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First,large diameter metal seal butterfly valve Description:
D343H, D343Y, D341H PN6 ~ PN40 multi-level hard-seal butterfly valve installed in the petroleum, chemical, food, medicine, textile, paper, water and electricity, ships, water supply and drainage, smelting and other systems , In all water, gas, oil, semi-fluid and solid powder pipelines and containers used as regulation and closure, can be installed in any horizontal or vertical pipelines. D343H Turbine metal hard sealing butterfly valve than the soft rubber sealing butterfly valve to help long life, the valve is usually carbon steel or stainless steel.

Second, large diameter metal seal butterfly valve main performance parameters:

Nominal diameter		DN 50 ~ 2000mm
Nominal pressure		0.6MPa	1.0MPa	1.6MPa	2.5MPa	4.0MPa
Test pressure PsMPa	Strength test	0.9	1.5	2.4	3.75	6.0
	Seal test	0.66	1.1	1.76	2.75	4.4
	Gas seal test	0.5 ~ 0.8 MPa
Suitable media	Water, oil, steam, gas, acid, alkali and so on
proper temperature	-40 ℃ ~ 570 ℃

Third, large diameter metal seal butterfly valve main shape and connection dimensions:

D343H-10C, D343Y-10C, D341H-10C Worm Flanged Hard Sealing Butterfly Valve Connection Size:

The way to		Main dimensions			0.25MPa				0.6MPa				1.0M Pa
mm	inch	L	H	H 1	D	D 1	Z-φd	b × f	D	D1	Z-φd	b × f	D	D1	Z-φ d	b × f
50	2	108	75	200	140	110	4-φ14	16 × 3	140	110	4-φ14	16 × 3	165	125	4-φ18	20 × 3
65	2-1 / 2	112	93	210	160	130	4-φ14	16 × 3	160	130	4-φ14	16 × 3	185	145	4-φ18	20 × 3
80	3	114	98	226	190	150	4-φ18	18 × 3	190	150	4-φ18	18 × 3	200	160	8-φ18	20 × 3
100	4	127	130	250	210	170	4-φ18	18 × 3	210	170	4-φ18	18 × 3	220	180	8-φ18	22 × 3
125	5	140	165	295	240	200	8-φ18	20 × 3	240	200	8-φ18	20 × 3	250	210	8-φ18	22 × 3
150	6	140	175	315	260	225	8-φ18	20 × 3	265	225	8-φ18	20 × 3	285	240	8-φ22	24 × 3
200	8	152	220	380	320	280	8-φ18	22 × 3	320	280	8-φ18	22 × 3	340	295	8-φ22	24 × 3
250	10	165	250	405	375	335	12-φ18	24 × 3	375	335	12-φ18	24 × 3	395	350	12-φ22	26 × 3
300	12	178	300	480	440	395	12-φ22	24 × 4	440	395	12-φ22	24 × 4	445	400	12-φ22	26 × 4
350	14	190	330	545	490	445	12-φ22	24 × 4	490	445	12-φ22	24 × 4	505	460	16-φ22	26 × 4
400	16	216	360	550	540	495	16-φ22	24 × 4	540	495	16-φ22	24 × 4	565	515	16-φ26	26 × 4
450	18	222	380	620	595	550	16-φ22	24 × 4	595	550	16-φ22	24 × 4	615	565	20-φ26	28 × 4
500	20	229	410	680	645	600	20-φ22	26 × 4	645	600	20-φ22	26 × 4	670	620	20-φ26	28 × 4
600	24	267	460	750	755	705	20-φ26	26 × 5	755	705	20-φ26	26 × 5	780	725	20-φ30	30 × 4
700	28	292	530	820	860	810	24-φ26	26 × 5	860	810	24-φ26	26 × 5	895	840	24-φ30	30 × 5
800	32	318	610	910	975	920	24-φ30	26 × 5	975	920	24-φ30	26 × 5	1015	950	24-φ33	32 × 5
900	36	330	640	930	1075	1020	24-φ30	26 × 5	1075	1020	24-φ30	26 × 5	1115	1050	28-φ33	34 × 5
1000	40	410	720	980	1175	1120	28-φ30	26 × 5	1175	1120	28-φ30	26 × 5	1230	1160	28-φ36	34 × 5
1200	48	470	820	1220	1375	1320	32-φ30	26 × 5	1405	1340	32-φ33	28 × 5	1455	1380	32-φ39	38 × 5
1400	56	530	930	1310	1575	1520	36-φ30	26 × 5	1630	1560	36-φ36	32 × 5	1675	1590	36-φ42	42 × 5
1600	64	600	80	1460					1830	1760	40-φ36		1915	1820	40-φ48	62 × 5
1800	72	670	1090	1560					2045	1970	44-φ39		2115	2020	44-φ48
2000	80	760	1190	1670					2265	2 1 80	48-φ42		2325	2230	48-φ48

