![]() ![]() 67 7.3 User with Challenge-Response card. 66 7.2 Framed User Authenticating with CHAP. 64 6.2 Recommended Registration Policies. RFC 2865 RADIUS June 2000 5.30 Called-Station-Id. The officially assigned port number forġ. RADIUS was done using UDP port number 1645, which conflicts with the Server which desires to authenticate its links and a shared This document describes a protocol for carrying authentication,Īuthorization, and configuration information between a Network Access Which may develop a successor protocol that better addresses the Readers of this document may find itīeneficial to track the progress of the IETF's AAA working group, Large scale systems, in part because it does not include provisionsįor congestion control. That it can suffer degraded performance and lost data when used in This protocol is widely implemented and used. Distribution of this memo is unlimited.Ĭopyright (C) The Internet Society (2000). Official Protocol Standards" (STD 1) for the standardization stateĪnd status of this protocol. Please refer to the current edition of the "Internet Internet community, and requests discussion and suggestions for This document specifies an Internet standards track protocol for the Remote Authentication Dial In User Service (RADIUS) Unless the bore and the piston or rod remain concentric by the hardware, this can cause the entire gap to shift to one side, creating a diametrical gap (see diagram below).RFC 2865: Remote Authentication Dial In User Service (RADIUS) The concern with extrusion is that at a higher pressure (especially with soft elastomer O-rings), the O-ring can be forced into the small gap between the piston or rod, and the bore. ![]() However, it is not typically a concern for face type seals as the metal parts to be sealed are in contact, line-to-line. Elastomers can have coefficients of thermal expansion 7 to 20 times higher than that of metals, such as steel.Įxtrusion is a concern for radial seals where there is gap between the piston and the bore or between the rod and the bore. It is important to note that there are significant differences in the coefficients of thermal expansion between the O-ring material and the groove materials. This is a general rule and there may occasionally be exceptions. For dynamic applications, 10 or 15 % volume swell is a reasonable maximum, unless special provisions are made to the gland design. For static O-ring applications volume swell up to 30 % can usually be tolerated. Volume change is the increase or decrease of the volume of an elastomer after it has been in contact with a fluid, and is measured in percent (%). Groove fill of the installed O-ring should not be more than 85 % to allow for possible O-ring thermal expansion, volume swell due to fluid exposure and effects of tolerances. It is important to consider the groove fill of the installed O-ring to avoid detrimental effects on radial sealing performance. smaller than 20 mm, this is not always possible due to tolerance issues, which can result in a greater O-ring O.D. greater than 250 mm, or 5% for O-rings with an I.D. ![]() should not exceed 3% of the rod gland diameter for O-rings with an I.D. The O-ring's outside diameter (O.D.) should be at least equal to or larger than the rod gland diameter to give interference on the O-ring's O.D. In dynamic applications, it is important to keep the maximum stretch to 5% or less to avoid detrimental effects on sealing performance.įor hydraulic and pneumatic rod sealing applications To minimize this range of stretch (including the maximum stretch) it is necessary to minimize the tolerance of the piston gland diameter, and have a less stringent requirement for the minimum O-ring stretch. For O-rings with an inside diameter smaller than 20 mm, this is not always possible as it can result in a wider range of stretch. The O-ring's inside diameter (I.D.) should stretch between 2% and 5% for dynamic applications and between 2% and 8% for static applications. Ceramic Components Mechanical Seals Protector Productsįor hydraulic and pneumatic piston sealing applications ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |