GB/T 585-1999 Type A/AS Flanged Stop Check Valve | Marine Cast Steel Dual-Purpose Valve

GB/T585-1999 Type A/AS Flanged Stop Check Valve

GB/T 585-1999 Type A/AS flanged stop check valve is engineered to Chinese national shipbuilding standards, featuring a cast steel body with flanged ends and an innovative dual-function design that combines manual shut-off capability with automatic backflow prevention in a single valve body. Equipped with a precision-machined disc and stem assembly, this versatile valve delivers reliable flow regulation and dependable non-return performance, specifically designed for space-efficient installation in marine piping systems where both functions are required

Overview

Appliation: Widely installed on commercial vessels, cargo ships, tankers and offshore platforms for controlling seawater, freshwater, fuel oil and lubricating oil flow while simultaneously preventing reverse flow in critical pipeline systems. Also used in shipbuilding yards, marine engineering projects and port facilities where GB-standard dual-purpose valves are needed to save installation space and reduce piping complexity by combining stop and check valve functions into one unit.

Material Specification:

Parts Name		Material Name	Marks
Cover		Cast steel	ZG230-450
Disc		High-quality Carbon steel	25
Stem		Stainless steel	2Cr13
Disc seal ring		Stainless steel (welded)	H2Cr13
Body seal ring	PN ≤ 2.5	Stainless steel (welded)	H1Cr18Ni9Ti
	PN ≥ 4.0		H2Cr13

Technical Specification:

Nominal Pressure (MPa)	Nominal Diameter (mm)	Available Medium
1	65 ~ 300	Fresh water, Lubricant oil, Fuel oil, steam of 300 ℃ and under.
1.6	100 ~ 250
2.5	20 ~ 150
4	65 ~ 100	Fresh water, Lubricant oil, Fuel oil, steam of 400 ℃ and under.
6.4	20 ~ 50

Drawing:

Dimension:

PN1.0、1.6、2.5MPa A Type Elementary Dimensions(Unit: mm)

PN (Mpa)	DN (mm)	Frame dimension		t	Flange					Bolt		hand wheel		Lift Range m	Weight (kg)
PN (Mpa)	DN (mm)	L	H≈	t	D	D₁	D₂	D₀	b	n	Th	D₀	S	Lift Range m	Weight (kg)
1	65	290	308	6	155	123	104	15	14	6	M14	140	12	17	14.7
	80	310	339	7	170	138	118			8		160	14	20	18.9
	100	350	364	8	190	158	138			8		180	14	25	28.4
	125	400	414	8	215	183	164			10		200	17	32	37.9
	150	480	468	9	240	208	190			12		200	17	38	50.7
1.6	125	400	453	8	225	187	168	17	15	10	M16	250	22	32	44.2
1.6	150	480	505	9	255	217	196	17	15	12	M16	280	24	38	57.7
2.5	20	150	217	6	95	68	48	13	11	4	M12	80	8	7	4.4
	25	160	217		105	73	56	13	12	4	M12	80	8	7	5
	32	180	236		115	83	64	15	13	6	M14	100	9	9	6.8
	40	200	260	7	125	93	74					120	11	11	9.1
	50	230	288		135	103	84					140	12	14	12.9
	65	290	335		170	132	110	17	15	8	M16	160	14	17	18.5
	80	310	362		185	147	126		16	8		200	17	20	24.3
	100	350	417	8	205	167	146		16	10		250	22	25	34.4
	125	400	481	9	240	196	172	21	19	10	M20	280	24	32	51.4
	150	500	537	9	270	226	200	21	20	12	M20	320	27	38	68.1

N4.0, 6.4MPa A-type Dimensions (mm)

