Manual worm gear triple eccentric flange butterfly valve

As a component used to realize the on-off and flow control of pipeline system, telescopic butterfly valve has been widely used in many fields such as petroleum, chemical industry, metallurgy, hydropower, etc. The butterfly plate of the worm gear drive telescopic butterfly valve is installed in the diameter direction of the pipe. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the rotation angle is between 0°~90°, and when the rotation reaches 90°, the valve is in a fully open state. This valve is generally installed horizontally.

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Product Description

Product Overview

The telescopic butterfly valve has the characteristics of simple structure, small size, light weight, low material consumption, small installation size, fast switch, 90° reciprocating rotation, small driving torque, etc., and is used to cut, turn on and adjust the medium in the pipeline, and has good fluid control characteristics and closing sealing performance. When the telescopic butterfly valve is in the fully open position, the thickness of the telescopic butterfly valve is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is very small, so it has good flow control characteristics. There are two types of seals: elastic seal and metal seal. Elastomeric seal valves, the sealing ring can be embedded in the valve body or attached to the perimeter of the butterfly plate.

Telescopic butterfly valves with metal seals generally have a longer life than elastomeric sealed valves, but it is difficult to achieve a complete seal. Metal seals can accommodate higher operating temperatures, while elastomeric seals have the disadvantage of being limited by temperature. If telescopic butterfly valves are required to be used for flow control, the main thing is to choose the correct size and type of valve. The structural principle of telescopic butterfly valves is particularly suitable for the production of large-diameter valves. Worm gear drive telescopic butterfly valve is not only widely used in general industries such as petroleum, gas, chemical industry, water treatment, etc., but also used in the cooling water system of thermal power station.

There are three commonly used telescopic butterfly valves: clamp butterfly valve, flange butterfly valve and butt-welded butterfly valve. The clamp butterfly valve is to connect the valve between the two pipe flanges with stud bolts; Flanged butterfly valve is a valve with a flange, and the flanges at both ends of the valve are connected to the pipeline flange with bolts; The two ends of the butt welded butterfly valve are welded with the pipeline. The streamlined design of the butterfly plate makes the fluid resistance loss small, which can be described as an energy-saving product. The valve stem is a through-rod structure, which has been quenched and tempered, and has good comprehensive mechanical properties, corrosion resistance and scratch resistance. When the butterfly valve is opened and closed, the valve stem only rotates and does not lift and fall, and the packing of the valve stem is not easy to be damaged, and the sealing is reliable. It is fixed with the cone pin of the butterfly plate, and the overhanging end is designed to prevent the valve stem from collapsing when the connection between the valve stem and the butterfly plate is accidentally broken.

Worm gear drive telescopic butterfly valve features:

1. Small and lightweight, easy to disassemble and maintain, and can be installed in any position.

2. The structure is simple and compact, the operating torque is small, and the 90-degree rotation opens quickly.

3. The flow characteristics tend to be straight, and the adjustment performance is good.

4. The connection between the butterfly plate and the valve stem adopts a pinless structure, which overcomes the possible internal leakage point.

