Double-Flange Double-Eccentric Butterfly Valve with Pneumatic/Electric Actuator

• Customization: Available
• Media: Air, Water, Sea Water, Sewage, Gas, Oil, etc.
• Driving Mode: Worm Gear/Pneumatic/Hydraulic/Electric
• Connection Form: Flange
• Structure: Double-Eccentric Sealing
• Seal Form: Supercharging Pressured Sealed
• Valve Stem: Normal
• Work Pressure: Pn6/10/16/25/40 MPa 150/300 Class
• Working Temperature: Normal Temperature (-40°C<T<120°C)
• Material of Seal Surface: Soft Sealed
• Valve Body: Casting
• Standard: ANSI/BS/DIN/JIS
• Application: Industrial Usage, Water Industrial Usage, Household Usage
• Body Materials: Ductile Iron/Carbon Steel/Stainless Steel/Duplex S
• Disc Materials: NBR/EPDM/PTFE
• Seat Materials: EPDM/PTFE
• Stem Materials: Austenitic Ss/Martensitic Ss/Duplex Ss/Super Duple
• Transport Package: Standard Export Wooden Carton
• Specification: DN50-DN4000
• Trademark: Yuming/OEM/ODM
• Origin: Zhengzhou, China
• HS Code: 8481804090
• Production Capacity: 10000PCS/Month
• Package Size: 100.00cm * 100.00cm * 100.00cm
• Package Gross Weight: 45.000kg

Product Description

Product Description

Advantages of double eccentric butterfly valve
(1). Valve opening and closing torque is small
Due to the existence of eccentricity, when the valve is closed, the sealing surface is a process of gradually entering and exiting, thus reducing the mechanical wear and extrusion between the sealing surfaces.
(2). Sealing specific pressure can be adjusted
When the valve is used for a period of time or loosened during transportation, it can be pressurized to ensure the sealing requirements.
(3). Seals are field replaceable
The rubber sealing ring is installed on the butterfly plate and can be replaced online.
(4). long lasting
The contact between the sealing ring and the valve seat is a coincident seal, and there is no mechanical wear and extrusion, so the sealing ring of the double eccentric butterfly valve has a long service life.
(5). Conditions of Use
It is suitable for large-scale installations and pipelines in drainage, heating, gas systems, chemical power generation, metallurgy and other industries.
(6). With two-way sealing performance With two-way
Sealing performance, especially suitable for working conditions where the medium requires both forward flow and reverse flow (please specify when ordering).
Double eccentric design principle and characteristics
The butterfly valve has a double eccentric soft seal structure, that is, the eccentric distance from the center of rotation of the butterfly plate to the sealing section a of the valve body, and the distance from the center of rotation of the butterfly plate to the center line of the valve body b, (see the figure below). The valve adopts worm gear transmission deceleration (electric valve is decelerated by motor through worm gear transmission), and the valve shaft drives the butterfly plate to rotate within 90°C, 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 figure, when the valve is closed, the sealing ring is squeezed by the sealing surface of the valve body and the butterfly plate, resulting in deformation.

Features of double eccentric butterfly valve:
(1) It has two-way sealing performance, especially suitable for the working conditions where the medium has both forward flow requirements and reverse flow requirements (please specify when ordering);
(2) Double eccentric sealing structure is adopted, which has the function of getting tighter and tighter when closing, and the sealing performance is reliable.
(3) The butterfly plate adopts a streamlined structure with high strength, large flow area and small flow resistance;
(4) Change the material of the valve body, the sealing ring is located on the butterfly plate, and the material of the sealing ring can be changed to apply to different media;
(5) The worm gear drive is fully enclosed and flexible in operation.
(6) The electrical device is an imported integrated product, which can be controlled locally or remotely, and the control is safe and reliable.
 

