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National standard vertical check valve

Vertical check valve refers to the valve that automatically opens and closes the valve flap by relying on the flow of the medium itself to prevent the backflow of the medium, also known as check valve, one-way valve, reverse flow valve, and back pressure

Product Parameter

Main external dimensions and connection dimensions:

National standard (GB) PN1.6MPa
DN	L	D	D1	D2	b	Z-фd
15	85	95	65	45	14	4-ф14
20	95	105	75	55	14	4-ф14
25	105	115	85	65	14	4-ф14
32	150	135	100	78	16	4-ф18
40	160	145	110	85	16	4-ф18
50	170	160	125	100	16	4-ф18
65	180	180	145	120	18	4-ф18
80	200	195	160	135	20	8-ф18
100	210	215	180	155	20	8-ф18
125	275	245	210	185	22	8-ф18
150	300	280	240	210	24	8-ф23
200	380	335	295	265	26	12-ф23
250	400	405	355	320	30	12-ф25
300	420	460	410	375	30	12-ф25
350	450	520	470	435	34	16-ф25
National standard (GB) PN2.5MPa
DN	L	D	D1	D2	b	Z-фd
15	85	95	65	45	16	4-ф14
20	95	105	75	55	16	4-ф14
25	105	115	85	65	16	4-ф14
32	150	135	100	78	16	4-ф18
40	160	145	110	85	18	4-ф18
50	170	160	125	100	20	4-ф18
65	180	180	145	120	22	4-ф18
80	200	195	160	135	22	8-ф18
100	210	230	190	160	24	8-ф23
125	275	275	220	188	28	8-ф25
150	300	300	250	218	30	8-ф25
200	380	360	310	278	34	12-ф25
250	400	425	370	332	36	12-ф30
300	420	485	430	390	40	16-ф30
350	450	550	490	448	44	16-ф34
400	480	610	550	505	48	16-ф34
450	550	660	600	555	50	20-ф34
500	600	730	660	610	52	20-ф41
National standard (GB) PN4.0MPa
DN	L	D	D1	D2	b	Z-фd
15	85	95	65	45	16	4-ф14
20	95	105	75	55	16	4-ф14
25	105	115	85	65	16	4-ф14
32	150	135	100	78	16	4-ф18
40	160	145	110	88	18	4-ф18
50	170	160	125	100	20	4-ф18
65	180	180	145	120	22	4-ф18
80	200	195	160	135	22	8-ф18
100	210	230	190	160	24	8-ф23
125	275	275	220	188	28	8-ф25
150	300	300	250	218	30	8-ф25
200	380	375	320	282	38	12-ф30