusher seals utilize one or multiple springs to maintain seal closing forces. The springs can be in the rotating or stationary element of the mechanical seal. Pusher type seals can provide sealing at very high pressures but have a drawback due to the elastomer under the primary seal face that can be subjected to wear as the face moves along the shaft/sleeve during operation.
Non-pusher seals utilize a metal or elastomeric bellows to maintain seal closing forces. These seals are ideally suited to dirty and high temperature applications.
Bellows seals are limited to medium/lower applications.
Cartridge type mechanical seals incorporate all of the seal elements into a single assembly. This dramatically reduces the potential for assembly error and the time require for seal replacement .
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[@mechanicalengineeringpract140]

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[@afzalamanullah8987]

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[@mechanicalengineeringpract140]

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[@zahidgujjar1888]

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[@mechanicalengineeringpract140]

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[@mechanicalengineeringpract140]

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[@mechanicalengineeringpract140]

Welcome, pls watch my bearing videos especially bearing first digit explained, bearing od, clearance etc

[@mechanicalengineeringpract140]

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[@mechanicalengineeringpract140]

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[@mechanicalengineeringpract140]

Desired video on 222 uploaded pls watch n share with your Friends
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[@mechanicalengineeringpract140]

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[@arvindyadav3347]

Different pusher type mechanical seal non pushe type mechanical seal please give me answer

[@mechanicalengineeringpract140]

Difference between both types of seal are the use in different pressure applications, media and permissible pressure limits. Pusher type seal rotates axially with shaft and the spring of the seal pushes dynamic part towards stationary part in order to make proper contact with faces of both parts in such a way that liquid leaks could be controlled as per design of spring tension required for max pressure limits whatever it is for pusher type mechanical seal.
Non pusher type also known as elastomeric bellow seal is consisting of bellow assembly, has a static stationary seal which does not rotates axially with shaft but it is stayed against the shaft and bellow is the component of non pusher seal that acts as both the load element. In short, non pusher mechanical seal are designed to maintain a constant contact force between the sealing faces.

[@umakantsingh2600]

Tefon bellow mechanical seal ke bare me bataye

[@mechanicalengineeringpract140]

Although Teflon bellow type is discussed but in crux, i will upload soon in details
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[@MohanPatel-gp6qi]

Balance ओर unbalance ka matlab kya hota hai 🙏

[@mechanicalengineeringpract140]

The load that acts across the seal faces of mechanical seal is mechanical seal balance. Balance ratio is a ratio of the hydraulic closing area to the hydraulic closing area of mechanical seal.
Unbalanced seals have balance ratios from 110 to 160% whereas unbalanced seals have 60 to 70% and used in stepped shaft. In Short, a seal with a balance ratio B100 is unbalanced mechanical seal.
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[@mechanicalengineeringpract140]

Due to typographically error, kind find edited reply as follows;
The load that acts across the seal faces of mechanical seal is mechanical seal balance.
Balance ratio is a ratio of hydraulic closing area to the hydraulic opening area of mechanical seal. Unbalanced seals have balance ratios from 110 to 160% whereas balanced seal have 60 to 90% and used in stepped shaft.
In short, a seal with a balance ratio B>100% is called Unbalanced mechanical seal & seal with a balance ratio B

[@user-eg7en7gy5b]

😢اگر سیل نمبر معلوم نہ ہو تو کیسے معلوم کریں

[@mechanicalengineeringpract140]

Let,s take example of single spring mechanical seal (pusher type). Take first shaft inner diameter for rotary part and then housing diametre and select as per width the required m seal

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Housing inner bore for selection of stationary part

[@mechanicalengineeringpract140]

You will find m seal by measuring of inner dia of rotary part n housing inner dia of stationary part of seal with corresponding width

[@mechanicalengineeringpract140]

Shaft od not id, typographical error pls
It is solid shaft so od, for hollow shaft, can be id of such type of shaft