PN (Mpa)	DN	Frame dimension		Flange									Bolt		hand wheel		Lifting Range m	Weight (kg)
PN (Mpa)	DN	L	H≈	t	D	D₁	D₂	D₃	D₄	F	d₀	b	n	Th	D₀	S	Lifting Range m	Weight (kg)
4	65	310	409	8	175	137	118	110	94	3	17	18	8	M16	250	22	17	34.6
	80	350	436	9	190	152	130	121	105	3	17	18	8	M16	250	22	20	39.6
	100	400	466	9	225	181	157	150	128	4	21	21	10	M20	280	24	25	49.4
6.4	20	160	261	7	105	73	58	51	35	3	13	13	6	M12	100	9	7	7.5
	25	180	272		115	83	66	58	42		15	15		M14	120	11	9	8.5
	32	200	304		125	93	74	66	50		15	17		M14	120	11	11	10.2
	40	230	334		145	107	84	76	60		17	19		M16	160	14	14	17.4
	50	250	354	8	155	117	96	88	72		17	20		M16	180	14	13	22.1

PN1.0、1.6MPa AS type Elementary Dimensions(Unit:mm)

PN (Mpa)	DN (mm)	Frame dimension		thickness	Flange					bolt		hand wheel		Lifting Range m	Weight (kg)
PN (Mpa)	DN (mm)	L	H≈	thickness	D	D₁	D₂	D₀	b	n	Th	D₀	S	Lifting Range m	Weight (kg)
1	200	600	603	10	340	295	268	22	24	8	M20	360	27	50	109
	250	730	706	11.5	395	350	320		26	12		450	32	65	167
	300	850	796	13	445	400	370		26	12		500	36	75	225
1.6	100	350	417	8	220	180	158	18	18	8	M16	250	22	25	34.2
	125	400	453	8	250	210	184	18	18		M16	250	22	32	45.5
	150	480	505	9	285	240	212	22	22		M20	280	24	38	66.6
	175	540	558	10	315	270	242					360	27	45	92.2
	200	600	625	10	340	295	268			12		450	32	50	121
	250	730	729	11.5	405	355	320	26	26	12	M24	500	36	65	180

PN2.5MPa AS type Elementary Dimensions(Unit:mm)

PN (Mpa)	DN	Frame dimension		thickness	Flange					bolt		hand wheel		Lifting Range m	Weight (kg)
PN (Mpa)	DN	L	H≈	thickness	D	D₁	D₂	D₀	b	n	Th	D₀	S	Lifting Range m	Weight (kg)
2.5	20	150	217	6	105	75	58	14	16	4	M12	80	8	7	5.3
	25	160	217		115	85	68	14	16		M12	80	8	7	6.1
	32	180	236		140	100	78	18	18		M16	100	9	9	8.8
	40	200	260	7	150	110	88		18			120	11	11	10.8
	50	230	288		165	125	102		20	8		140	12	14	14.5
	65	290	335		185	145	122		22			160	14	17	21.8
	80	310	362	8	200	160	133		24			200	17	20	28.7
	100	350	417	8	235	190	158	22	24		M20	250	22	25	39.8
	125	400	481	9	270	220	184	26	26		M24	280	24	32	59.9
	150	480	537	9	300	250	212	26	28		M24	320	27	38	79.8

PN4.0、6.4MPa AS Type Elementary Dimensions(Unit:mm)

PN (Mpa)	DN	Frame dimension		thickness	Flange								bolt		hand wheel		Lifting Range m	Weight (kg)
PN (Mpa)	DN	L	H≈	thickness	D	D₁	D₂	D₄	D₃	f	d₀	b	n	Th	D₀	S	Lifting Range m	Weight (kg)
4	65	290	409	8	185	145	122	94	110	3	18	22	8	M16	250	22	17	37.2
	80	310	436	9	200	160	133	105	121		18	24		M16	250	22	20	39.8
	100	350	466	9	235	190	158	128	150		22	24		M20	280	24	25	53.3
6.4	20	230	261	7	130	90	58	35	51		18	22	4	M16	100	9	7	9.1
	25	230	272		140	100	68	42	58		18	24		M16	100	9	7	10.8
	32	260	304		155	110	78	50	66		22	24		M20	120	11	9	12.8
	40	260	334		170	125	88	60	76			26			160	14	11	21.4
	50	300	354	8	180	135	102	72	88			26			180	14	13	27