Home Product Butterfly Valve Series

Product Classification

Control Valve Series Ball Valve Series Butterfly Valve Series Gate Valve Series Globe Valve Series Check Valve Series Water Control Valve Series Filter Series Steam Trap Series

Three eccentric flanged butterfly valve (pneumatic)

Technical Specifications

Product model: D643H/W/Y
Nominal diameter: DN50 - 3000mm
Pressure range: 0.6 - 6.4 MPa
Operating temperature: Carbon steel: -29℃ to 400℃, Stainless steel: -40℃ to 600℃
Applicable media: air, water, sewage, steam, gas, oil products, etc.

Sales Hotline：

0086-21-59110018

Product Details

Product structural characteristics

The three eccentric butterfly valve changes the positive cone angle to a slanted cone angle. This reduces the eccentricity between the valve stem and the valve body center, and consequently reduces the opening torque. It is widely used in industrial pipelines such as metallurgy, power, petrochemicals, water supply and drainage, and municipal construction, for regulating flow and controlling fluid.

Its main structural features are

1. The butterfly plate and the sealing surface have no friction during opening and closing, and it is a forced seal.
2. Can be installed at any position;
3. Zero-leakage structural design;
4. You can choose between metal and non-metal, as well as metal and metal sealing methods.
5. Customers can choose from one-way valves and two-way valves.
6. Optional dynamic load type packing;
7. Optional low-leakage packing to meet the requirements of ISO 15848;
8. The valve stem can be designed to be longer.
9. We can design low-temperature valves or ultra-low temperature valves according to customer requirements.

Main external connection dimensions

DN （mm）	Main external connection dimensions					Flange dimensions and bolt hole dimensions
	L	H	H1	A	B	0.6MPa				1.0MPa				1.6MPa
	L	H	H1	A	B	D	D1	D2	n-d	D	D1	D2	n-d	D	D1	D2	n-d
50	108	82.5	338	180	65	140	110	88	4-14	185	125	99	4-18	165	125	99	4-18
65	112	92.5	358	180	65	160	130	108	4-14	185	145	118	4-18	185	145	118	4-18
80	114	100	413	245	72	190	150	124	4-18	200	160	132	8-18	200	160	132	8-18
100	127	110	428	240	72	210	170	144	4-18	220	180	156	8-18	220	180	156	8-18
125	140	125	444	240	72	240	20	174	8-18	250	210	184	8-18	250	210	184	8-18
150	140	142.5	553	350	93	265	225	199	8-18	285	240	211	8-22	285	240	211	8-22
200	152	170	678	350	93	320	280	254	8-18	340	295	266	8-22	340	295	266	12-22
250	165	192.5	742	550	350	375	335	309	12-18	395	350	319	12-22	405	355	319	12-26
300	178	222.5	803	600	350	440	395	363	12-22	445	400	370	12-22	460	410	370	12-26
350	190	252.5	866	600	350	490	445	413	12-22	505	460	429	16-22	520	470	429	16-26
400	216	282.5	940	600	350	540	495	463	16-22	565	515	480	16-26	580	525	480	16-30
450	222	307.5	995	750	380	595	550	518	16-22	615	565	530	20-26	640	585	548	20-30
500	229	335	1058	750	380	645	600	568	20-22	670	620	582	20-26	715	650	609	20-33
600	267	390	1163	750	380	755	705	667	20-26	780	725	682	20-30	840	770	720	20-36
700	292	447.5	1283	750	380	860	810	772	24-26	895	840	794	24-30	910	840	794	24-36
800	318	507.5	1398	750	380	975	920	878	24-30	1015	950	901	24-33	1025	950	901	24-39
900	330	557.5	1498	1250	380	1075	1020	978	24-30	1115	1050	1001	28-33	1125	1050	1001	28-39
1000	410	615	1608	1500	580	1175	1120	1078	28-30	1230	1160	1112	28-36	1255	1170	1112	28-42
1200	470	727.5	1876	1500	580	1405	1340	1295	32-33	1455	1380	1328	32-39	1485	1390	1328	32-48