BS ISO 2861:2020 pdf download.Vacuum technology — Dimensions of
clamped-type quick-release couplings.
1 Scope This document specifies the dimensions of the clamped-type quick-release couplings used in vacuum technology, as well as those of the O-rings and their carriers associated with these couplings, used to ensure vacuum tightness. NOTE The dimensions retained for the coupling diameter ensure the compatibility of the quick-release coupling with the corresponding vacuum flanges specified in ISO 1609 [1] .
2 Normative references There are no normative references in this document.
3 Terms and definitions For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at https:// www .iso .org/ obp — IEC Electropedia: available at http:// www .electropedia .org/
3.1 clamped-type quick-release coupling connection which may be joined or separated without the use of tools Note 1 to entry: It ensures vacuum tightness associated with the O-rings and their carriers. Note 2 to entry: The types and dimensions of clamps to tight couplings are not specified in document. Note 3 to entry: See Figure 1. [SOURCE: ISO 14617-3:2002, 3.15, modified — "clamped-type" has been added to the term; Notes 1 to 3 are additional to the original definition.]
5 Requirements 5.1 Coupling Dimensions of couplings shall be in accordance with Table 1. See Figure 2. The selection of the material shall be compatible with the requirements for the couplings. Considerations may include service temperature, sealing capacity, corrosion-resistance, magnetic permeability, the type of seal gasket (O-ring) used and dimensions. NOTE Austenitic stainless steel is commonly used, but it is not the intent of this document to specify or limit the choice of coupling material to austenitic stainless steel.
5.2 O-ring Dimensions of O-rings shall be in accordance with Table 2. See Figure 3. The O-ring shall be of elastomer. The selection of the elastomer shall be compatible with the requirements for the couplings. Considerations may include service temperature, sealing capacity, corrosion-resistance and dimensions. NOTE Fluorocarbon rubber is commonly used, but it is not the intent of this document to specify or limit the choice of O-ring material to rubber.
5.3 O-ring carrier Dimensions of O-ring carriers shall be in accordance with Table 3. See Figure 4. The selection of the O-ring carrier shall be compatible with the requirements for the couplings. Considerations may include service temperature, sealing capacity, corrosion-resistance, magnetic permeability, the type of seal gasket (O-ring) used and dimensions. NOTE Austenitic stainless steel is commonly used, but it is not the intent of this document to specify or limit the choice of O-ring carrier material to austenitic stainless steel.BS ISO 2861 pdf download.