Stenso - Hovedkatalog 2019

3.5 Pressure Differential pressure is zero or minimal for most applications. Where the radial shaft seals are subject to pressure, the sealing lip is pressed against the shaft leading to increased temperature. In most cases, increase in temperature can cause the sealing lip to turn around on the axis. At over 0.2 bar and high RPM or at over 0.5 bar and low RPM , back-up rings or specially developed radial shaft seals with thick dynamic lip and or metal a support need to be used. In the last case, we refer to our P-type (CC-P) Inspite of this and the shaft seals of type P, the allowable excess pressure is limited. On enquiry, we can supply shaft seals that have a specially reinforced sealing lip. These can withstand pressures above the allowable limit given. Standard sizes of radial shaft seals can be used when back rings are assembled. Back rings are costly and the necessary mounting space may not be always available. Many times, back rings cannot be used since they require very careful assembly and a very low radial run out. Specially developed radial shaft seals (P-types) are prefered here, when a more careful assembly and a lower radial run-out than the normal is required. 306 Shaft seals Type HW 460; allowable pressures Radial Lip Seal