Factors in Seals Selection

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Factors in Seals Selection

Several factors affect the performance of seals including: media type, media temperature, shaft finish, pressure, surface speed of shaft, etc.

Types of Motion

Types	Choices
Rotation	Any type of seal other than TX4
Reciprocating	TX4 seals (TC4, TB4.....)

Media

Media	Choices
Regular lubricants	Regular seals
Water, non lubrication liquids	Using two single-lip seals with grease or lubricants in between.
Chemicals	When sealing element material is not acceptable, try mechanical seal.

Pressure

General seals are not intended for pressurized conditions. However V types of seals can withstand pressure up to 3 kg/cm², such as TCV, TBV, and SBV, etc.

P type can withstand up to 10 kg/cm² , such as TCP....(1 kg/cm² = 14.2 psi)

Existence of Dust

Environment	Choice
No Dust	Single-lip Seals ( S Type)
Dust	Double-lip Seals ( T Type)

Temperature

The media temperature plus the friction between the seal and the shaft will result in the temperature of the seal to increase by as much as 40 degrees Celsius. Therefore, temperature plays a very important role in material selection.

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