Soft Seal Butterfly Valve - Disc Seal

Soft Seal Butterfly Valve - Body Seal

Hard Seal Butterfly Valve

Product Parameters

Size		Outline dimensions				Flange dimensions EN1092-2
DN		L		H1	H2	PN6				PN10				PN16
Inch	mm	Series13	Series14			D	K	b	n-Φd	D	K	b	n-Φd	D	K	b	n-Φd
2	50	108	150	83	306	140	110	16	4-14	165	125	19	4-19	165	125	19	4-19
2-1/2	65	112	170	93	321	160	130	16	4-14	185	145	19	4-19	185	145	19	4-19
3	80	114	180	100	346	190	150	18	4-19	200	160	19	8-19	200	160	19	4-19
4	100	127	190	110	387	210	170	18	4-19	220	180	19	8-19	220	180	19	8-19
5	125	140	200	125	411	240	200	20	8-19	250	210	19	8-19	250	210	19	8-19
6	150	140	210	143	447	265	225	20	8-19	285	240	19	8-23	285	240	19	8-23
8	200	152	230	170	607	320	280	22	8-19	340	295	20	8-23	340	295	20	12-23
10	250	165	250	193	688	375	335	24	12-19	395	350	22	12-23	405	355	22	12-28
12	300	178	270	223	742	440	395	24	12-23	445	400	24.5	12-23	460	410	24.5	12-28
14	350	190	290	253	797	490	445	26	12-23	505	460	24.5	16-23	520	470	26.5	16-28
16	400	216	310	283	930	540	495	28	16-23	565	515	24.5	16-28	580	525	28	16-31
18	450	222	330	308	975	595	550	28	16-23	615	565	25.5	20-28	640	585	30	20-31
20	500	229	350	335	1065	645	600	30	20-23	670	620	26.5	20-28	715	650	31.5	20-34
24	600	267	390	390	1225	755	705	30	20-26	780	725	30	20-31	840	770	36	20-37
28	700	292	430	448	1343	860	810	32	24-26	895	840	32.5	24-31	910	840	39.5	24-37
32	800	318	470	508	1463	975	920	34	24-31	1015	950	35	24-34	1025	950	43	24-40
36	900	330	510	558	1616	1075	1020	36	24-31	1115	1050	37.5	28-34	1125	1050	46.5	28-40
40	1000	410	550	615	1711	1175	1120	36	28-31	1230	1160	40	28-37	1255	1170	50	28-43
48	1200	470	630	728	1971	1405	1340	40	32-34	1455	1380	45	32-40	1485	1390	57	32-49
56	1400	530	710	838	2218	1630	1560	44	36-37	1675	1590	46	36-43	1685	1590	60	36-49
64	1600	600	790	958	2578	1830	1760	48	40-37	1915	1820	49	40-49	1930	1820	65	40-56
72	1800	670	870	1058	2689	2045	1970	50	44-40	2115	2020	52	44-49	2130	2020	70	44-56
80	2000	760	950	1163	3022	2265	2180	54	48-43	2325	2230	55	48-49	2345	2230	75	48-62
88	2200	800	1000	1163	3022	2265	2180	54	48-43	2325	2230	55	48-49	2345	2230	75	48-62
96	2400	850	1100	1163	3022	2265	2180	54	48-43	2325	2230	55	48-49	2345	2230	75	48-62
104	2600	900	1200	1163	3022	2265	2180	54	48-43	2325	2230	55	48-49	2345	2230	75	48-62
112	2800	950	1300	1163	3022	2265	2180	54	48-43	2325	2230	55	48-49	2345	2230	75	48-62
120	3000	1000	1400	1163	3022	2265	2180	54	48-43	2325	2230	55	48-49	2345	2230	75	48-62

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Company Profile

Yuming Valve Group Co., Ltd. was found in 1972, covering an area of 82000 square meters industrial park, which was constructed 38000 square meters.
Yuming Valve Group Co., Ltd., a leading industrial valve manufacturing enterprise, is renowned for its exceptional product quality and top-notch customer service. Since its establishment in 1972, we have continually expanded and evolved into a sizable organization with over 700 employees, including more than 80 technical professionals.

We specialize in the research, manufacturing, testing, and sales of valves. Our core product is the ball valve, and in addition, we offer a range of other valve types, including safety valves, butterfly valves, gate valves, globe valves, check valves, and more. Our products find widespread applications in industries such as heating, petroleum, natural gas, chemical engineering, power generation, construction, water supply, and drainage, among others.

At Yuming Valve Group, our mission is to provide advanced valve solutions to our customers. Quality is our foremost priority, and we ensure the excellence of each valve through advanced manufacturing techniques and rigorous quality control systems. Our dedicated technical team is readily available to support our customers and provide comprehensive after-sales service to ensure the smooth installation and operation of our valves.

Whether you are seeking high-quality valve products or require professional technical support, Yuming Valve Group is committed to becoming your trusted partner. We look forward to establishing long-term collaborative relationships and meeting your valve needs and solutions.