D343H-16C, D343Y-16C, D341H-16C Worm Flanged Hard Sealing Butterfly Valve Connection Size:

2.5Mpa pressure models are: D343H-25C, D343Y-25C, D341H-25C; 4.0Mpa pressure models are: D343H-40C, D343Y-40C, D341H-40C

The way to		Main dimensions			1.6M Pa				2.5MPa				4.0MPa
mm	inc h	L	H	H 1	D	D 1	Z-φd	b × f	D	D 1	Z-φd	b × f	D	D1	Z-φd	b × f
50	2	108	75	200	165	125	4-φ18	20 × 3	165	125	4-φ18	20 × 3	165	125	4-φ18	20 × 3
65	2-1 / 2	112	93	210	185	145	4-φ18	20 × 3	185	145	8-φ18	22 × 3	185	145	8-φ18	22 × 3
80	3	114	98	226	200	160	8-φ18	20 × 3	200	160	8-φ18	4 × 3	200	160	8-φ18	24 × 3
100	4	127	130	250	220	180	8-φ18	22 × 3	235	190	8-φ22	24 × 3	235	190	8-φ22	24 × 3
125	5	140	165	295	250	210	8-φ18	22 × 3	270	220	8-φ26	26 × 3	270	220	8-φ26	26 × 3
150	6	140	175	315	285	240	8-φ22	24 × 3	300	250	8-φ26	28 × 3	300	250	8-φ26	28 × 3
200	8	152	220	380	340	295	12-φ22	24 × 3	360	310	12-φ26	30 × 3	375	320	12-φ30	34 × 3
250	10	165	250	405	405	355	12-φ26	26 × 3	425	370	12-φ30	32 × 3	450	385	12-φ33	38 × 3
300	12	178	300	480	460	410	12-φ26	28 × 3	485	430	16-φ30	34 × 4	515	450	12-φ33	42 × 4
350	14	190	330	545	520	470	16-φ26	30 × 4	555	490	16-φ33	38 × 4	580	510	16-φ36	46 × 4
400	16	216	360	550	580	525	16-φ30	32 × 4	620	550	16-φ36	40 × 4	660	585	16-φ39	50 × 4
450	18	222	380	620	640	585	20-φ30	34 × 4	670	600,	20-φ36	42 × 4	685	610	20-φ39	50 × 4
500	20	229	410	680	715	650	20-φ33	36 × 4	730	660	20-φ36	44 × 4	755	670	20-φ42	52 × 4
600	24	267	460	750	840	770	20-φ36	38 × 5	845	770	20-φ39	46 × 5	890	795	20-φ48	60 × 5
700	28	292	530	820	910	840	24-φ36	38 × 5	960	875	24-φ42	46 × 5
800	32	318	610	910	1025	950	24-φ39	38 × 5	1085	990	24-φ48	50 × 5
900	36	330	640	930	1125	1050	28-φ39	40 × 5	1185	1 090	28-φ48	54 × 5
1000	40	410	720	980	1255	1170	28-φ42	42 × 5	1320	1210	28-φ56	58 × 5
1200	48	470	820	1220	1485	1390	32-φ48	48 × 5	1530	1420	32-φ56	72 × 5
1400	56	530	930	1310	1685	1590	36-φ48	60 × 5	1750	1640	36-φ65	78 × 5
1600	64	600	980	1460	1930	1820	40-φ56
1800	72	670	1090	1560	2130	2020	44-φ56
2000	80	760	1190	1670	2345	2230	48-φ62

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The previous：Large diameter metal seal butterfly valve