CB-T 3197 Flanged Cast Steel Seawater Globe Check Valve

Item	Description
Product Name	CB-T 3197 Flanged Cast Steel Seawater Globe Check Valve
Certificates	ABS, LR, BV, DNV, RINA, CCS
FOB Price	Get Latest Price Now
Warranty	12 months (unless otherwise specified)
Place of Origin	China

Overview

1. SUBJECT CONTENT AND SCOPE OF APPLICATION

This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, and packaging of flanged cast steel sea water stop check valves (hereinafter referred to as "stop check valves") with flange connection dimensions in accordance with GB 569 and GB 2501.

This standard applies to stop check valves used in ship sea water piping systems with sea water and fresh water as the medium.

2. NORMATIVE REFERENCES

GB 569-65 - Ship flanges - Connection dimensions and sealing faces
GB 600-91 - General technical requirements for ship piping valves
GB 2501-89 - Ship flanges - Connection dimensions and sealing faces (four-position)
GB 3032-89 - Marking of ship piping accessories
GB 11698-89 - Ship flanges - Structural length for connecting metal valves
ZB/T U52 001-89 - Wall thickness of ship casting valves

3. PRODUCT CLASSIFICATION

3.1 TYPES

Types of stop check valves are specified as follows:
Type A - Straight-through stop check valve with flange connection dimensions per GB 569.
Type AS - Straight-through stop check valve with flange connection dimensions per GB 2501.
Type B - Right-angle stop check valve with flange connection dimensions per GB 569.
Type BS - Right-angle stop check valve with flange connection dimensions per GB 2501.

3.2 BASIC PARAMETERS

The basic parameters of stop check valves are shown in Table 1.

TABLE 1 - BASIC PARAMETERS OF STOP CHECK VALVES

TYPE	NOMINAL PRESSURE PN (MPa)	NOMINAL DIAMETER DN (mm)
A, AS, B, BS	1.6	40 ~ 150
	1.0	65 ~ 150
	0.6	200 ~ 250

3.3 STRUCTURAL LENGTH AND BASIC DIMENSIONS

3.3.1 The structure and basic dimensions of Type A and Type B stop check valves shall be in accordance with Figure 1, Figure 2, and Table 2.

TABLE 2 - BASIC DIMENSIONS OF TYPE A AND B STOP CHECK VALVES (UNIT: MM)

NOMINAL PRESSURE PN (MPa)	NOMINAL DIAMETER DN	STRUCTURAL DIMENSIONS				FLANGE CONNECTION DIMENSIONS							HANDWHEEL D0	LIFT m	WEIGHT (kg)
		L (Type A)	L (Type B)	H	L2	D	D1	D2	b	n	Th.				Type A	Type B
1.6	40	260	200	235	90	90	125	93	74	15	13	6	M14	120	11	12	9
	50	280	230	258	95	95	135	103	84	15	14	6	M14	140	12	15	11
	65	335	290	301	115	115	170	132	110	16	15	8	M16	160	14	19	19
	80	360	310	325	125	125	185	147	126	16		8	M16	200	17	23	22
	100	427	350	378	150	135	205	167	146	17	16	10	M16	250	22	28	36
	125	465	400	405	175	155	225	187	168			12	M16	250	22	35	60
	150	524	480	452	180	160	255	217	196	19	15	12	M20	280	24	42	81
1.0	65	310	290	277	115	115	155	123	104	15		4	M14	160	12	19	17
	80	345	310	304	125	125	170	138	118	16		8	M16	180	14	23	22
	100	374	350	325	150	135	190	158	138	18	14	8	M16	200	17	28	29
	125	426	400	366	175	155	215	183	164			10	M16	220	20	35	39
	150	487	480	415	180	160	240	208	190	20		12	M20	250	22	42	52
0.6	200	600	600	524	275	255	295	264	247		15			320	27	68	85
	250	743	730	612	325	275	365	327	306	17	16	14	M16	450	32	80	134

3.3.2 The structure and basic dimensions of Type AS and Type BS stop check valves shall be in accordance with Figure 1, Figure 2, and Table 3.

