ISO 2861-2020 PDF

Full title and description

ISO 2861:2020 — Vacuum technology — Dimensions of clamped-type quick-release couplings. This International Standard specifies the dimensional requirements for clamped-type quick‑release couplings used in vacuum technology, together with associated O‑rings and O‑ring carriers to ensure vacuum tightness; dimensions are retained to ensure compatibility with corresponding vacuum flanges (see ISO 1609).

Abstract

This document defines the sizes and dimensional tolerances for clamped‑type quick‑release couplings and for the O‑rings and carriers used with those couplings in vacuum systems. The standard’s dimensional choices are intended to ensure interchangeability and sealing compatibility with the vacuum flanges specified in ISO 1609.

General information

• Status: Published (confirmed as current following review).
• Publication date: February 17, 2020 (Edition 2, 2020).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 23.160 (Vacuum technology).
• Edition / version: Edition 2 (2020).
• Number of pages: 6.

Source: ISO catalogue entry and publication record for ISO 2861:2020 (status and bibliographic details confirmed by ISO).

Scope

ISO 2861:2020 specifies the dimensions for clamped‑type quick‑release couplings used in vacuum technology and the dimensions of the mating O‑rings and O‑ring carriers required to achieve vacuum tightness. The standard focuses on geometry and dimensional interchangeability (not on material specifications) and retains coupling diameters to maintain compatibility with the vacuum flanges covered by ISO 1609.

Key topics and requirements

• Dimensional definitions and nominal sizes for clamped‑type quick‑release couplings (coupling diameters and mating interfaces).
• Specified dimensions for O‑rings and O‑ring carriers used with the couplings to ensure vacuum tightness.
• Tolerances and form/fit requirements to permit interchangeability across manufacturers.
• Compatibility requirement with ISO 1609 flange dimensions (to ensure interchangeability with corresponding vacuum flanges).
• Standard does not set material or surface finish mandates beyond what is necessary for sealing and interchangeability; it concentrates on geometrical and dimensional requirements.

Typical use and users

This standard is used by vacuum‑system designers, manufacturers of vacuum components (couplings, clamps, centering rings, flanges), laboratory equipment builders, procurement teams specifying interoperable parts, quality and testing laboratories, and maintenance engineers who require standardized, interchangeable quick‑release coupling interfaces for vacuum systems.

Related standards

Primary related standard: ISO 1609 (vacuum flange dimensions) — ISO 2861's coupling diameters are chosen for compatibility with ISO 1609 flange types. ISO 2861:2020 supersedes ISO 2861:2013 (withdrawn). Also relevant are other ISO and DIN vacuum component standards (flange and clamp systems) that govern complementary parts and interchangeability.

Keywords

vacuum technology; quick‑release coupling; clamped‑type coupling; O‑ring; O‑ring carrier; flange compatibility; interchangeability; dimensions; ISO 2861; ISO 1609.

FAQ

Q: What is this standard?

A: ISO 2861:2020 is an International Standard that specifies the dimensions of clamped‑type quick‑release couplings used in vacuum technology, including the dimensions of associated O‑rings and O‑ring carriers.

Q: What does it cover?

A: It covers geometric dimensions, nominal sizes and tolerances for clamped quick‑release couplings and the O‑ring components needed for vacuum sealing; it ensures dimensional compatibility with corresponding vacuum flanges (see ISO 1609). It does not primarily prescribe materials beyond requirements implied by sealing function.

Q: Who typically uses it?

A: Manufacturers of vacuum components, system designers, laboratory equipment producers, procurement and quality engineers, and maintenance personnel who need standardized, interchangeable vacuum couplings.

Q: Is it current or superseded?

A: ISO 2861:2020 is the current edition (Edition 2, published February 2020). The previous edition ISO 2861:2013 was withdrawn and replaced by the 2020 edition. The ISO record shows the 2020 edition was published 17 February 2020 and was reviewed and confirmed in 2025, so it remains current.

Q: Is it part of a series?

A: ISO 2861 is part of the family of vacuum‑technology standards maintained by ISO/TC 112 and is intended to work together with flange and vacuum component standards such as ISO 1609 (flange dimensions) to ensure interchangeability of vacuum fittings and components.

Q: What are the key keywords?

A: Vacuum technology, quick‑release coupling, clamped‑type, O‑ring, O‑ring carrier, flange compatibility, dimensions, interchangeability, ISO 2861, ISO 1609.