5. The seals are replaceable, and the sealing is reliable to achieve two-way sealing.

6. The butterfly board can be sprayed according to user requirements, such as nylon or PTFE.

7. The valve can be designed as a flange connection and a clamp connection.

8. The driving mode can be manual, electric or pneumatic.

SD343 (H, F, X) - (6, 10, 16) connection size

DN	Design length	Maximum length	Minimum length	D1	D	n-d	H	H。	A	B	Mass / kg
50	151	164	138	125	165	4-18	82.5	400	180	65	17
65	172	190	154	145	185	4-18	92.5	400	180	65	19
80	177	195	163	160	200	8-18	100	410	245	72	20
100	206	227	184	180	220	8-18	110	430	245	72	25
125	215	254	201	210	250	8-18	125	465	245	72	32
150	225	240	195	240	285	8-22	142.5	615	355	93	35
200	245	265	215	295	340	8-22	170	685	355	93	60
250	265	295	235	350	395	12-22	197.5	740	550	350	83
300	282	308	254	400	445	12-22	222.5	800	600	350	110
350	300	325	271	460	505	16-22	252.5	860	600	350	130
400	314	345	283	515	565	16-26	282.5	945	750	380	166
450	340	370	314	565	615	20-26	307.5	1000	750	380	210
500	346	377	316	620	670	20-26	335	1060	750	380	252
600	417	446	388	725	780	20-30	390	1170	750	380	330
700	425	445	395	840	895	24-30	447.5	1325	750	380	630
800	455	479	425	950	1015	24-33	507.5	1445	750	380	1070
900	485	515	455	1050	1115	28-33	557.5	1555	650	280	1700
1000	495	525	465	1160	1230	28-36	615	1675	650	280	1950

SD643 (H, F, X) - (6, 10, 16) connection size

DN		H1	H2	H3	Maximum length	Minimum length	Design length	D1			n-d-m						Mass kg
mm	in	H1	H2	H3	Maximum length	Minimum length	Design length	0.6MPa	1.0MPa	1.6MPa	0.6MPa		1.0MPa		1.6MPa		Mass kg
50	2	309	112	117	164	138	151	110	125	125	4-14	M12	4-18	M16	4-19	16	14.3
65	21/2	337	112	117	190	154	172	130	145	145	4-14	M12	4-18	M16	4-19	16	16.8
80	3	347	135	117	195	163	177	150	160	160	4-18	M16	8-18	M16	8-19	16	18.7
100	4	373	142	117	227	184	206	170	180	180	4-18	M16	8-18	M16	8-19	16	26.2
125	5	405	160	117	254	201	215	200	210	210	8-18	M16	8-18	M16	8-19	16	33.6
150	6	440	180	117	240	195	225	225	240	240	8-18	M16	8-22	M20	8-23	20	37.3
200	8	612	225	212	265	215	245	280	295	295	8-18	M16	8-22	M20	12-23	20	68.7
250	10	693	266	212	295	235	265	335	350	350	12-18	M16	12-22	M20	12-28	24	86.8
300	12	747	290	212	308	254	282	395	400	400	12-22	M20	12-22	M20	12-28	24	120
350	14	802	320	212	325	271	300	445	460	460	12-22	M20	16-22	M20	16-28	24	157
400	16	991	400	265	345	283	314	195	515	515	16-22	M20	16-26	M24	16-31	27	227
450	18	1037	425	265	370	314	340	550	565	565	16-22	M20	20-26	M24	20-31	27	260
500	20	1127	480	265	377	316	346	600	620	620	20-22	M20	20-26	M24	20-34	30	300
600	22	1377	520	380	446	388	417	705	725	725	20-26	M24	20-30	M27	20-37	33	540
700	24	1796	577	380	445	395	425	810	840	840	24-26	M24	24-30	M27	20-37	33	684
800	32	1484	620	270	479	425	455	920	950	950	24-30	M27	24-33	M30	24-40	36	952
900	36	1676	715	285	515	455	485	1020	1050	1050	24-30	M27	28-33	M33	28-40	36	1290
1000	40	1760	760	285	525	465	495	1120	1160	1160	28-30	M27	28-36	M36	28-43	39	1456
1200	48	2018	900	285	574	495	542	1340	1380	1380	32-33	M30	32-39	M36	32-49	45	2310
1400	56	2363	1000	425	599	542	572	1560	1590	1590	36-36	M33	36-42	M39	36-49	45	2816
1600	64	2723	1160	425	640	615	615	1760	1820	1820	40-36	M33	40-48	M45	40-56	52	4218
1800	72	2844	1247	425	725	695	695	1970	2020	2020	44-39	M36	44-48	M45	44-56	52	5650
2000	80	3127	1362	425	764	722	722	2180	2230	2230	48-42	M39	48-48	M45	48-62	56	6000

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