The Change of temperature is one of the key factors that affect the sealing performance and the service life of sealing parts. Low temperature will make polyurethane or rubber seals freeze and become brittle and elastic, which will affect the sealing performance and even reduce the service life of seals. The high temperature will make the sealing part volume expand and soften, the friction resistance of the seal will increase rapidly soften, the friction resistance of the seal will decrease when moving, which will also affect the sealing performance and service life of the seal. The over temperature values depend on different factors, the main ones being:
1. Rod and Bore roughness
4. Fluid to be retained
6.Sealing lip shape
Considering all temperatures involved, the main item that determines the seal resistance is the material it is made of. For each material type, typical operating temperatures are taken into consideration, that can vary considerably depending on the seal profile.
Post time: Aug-22-2019