High Quality Double Eccentric Flange Butterfly Valve

China High Quality Double Eccentric Flange Butterfly Valve, Find details about China Butterfly Valve, Angle Valve from High Quality Double Eccentric Flange Butterfly Valve

Basic Info.

Model NO.

D941X-2.5 6 10 16

Working Temperature

Normal Temperature (-40°C<T<120°C)

Material of Seal Surface

Soft Sealed

Valve Body

Casting

Application

Industrial Usage, Water Industrial Usage

Service

OEM/ODM

Shelf Life

18 Months

Trademark

Daisen

Transport Package

Poly Bag, Inner Box, Outer Carton /and Pallet

Specification

DN50-4000

Origin

China

HS Code

8481804090

Model NO.

D941X-2.5 6 10 16

Working Temperature

Normal Temperature (-40°C<T<120°C)

Material of Seal Surface

Soft Sealed

Valve Body

Casting

Application

Industrial Usage, Water Industrial Usage

Service

OEM/ODM

Shelf Life

18 Months

Trademark

Daisen

Transport Package

Poly Bag, Inner Box, Outer Carton /and Pallet

Specification

DN50-4000

Origin

China

HS Code

8481804090

Product Desciption

Double eccentric sealed butterfly valve

The rotation center of disc (namely the center of valve shaft) and thecenterline ofbody form up a 'b' eccentric on the base of single eccentric butterfly valve. Makingthe sealing face of disc disengaged from seat sealing face more quickly than singleeccentric seal butterfly valves during the process of open and close. Once disc turnsto8° -12°. the disc sealing face will be completely disengaged from the seat sealingface. Once fully opened, a gap 'Y' will be formed up between the two sealing faces.This type of butterfly Valves are designed to have greatly lowered the mechanicalwear and extrusion deformation between the two sealing faces, making the sealingperformance of butterfly valve much better.
The characteristic of this structure is to make stem axis not only deviated from thecenter of disc. But also the center of the body. The effect of double eccentric is that,when valve has been opened, disc can be quickly disengaged from seat, thus togreatly eliminate the unnecessary excessive extrusion and scratch between the discand seat, reduce opening resistance, lower the abrasion and improve the service lifeof seat. As scratch has been greatly lowered, metal seat can be used for double eccentricbutterfly valve, so that butterfly valves are able to be used in high temperature fields.However, as its seal is positioned sealing construction ,i.e. The sealing faces discand seat is lineal contact, disc extruding seat to produce elastic deformation, thusto effect the sealing performance especially seat to produce elastic position, especiallyfor those with metal seat, and is given poor pressure endurance. This is why butterfly valves are, conventionally, not resistant to high temperature and leakage.

High Quality Double Eccentric Flange Butterfly Valve

DN	L		H1	H2	H3	A1	A2		0.25MPa		0.6MPa		1.0MPa		1.6MPa
DN			H1	H2	H3	A1	A2		D1	n-d	D1	n-d	D1	n-d	D1	n-d
50	108	150	82.5	150	255	191	126	200	110	4-14	110	4-14	125	4-19	125	4-19
65	112	170	92.5	165	255	191	126	200	130	4-14	130	4-14	145	4-19	145	4-19
80	114	180	100	170	255	191	126	200	150	4-19	150	4-19	160	8-19	160	8-19
100	127	190	125	195	255	191	126	200	170	4-19	170	4-19	180	8-19	180	8-19
125	140	200	142	20	302	240	175	300	200	8-19	20	8-19	210	8-19	210	8-19
150	140	210	160	250	302	240	175	300	225	8-19	225	8-19	240	8-23	240	8-23
200	152	230	180	275	410	240	175	300	280	12-19	280	8-19	295	8-23	295	12-23
250	165	250	220	305	410	552	101	360	335	12-23	335	12-19	350	12-23	355	12-28
300	178	270	245	350	473	552	101	360	395	12-23	395	12-23	400	12-23	410	12-28
350	190	290	278	385	473	625	152	500	445	16-23	445	12-23	460	16-23	470	16-28
400	216	310	306	435	473	625	152	500	495	16-23	495	16-23	515	16-28	525	16-31
450	222	330	346	490	488	625	152	500	550	20-23	550	16-23	565	20-28	585	20-31
500	229	350	375	505	488	680	375	500	600	20-26	600	20-23	620	20-28	650	20-34
600	267	390	425	605	488	680	375	500	705	24-26	705	20-26	725	20-31	770	20-37
700	292	430	496	675	488	680	375	500	810	24-31	810	24-26	840	24-31950	840	24-37
800	318	470	560	740	550	412	757	300	920	24-31	920	24-31	950	24-34	950	24-40
900	330	510	625	805	550	412	757	300	1020	24-31	1020	24-31	1050	28-34	1050	28-40
1000	410	550	680	865	550	412	757	300	1120	28-31	1120	28-31	110	28-37	1170	28-43
1200	470	630	800	1065	600	452	830	400	1320	32-31	1340	32-34	1380	32-40	1390	32-49
1400	530	710	920	1207	670	452	830	400	1520	36-34	1560	36-37	159	36-43	1590	36-49
1600	600	790	1030	1317	680	475	943	305	1730	40-31	1760	40-37	1820	40-49	1820	40-56
1800	670	870	1275	1510	885	577	1021	458	1930	44-31	1970	44-40	2020	44-48	2020	44-56
2000	760	950	1408	1600	885	577	1021	458	2130	48-30	2180	48-43	2230	48-48	2230	48-62
2200	800	1000	1450	1740	915	750	1070	458	2340	52-33	2390	52-43	2440	52-56	2440	52-62
2400	850	1100	1675	1845	915	750	1070	458	2540	56-33	2600	56-43	2650	56-56	2650	56-62
2600	900	1200	1745	2010	1045	910	1192	500	2740	60-33	2810	60-48	2850	60-56	2850	60-62
2800	950	1300	1818	2100	1045	910	1192	500	2960	64-36	3020	64-48	3070	64-56	3070	64-70
3000	1000	1400	1910	2200	1190	1020	1310	500	3160	68-36	3220	68-48	3290	68-62	3300	68-70
3200	1100		2050	2450	1190	1190	1020	1310	3360	72-36	3430	72-48	3520	72-62	3530	72-70
3400	1200		2200	2600	1340	1340	1170	1480	3560	76-36	3640	76-48	3730	76-62	3760	76-70
3600	1200		2350	2800	1340	1340	1170	1480	3770	80-36	3860	80-56	3950	80-62	4000	80-70
3800	1200		2500	3000	1560	156	1320	1670	3970	80-39	4080	80-56	4170	80-62	4240	80-78
4000	1300		2600	3150	1560	1560	1320	1670	4170	84-39	4300	84-56	4400	84-70	4480	84-78