GB/T 593-1993 Type A/AS Flanged Packed Cock | Bronze & Cast Iron Marine Plug Valve

GB/T593-1993 A/AS Type Flanged Bronze,cast iron Packed Cocks

Our GB/T 593-1993 Type A/AS flanged packed cock is engineered to Chinese national shipbuilding standards, featuring a robust bronze or cast iron body with flanged ends and a packed gland design that ensures leak-tight sealing even under prolonged service conditions. With a simple 90-degree rotational operation and straight-through flow path, this plug valve delivers quick on-off control with minimal flow resistance, making it a reliable and cost-effective solution for general-purpose marine fluid handling applications.

Overview

Application: Widely installed on commercial vessels, cargo ships, fishing boats and offshore platforms for on-off control of seawater, freshwater, fuel oil and lubricating oil in low-pressure pipeline systems where quick operation and low flow resistance are required. Also commonly used in shipbuilding yards, marine engineering projects and port facilities as a cost-effective alternative to globe valves, particularly suitable for bilge systems, ballast lines and general service piping where frequent operation and simple maintenance are priorities.

Material Specification:

Parts Name	Material
Parts Name	Name	Marks
Bronze cock main body	Cast tin bronze	ZCuSn10Zn2 or ZCuSn5Pb5Zn5
Cast iron cock main body	Cast iron	HT200
Disc	Cast tin bronze	ZCuSn10Zn2 or ZCuSn5Pb5Zn5

Technical Specifications:

Pattern	Name	Nominal Pressure PN (MPa)	Nominal Diameter DN (mm)	Available Medium
A, AS	Straight-through packed plug cock	0.6	20 ~ 80	Sea water, fresh water, lubricant, fuel oil

Drawing:

Dimensions:

A Type bronze packed plug cocks

DN	Structure dimension			Thickness δ	flange					bolt		Handle	Weight (kg)
DN	L	H	H₁	Thickness δ	D	D₁	D₂	d₀	b	n	Th.	Lo	Weight (kg)
20	145	139	40	4	95	68	48	13	12	4	M12	125	3
25	155	149	41	4	105	73	56	13	13	4	M12	140	3.7
32	165	168	48	5	115	83	64	15	13	6	M14	160	4.6
40	190	192	56		125	93	74	15	14	6	M14	180	6.9
50	205	243	65		135	103	84	15	14	6	M14	230	9.7
65	225	285	80	6	155	123	104	15	14	6	M14	250	12.4
80	245	324	96	6	170	138	118	15	14	6	M14	320	18.8

A Type iron packed plug cocks

DN	Frame Dimension			Thickness	Flange					Bolt		Handle	Weight (kg)
DN	L	H	H₁	δ	D	D₁	D₂	d₀	b	n pcs.	Th	L₀	Type A
20	145	141	42	7	95	68	48	13	14	4	M12	125	3.01
25	155	151	43		105	73	56	13	14	4	M12	140	3.84
32	165	170	50		115	83	64	15	15	6	M14	160	4.7
40	190	193	57		125	93	74		16			180	6.6
50	205	245	67		135	103	84		16			230	10.2
65	225	286	81	8	155	123	104		15			250	13.4
80	245	328	100	8	170	138	118		15	8		320	19.7

AS Type bronze packed plug cocks

DN	Frame Dimension			Thickness	Flange					Bolt		Handle	Weight (kg)
DN	L	H	H₁	δ	D	D₁	D₂	d₀	b	n pcs.	Th	L₀	Weight (kg)
20	150	139	40	4	90	65	50	11	12	4	M10	125	3
25	160	149	41	4	100	75	60	11	14		M10	140	3.7
32	180	168	48	5	120	90	70	14	15		M12	160	5
40	200	192	56		130	100	80		16		M12	180	7.5
50	230	243	65		140	110	90		17		M12	230	10.7
65	290	285	80	6	160	130	110		17		M12	250	13.6
80	310	324	96	6	190	150	128	18	19		M16	320	20.3

AS Type iron packed plug cocks

DN	Frame Dimension			Thickness	Flange					Bolt		Handle	Weight (kg)
DN	L	H	H₁	δ	D	D₁	D₂	d₀	b	n pcs.	Th	L₀	Type AS
20	150	141	42	7	90	65	50	11	14	4	M10	120	3.1
25	160	151	43		100	75	60	11	14		M10	140	4
32	180	170	50		120	90	70	14	16		M12	160	5
40	200	193	57		130	100	80					180	7.3
50	230	245	67		140	110	90					230	10.4
65	290	286	81	8	160	130	110					250	14.4
80	310	328	100	8	190	150	128	18	18		M16	320	20.8