Standard No.:	GB/T 4982-2003
English Name:	Vacuum technology—Quick release couplings—Dimensions—Part 1:Clamped type
Chinese Name:	真空技术 快卸连接器 尺寸 第1部分：夹紧型
Chinese Classification:	J15    Pipeline fittings
Professional Classification:	GB    National Standard
Source Content Issued by:	AQSIQ
Issued on:	2003-11-25
Implemented on:	2004-6-1
Status:	to be superseded
Superseded by:	GB/T 4982-2025 Vacuum technology - Dimensions of clamped-type quick-release couplings
Superseded on:	2026-2-1
Abolished on:	2026-02-01
Superseding:	GB/T 4982-1985 Vacuum technology clamped type quick release flange
Target Language:	English
File Format:	PDF
Word Count:	3000 words
Translation Price(USD):	85.0
Delivery:	via email in 1 business day

1 Scope This standard 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. Note: The dimensions retained for the coupling diameter ensure compatibility of the quick-release coupling with the corresponding vacuum flanges which are standardized in ISO 1609, Vacuum flange- Dimensions. 2. Coupling The diagram is shown in Figure 1, and the dimension is shown in Table 1.

Foreword i 1 Scope 2. Coupling 3 Elastomer “O”ring 4 “O”ring carrier 5 Clamp diagram and dimensions Annex A (Informative) Diagram and dimension of quick release coupling clamp