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DN2000 Double eccentric butterfly valve

Features: Size: DN150-DN3200
Pressure Rating: PN16/PN25
Material: Ductile Iron
Design Standard: DIN3352 F4, LIGHT TYPE
Inspection Standard: EN12266
Application medium: Drinking water, sewage, seawater, irrigation or other neutral liquid
Application Temperature: -40°C～150°C

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Brief introduction of double eccentric butterfly valve:

D342X, D942X, D342Xs, and D942Xs type rubber sealed butterfly valve adopts double eccentric structure, absorbs the structure and characteristics of similar foreign products, overcomes the defects in the use of the original product, and makes its life more durable and more reliable sealing. Double eccentric butterfly valve is suitable for various pipelines, specially installed in the outlet of the circulating water pump, for cutting off or regulating the flow of the medium, and can inhibit the impact effect produced when the pump starts and stops, without being affected by the flow direction of the medium.

DN	Main ouler size					Main connection size
	Main ouler size					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	825	306	80	80	140	110	88	4-14	165	125	99	4-18	165	125	99	4-18
65	112	925	321	80	80	160	130	108	4-14	195	145	118	4-18	185	145	118	4-18
80	114	100	346	80	80	190	150	124	4-18	200	160	132	8-18	200	160	132	8-18
100	127	110	37	95	95	210	170	144	4-18	220	180	156	8-18	220	180	156	8-18
125	140	125	411	95	95	240	200	174	8-18	250	210	184	8-18	250	210	184	8-18
150	140	1425	447	95	95	265	225	199	8-18	285	240	211	8-22	2B5	240	211	8-2
200	152	170	607	190	300	320	280	254	8-18	340	295	266	8-22	340	296	266	12-22
260	165	1925	688	190	308	376	335	309	12-18	396	350	319	12-22	405	355	319	12-26
300	178	2225	742	190	308	440	395	363	12-22	445	400	370	12-22	480	410	370	12-26
350	190	2525	797	190	30B	490	445	413	12-22	505	460	429	16-22	520	470	429	16-26
400	216	2825	930	270	486	540	495	463	16-22	565	515	480	16-26	580	525	480	16-30
450	222	3075	975	270	486	566	550	518	16-22	615	565	530	20-26	640	585	548	20-30
500	229	335	1065	270	486	645	600	568	20-22	670	620	6R2	20-26	715	650	609	20-33
600	267	390	1225	457	625	755	705	667	20-26	780	725	682	20-30	840	770	720	20-36
700	292	4475	1343	457	625	860	810	772	24-26	895	840	794	24-30	910	840	794	24-36
800	318	5075	1436	457	625	975	920	878	24-30	1015	950	901	24-33	1025	950	901	24-39
900	330	5575	1616	598	853	1075	1020	978	24-30	115	1050	1001	28-33	1125	1050	1001	28-39
1000	410	615	1711	598	853	1175	1120	1078	28-30	1230	1160	1112	28-36	1255	1170	112	28-42
1200	470	7275	1971	598	853	1405	1340	1295	32-33	1455	1380	1328	32-39	1485	1380	1328	32-48
1400	530	8375	2218	860	1345	1630	1560	1510	36-36	1675	1590	1530	36 -42	16865	1590	1530	36-48
1600	600	957.5	2578	880	1345	1800	1760	1710	40-36	1915	1820	1750	40-48	1990	1820	1760	40-56
1800	670	1067.5	2689	880	1345	2045	1970	1918	44-39	2115	2020	1950	4448	2130	2020	1960	44-56
2000	760	1162.5	3022	952	1592	2265	2180	2125	48-42	2325	2230	2150	48-48	2345	2230	2150	48-82

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1.WESDOM patent products, patent certification

The product side flanges comply with national, German, Russian, American, British and Japanese standards and other domestic and international standards for multiple pressures, easy connection and wide adaptability, which can reduce the type of purchase and stock.

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6. WESDOM has a strict quality control system

WESDOM has a strict quality control system and before delivery, we test 100% of each product to ensure its quality, promising you a high quality product.

Quality Control Process

Standards&Features:

Advantages of double eccentric butterfly valve:

Small valve opening and closing torque

Due to the existence of eccentricity, when the valve is closed, the sealing surface is a gradual entry and exit process, thus reducing the mechanical wear and extrusion between the sealing surfaces.

The sealing ratio pressure can be adjusted

When the valve is used for a period of time or loosened during transportation, it can be pressed to ensure the sealing requirements.

Sealing ring can be replaced on site

The rubber sealing ring is mounted on the butterfly plate and can be replaced in-line.

Long service life

The seal ring and the valve seat contact is anastomosis seal, there is no mechanical wear and extrusion, so the seal ring of double eccentric butterfly valve has a longer service life.

Using conditions

Suitable for large installations and pipelines in drainage, heating, and gas systems as well as chemical power generation and metallurgy industries.

Double eccentric design principle and features:

This butterfly valve is a double eccentric soft seal structure, i.e. the eccentric distance from the centre of rotation of the butterfly plate to the sealing section of the valve body a, and the distance from the centre of rotation of the butterfly plate to the centre line of the valve body b, (see figure below). This valve is decelerated by worm gear transmission (electric valve is decelerated by electric motor through worm gear transmission), and the butterfly plate is driven to rotate within 90℃ by the valve shaft, so that the butterfly plate is in the open or closed state to achieve the purpose of connecting or cutting off the medium.

As shown in the diagram, when the valve is closed, the sealing ring is extruded by the sealing surface of the valve body and the butterfly plate, resulting in deformation, so that the sealing force between the sealing surfaces of the valve gradually reaches its maximum value.

Features of double eccentric butterfly valve:

①With two-way sealing performance, especially suitable for media with both positive flow requirements and reverse flow requirements of the working conditions (need to be specified when ordering);

②Adopting double eccentric sealing structure, it has the function of getting tighter and tighter when closing, with reliable sealing performance;

③The butterfly plate adopts streamlined structure, high strength, large circulation area, and small flow resistance;

④Change the material of the valve body, the sealing ring is located on the butterfly plate, change the sealing ring material, which can be applied to different media;

⑤The worm wheel drive device is fully enclosed type, flexible operation;

⑥The electric device is an integrated product of the introduced type, which can be controlled locally or remotely, with safe and reliable control.

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