TABLE 3 - BASIC DIMENSIONS OF TYPE AS AND BS STOP CHECK VALVES (UNIT: MM)

NOMINAL PRESSURE PN (MPa)	NOMINAL DIAMETER DN	STRUCTURAL DIMENSIONS				FLANGE CONNECTION DIMENSIONS							HANDWHEEL D0	LIFT m	WEIGHT (kg)
		L (Type AS)	L (Type BS)	H	L2	D	D1	D2	b	n	Th.				Type AS	Type BS
1.6	40	260	200	235	115	115	150	110	88	18	4	4	M12	120	11	12	10
	50	280	230	258	125	125	165	125	102		4	4	M14	140	12	15	12
	65	335	290	301	145	145	185	145	122	18	4	4	M16	160	14	19	20
	80	360	310	325	155	155	200	160	133		4	8	M16	200	17	23	23
	100	427	350	378	175	175	220	180	158	20	8	8	M16	250	22	28	37
	125	465	400	405	200	200	250	210	184		8	8	M16	250	22	35	57
	150	524	480	452	225	225	285	240	212	22	8	12	M20	280	24	42	87
1.0	65	310	290	277	145	145	185	145	122	18	4	4	M16	160	12	19	20
	80	345	310	304	155	155	200	160	133		4	8	M16	180	14	23	26
	100	374	350	325	175	175	220	180	158	18	8	8	M16	200	17	28	37
	125	426	400	366	200	200	250	210	184		8	8	M16	220	20	35	57
	150	487	480	415	225	225	285	240	212	22	8	12	M20	250	22	42	90
0.6	200	600	600	524	275	275	320	280	258		12	12	M20	360	27	68	100
	250	743	730	612	325	325	375	335	312	18	12	12	M24	450	32	80	140

3.4 MARKING EXAMPLES

For a straight-through sea water stop check valve with nominal pressure 1.6 MPa, nominal diameter 40 mm, flange connection dimensions and sealing faces in accordance with GB 569:
STOP CHECK VALVE A04040 CB/T 3197-1995

For a straight-through sea water stop check valve with nominal pressure 1.0 MPa, nominal diameter 100 mm, flange connection dimensions and sealing faces in accordance with GB 2501:
STOP CHECK VALVE BS10100 CB/T 3197-1995

4. TECHNICAL REQUIREMENTS

4.1 GENERAL REQUIREMENTS

The technical requirements for stop check valves shall comply with GB 600.

4.2 MATERIALS

The main part materials for stop check valves shall be in accordance with Table 4.

TABLE 4 - MATERIALS FOR MAIN PARTS

PART NAME	MATERIAL NAME	GRADE	STANDARD NO.
Body, Bonnet	Cast Steel	ZG 230-450	CB 772-86
Disc	Cast Tin Bronze	ZQSn10-2	GB 883-83
Stem	Aluminum Bronze	QA19-2	GB 4429-84
Seat	Cast Tin Bronze	ZQSn10-2	GB 883-83

4.3 FLANGE AND STRUCTURAL LENGTH

The flange connection dimensions and sealing faces of stop check valves shall comply with GB 569 or GB 2501.
The structural length of Type AS and Type BS stop check valves shall comply with GB 11698.
The wall thickness of the stop check valve body shall comply with ZB/T U52 001.

5. TEST METHODS AND INSPECTION RULES

5.1 TEST METHODS

The test methods for stop check valves shall comply with GB 600.

5.2 INSPECTION RULES

The factory inspection items and requirements for stop check valves shall be in accordance with Table 5.

TABLE 5 - INSPECTION ITEMS

SERIAL NO.	ITEM	REQUIREMENTS
1	Determination of mechanical properties and chemical composition analysis of castings	Conform to CB 772
2	Visual inspection	Conform to GB 600
3	Strength test	Conform to GB 600
4	Sealing test	Conform to GB 600

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