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GB Piston-lift Type Check Valve


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Standards

Design and manufacture as GB/T12235

Face to face dimensions as GB/T12221
End flange dimension as JB/T79
Pressure test as JB/T9092

Test Pressure

Test Item		Shell Test	Seal Test	Back Seal Test	Air Seal Test
Medium		Water			Air
Unit		MPa	MPa	MPa	MPa
Nominal Pressure PN(MPa)	1.6	2.4	1.8	1.8	0.5~0.7
	2.5	3.8	2.8	2.8
	4.0	6.0	4.4	4.4
	6.4	9.6	7.0	7.0
	10.0	15.0	11.0	11.0
	16.0	24.0	18.0	18.0

Materials for Main Parts

Name	Material
Body/Bonnet	CF8	CF3	CF8M	CF3M	WCB	LCB	WC6	WC9	C5
Wedge	CF8	CF3	CF8M	CF3M	WCB	LCB	WC6	WC9	C5
Gasket	PTFF				Graphite
Bolt	Stainless Steel				35CrMoA
Nut	Stainless Steel				45、35CrMoA

Main Connection Dimensions

Type	DN(mm)	Dimension(mm)
Type	DN(mm)	L	D	D1	D2	D6	b-f	f1	z- Φd	H
H H41W-16 Y	15	130	95	65		45	14-2		4- Φ14	90
	20	150	105	75		55	14-2		4-Φ14	105
	25	160	115	85		65	14-2		4- Φ14	115
	32	180	135	100		78	16-2		4- Φ18	120
	40	200	145	110		85	16-3		4- Φ18	130
	50	230	160	125		100	16-3		4- Φ18	140
	65	290	180	145		120	18-3		4- Φ18	150
	80	310	195	160		135	20-3		8- Φ18	170
	100	350	215	180		155	20-3		8- Φ18	185
	125	400	245	210		185	22-3		8- Φ18	195
	150	480	280	240		210	24-3		8- Φ23	225
	200	600	335	295		265	26-3		12- Φ23	250
	250	650	405	355		320	30-3		12- Φ25	270
	300	750	460	410		375	30-3		12- Φ25	300
H H41W-25 Y	15	130	95	65		45	16-2		4-Φ14	90
	20	150	105	75		55	16-2		4-Φ14	105
	25	160	115	85		65	16-2		4-Φ14	115
	32	180	135	100		78	18-2		4- Φ18	120
	40	200	145	110		85	18-3		4- Φ18	130
	50	230	160	125		100	20-3		4- Φ18	140
	65	290	180	145		120	22-3		8- Φ18	150
	80	310	195	160		135	22-3		8- Φ18	170
	100	350	230	190		160	24-3		8- Φ23	185
	125	400	270	220		188	28-3		8- Φ25	195
	150	480	300	250		218	30-3		8- Φ25	225
	200	600	360	310		278	34-3		12- Φ25	250
	250	650	425	370		335	36-3		12- Φ30	270
	300	750	485	430		390	40-4		16- Φ30	300
H H41W-40 Y	25	160	115	85	65	58	16-2	4	4- Φ14	115
	32	180	135	100	78	66	18-2	4	4- Φ18	120
	40	200	145	110	85	76	18-3	4	4- Φ18	130
	50	230	160	125	100	88	20-3	4	4- Φ18	140
	65	290	180	145	120	110	22-3	4	8- Φ18	150
	80	310	495	160	135	121	22-3	4	8- Φ18	170
	100	350	230	190	160	150	24-3	4.5	8- Φ23	185
	125	400	270	220	188	176	28-3	4.5	8- Φ25	195
	150	480	300	250	218	204	30-3	4.5	8- Φ25	225
	200	600	375	320	282	260	38-3	4.5	12- Φ30	250
H H41W-64 Y	15	170	105	75	55	40	18-2	4	4- Φ14	110
	20	190	125	90	68	51	20-2	4	4- Φ18	125
	25	210	135	100	78	58	22-2	4	4- Φ18	152
	32	230	150	110	82	66	24-2	4	4- Φ23	168
	40	260	165	125	95	76	24-3	4	4- Φ23	170
	50	300	175	135	105	88	26-3	4	4- Φ23	188
	65	340	200	160	130	110	28-3	4	8- Φ23	205
	80	380	210	170	140	121	30-3	4	8- Φ23	230
	100	430	250	200	168	150	32-3	4.5	8- Φ25	280
	125	500	295	240	202	176	36-3	4.5	8- Φ30	300
	150	550	340	280	240	204	38-3	4.5	8- Φ34	350
	200	650	405	345	300	260	44-3	4.5	12- Φ34	400