ISO/TC 112/WG 3 - Vacuum hardware

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].

This document specifies the dimensions of fixed or rotatable bolted knife-edge flanges used in vacuum systems for pressures ranging from atmospheric to as low as 10−11 Pa.

This document specifies the dimensions of non-knife-edge flanges and collars used in vacuum technology. The dimensions ensure interchangeability between bolted, clamped and rotatable flanges: a) whether the assembly be homogeneous (for example, bolted flanges or clamped flanges) or heterogeneous (for example, bolted flanges assembled with clamped flanges either by means of bolts or clamps or by means of bolts and rotatable flanges). b) whether the sealing rings used with the flanges be elastomer O-rings or metal sealing rings, provided that they are compatible with the linear sealing loads given in Annex A.

This document specifies mounting dimensions for vacuum pipeline fittings (elbows, tees and crosses) of knife-edge flanges for nominal bores from 16 mm to 200 mm.

This document specifies mounting dimensions for vacuum pipeline fittings (elbows, tees and crosses) of non knife-edge flange for nominal bores from 10 mm to 250 mm of the R5 series.

This document defines dimensions of right-angle valves that are compatible with the mounting dimensions of elbows defined in ISO 9803-1 and ISO 9803-2. This document covers right-angle valves with flanges defined in ISO 2861, ISO 1609 and ISO 3669.

ISO 27895:2009 specifies methods for the leak testing of vacuum valves used for control of gas flow or vacuum pressure in a vacuum system.It is applicable to vacuum valves that can be closed to leak rates less than 1 x 10-5 Pa m3/s for trace gas. The methods employ a sealing arrangement for the valve body, which is also specified in ISO 27895:2009. The methods are suitable for the verification of valve specifications. A valve leak rate less than the nominal leak rate specified by the manufacturer during and after the operation enables the specification of such valve operating conditions as operating pressure range, permissible pressure difference between ports, bake-out temperature or operating temperature, and life cycle.

ISO 3669:2017 specifies the dimensions of fixed or rotatable bolted knife-edge flanges used in vacuum systems for pressures ranging from atmospheric to as low as 10−11 Pa.

ISO 2861:2013 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.

ISO/TS 3669-2:2007 specifies the dimensions of fixed or rotatable bolted knife-edge style bakable flanges used in vacuum systems for pressures ranging from atmospheric to as low as 10-13 Pa.

ISO 9803-1:2007 specifies mounting dimensions for vacuum pipeline fittings (elbows, tees and crosses) of non-bakable and non knife-edge flange for nominal bores from 10 mm to 250 mm of the R5 series.

ISO 9803-2:2007 specifies mounting dimensions for vacuum pipeline fittings (elbows, tees and crosses) of knife-edge flanges for nominal bores from 16 mm to 200 mm.

ISO 21358:2007 defines dimensions of right-angle valves that are compatible with the mounting dimensions of elbows defined in ISO 9803-1 and ISO 9803-2. ISO 21358:2007 covers right-angle valves with flanges defined in ISO 2861-1, ISO 1609 and ISO 3669. ISO 3669 lists two flange series: preferred series, and secondary series. ISO 21358:2007 covers only the valves with flanges of the secondary series.

The specified dimensions ensure interchangeability between bolted, clamped and rotable flanges under special conditions. The main dimensions are tabled; linear sealing loads, bores for vacuum flanges and required outside tube diameters are specified.

Deals with flanges rigidly or rotatably bolted which are used in vacuum systems. Two series of flanges are specified: a preferred one, the main dimensions of which ensure compatibility with already standardized, non-bakable flanges (see ISO 1609) and a secondary series concerning flanges in common use.

ISO 2861-2:1980 specifies the dimensions of quick-release couplings of the screwed type as used in vacuum technology, as well as those of the “O” rings and the insert which are associated with these tailpieces to ensure coupling tightness. General information is also included which refers to the clamped quick-release coupling standardized internationally in ISO 2861-1, with which the screwed quick-release coupling specified in ISO 2861-2:1980 is compatible.

ISO 2861-1:1974 specifies the dimensions of quick-release couplings of the clamped type as used in vacuum technology, as well as those of the “O” rings and their carriers which are associated with these couplings to ensure vacuum tightness.