Ductile Iron Double Eccentric Butterfly Valve

ADVANTAGES

Double eccentric butterfly valve is mainly used for drainage of water plants, power plants, steel smelting, chemical industry, water source engineering, environmental facility construction, etc., especially suitable for water pipelines, as regulating and intercepting equipment. Compared with the centerline butterfly valve, the double eccentric butterfly valve is more resistant to high pressure, has a longer life and good stability. Compared with other valves, the larger the caliber, the lighter the material, and the lower the cost.
The structural feature of the double eccentric butterfly valve is that the shaft center of the valve stem deviates from the center of the butterfly plate and the center of the body. The double eccentric effect enables the butterfly plate to be released from the valve seat immediately after the valve is opened, which greatly eliminates unnecessary excessive extrusion and scratching of the butterfly plate and the valve seat, reduces the opening resistance, reduces wear and improves The life of the valve seat is improved. The scraping is greatly reduced, and at the same time, the double eccentric butterfly valve can also use a metal seat, which improves the application of the butterfly valve in the high temperature field.

Features:
Applicable medium：Water, gas, oil, etc
Suitable temperature：0℃～80℃
Application field：Water treatment, municipal construction, drainage, power plants, etc.

Product advantages:
1. The body material is QT450 or WCB, and the chemical composition and mechanical properties meet the requirements of national standards. Material reports can be provided.

2. The valve body and inner parts are processed by CNC precision machine with high precision.

3. Adopt body sealing structure, which is different from the conventional plate sealing structure in the market, and can realize two-way sealing.

4. There are rubber soft seals and stainless steel hard seals available. The valve plate and other parts can also be selected according to the working conditions.

5. The valve seat is welded with stainless steel, which is more wear-resistant and has a longer service life.

6. The valve shaft is supported by self-lubricating sleeve bearings, which can reduce the friction produced during valve shaft transmission and reduce torque.

7. The world-famous brand Aksu epoxy resin spraying is used, and the spraying thickness is 250um.

8. Each valve must be tested in accordance with national standards when leaving the factory, and unqualified products will never

PARAMETER INFORMATION

1. Executive standard：

Name	Design and manufacture	Face to face Length	End Flange	Pressure Test
Reference Standard	GB/T 12238	GB/T 12221	GB/T 17241.6	GB/T 13927

2. Material of Main Parts:

Name	5-Body	7-Disc	6-Stem	10-Disc Sealing	11-Body Sealing
Material	QT450-10	QT450-10	2Cr13	NBR	304

3.Dimensions：

Size			PN10		PN16
DN	NPT	L	D2	n-d	D2	n-d
100	4"	127	180	8-φ19	180	8-φ19
125	5"	140	210	8-φ19	210	8-φ19
150	6''	140	240	8-φ22	240	8-φ22
200	8''	152	295	8-φ22	295	12-φ22
250	10''	165	350	12-φ22	355	12-φ28
300	12''	178	400	12-φ22	410	12-φ28
350	14''	190	460	16-φ22	470	16-φ28
400	16''	216	515	16-φ28	525	16-φ31
450	18''	222	565	20-φ28	585	20-φ31
500	20''	229	620	20-φ28	650	20-φ24
600	24''	267	725	20-φ31	770	20-φ37
700	28''	292	840	24-φ31	840	24-φ37
800	32''	318	950	24-φ34	950	24-φ40
900	36''	330	1050	28-φ34	1050	28-φ40
1000	40''	410	1160	28-φ37	1170	28-φ43
1200	48''	470	1380	32-φ40	1390	32-φ49
1400	56''	530	1590	36-φ43	1590	36-φ49
1600	64''	600	1820	40-φ49	1820	40-φ56
1800	72''	670	2020	44-φ49	2020	44-φ56
2000	80''	760	2230	48-φ49	2230	48-φ62
2200	88''	800	/
2400	96''	850
2600	104''	900
2800	112''	950
3000	120''	1000