GB T/1852 Marine Flanged Cast Steel Steam Pressure Reducing Valve

GB T/1852 Marine Flanged Cast Steel Steam Pressure Reducing Valve

GB T/1852 Marine Flanged Cast Steel Steam Pressure Reducing Valve

Available medium：Steam of 300 °C and under.

Nominal Pressure (MPa): p1: 0.4~2.5; p2: 0.2~0.6/ 0.6~1.2

Nominal Diameter (mm): Inlet: 20~150; Outlet: 25~200

Overview

Application: This GB T/1852 Marine Flanged Cast Steel Steam Pressure Reducing Valve is designed for marine applications involving t≤300°C steam.

Material Specification:

Parts Name	Material
	Name	Marks
Body	Cast steel	ZG230-450
diaphragm	Cast tin Bronze	QSn6.5-0.1
spring	spring steel	50CrVA

Technical Specifications:

Model: GB T/1241 Male Threaded Forged Steel Stop Check Valve Type A

												Available medium
Nominal Diameter mm	Inlet DN1 import	20	25	32	40	50	65	80	100	125	150
Nominal Diameter mm	Outlet DN2 export	25	32	40	50	65	80	100	125	150	200
Steam Pressure Mpa	Inlet pressure p1	0.4 ~ 2.5										Steam of 300 °C and under
	Outlet pressure p2	0.2 ~ 0.6
	Outlet pressure p2	0.6 ~ 1.2
Note: The inlet pressure and the outlet pressure differential pressure is not smaller than 0.2Mpa.

Dimensions(mm)

Flange connection size according to GB T569

DN		Structure dimension			Flange connection size
					PN 2.5 Inlet							PN 1.6 Outlet
					D1	D2	D3	d1	bolt		b1	D4	D5	D6	d2	bolt		b2
DN1	DN2	L	H	h	D1	D2	D3	d1	n1	Th1.	b1	D4	D5	D6	d2	n2	Th	b2
20	25	170	250	75	95	68	48	13	4	M12	11	105	73	56	13	4	M12	12
25	32	170	250	75	105	73	56	13	4	M12	12	115	83	64	15	6	M14	13
32	40	200	260	80	115	83	64	15	6	M14	13	125	93	74
40	50	210	270	85	125	93	74					135	103	84
50	65	240	290	115	135	103	84					170	132	110	17	8	M16	15
65	80	240	300	115	170	132	110	17	8	M16	15	185	147	126		8		16
80	100	280	320	120	185	147	126		8		16	205	167	146		10
100	125	330	350	150	205	167	146		10		16	225	187	168		10
125	150	380	360	190	240	196	172	21	10	M20	19	255	217	196		12		20
150	200	470	425	225	270	226	200	21	12	M20	20	325	281	254	21	12	M20	20

Flange connection size according to GB T2501’s type S

DN		Structure dimension			Flange connection size
					PN 2.5 Inlet							PN 1.6 Outlet
					D1	D2	D3	d1	bolt		b1	D4	D5	D6	d2	bolt		b2
DN1	DN2	L	H	h	D1	D2	D3	d1	n1	Th1.	b1	D4	D5	D6	d2	n2	Th	b2
20	25	170	250	75	105	75	58	14	4	M12	16	115	85	68	14	4	M12	16
25	32	170	250	75	115	85	68	14		M12	16	140	100	78	18		M16	18
32	40	200	260	80	140	100	78	18		M16	18	150	110	88
40	50	210	270	85	150	110	88				18	165	125	102
50	65	240	290	115	165	125	102				20	185	145	122				20
65	80	240	300	115	185	145	122		8		22	200	160	133		8		20
80	100	280	320	120	200	160	133				24	220	180	158				22
100	125	330	350	150	235	190	158	22		M20	24	250	210	184				22
125	150	380	360	190	270	220	184	26		M24	26	285	240	212	22		M20	24
150	200	470	425	225	300	250	212	26		M24	26	340	295	268	22	12	M20	24

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