GB/T5744-2008 Quick Closing Valve

GB/T5744-2008 Quick Closing Valve is a Chinese national standard that specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation, and storage of quick closing valves. These valves are used in marine filed to quickly shut off the flow of fluid in pipelines in case of emergencies or maintenance work.

Overview

Based Parameters

Type: AS, AQ, ASS, AQS/BS, BQ, BSS, BQS;

Nominal Pressure: 0.25MPa

Nominal Diameter: DN20-DN150MM

Cylinder Working Pressure: 0.3-0.7MPa

Drawing

Drawing of GB T5744-2008 Quick Closing Valve.jpg

Drawing of GB T5744-2008 Quick Closing Valve1.jpg

AS/BS/AQ/BQ

Nominal Diameter	L		H		L1	L2	D	D1	D2	b	d0	n
	AS	BS	AS	BS
	AQ	BQ	AQ	BQ
20	150	95	240	320	143	44	95	68	48	11	13	4
25	160	100	242	325			105	73	56	12	13	4
32	180	105	245	330			115	83	64	13	15	6
40	200	115	274	365		48	125	93	74
50	230	125	283	381		49	135	103	84
65	290	145	325	437	155	58	155	123	104	14
80	310	155	350	466	155	58	170	138	118			8
100	350	175	375	500	295	62	190	158	138			8
125	400	200	400	540	300	68	215	183	164			10
150	480	225	430	580	310	75	240	208	190			12

ASS/BSS/AQS/BQS

Nominal Diameter	L		H		L1	L2	D	D1	D2	b	d0	n
	ASS	BSS	ASS	BSS
	AQS	BQS	AQS	BQS
20	150	95	240	320	143	44	90	65	50	14	11	14
25	160	100	242	325			100	75	60	14	11
32	180	105	245	330			120	90	70	16	14
40	200	115	274	365		48	130	100	80
50	230	125	283	381		49	140	110	90
65	290	145	325	437	155	58	160	130	110
80	310	155	350	466	155	58	190	150	128	18	18
100	350	175	375	500	295	62	210	170	148	18
125	400	200	400	540	300	68	240	200	178	20		18
150	480	225	430	580	310	75	265	225	202	20		18