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Beijing Valve General Factory Co., Ltd., formerly known as Beijing Valve General Factory, was established in 1952. It is a key backbone enterprise of the former Ministry of Machinery Industry manufacturing high and medium pressure valves and steam traps. It has a history of producing various types of valves for more than 70 years.
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It has been rated as a famous trademark of Beijing since 2009, and has won the “National High-tech Enterprise Certificate” for seven consecutive years.
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The vice chairman unit of the National Valve Industry Association and a member unit of the National Quality Inspection Association.Obtained a municipal valve R&D center institution.
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The product varieties of Beijing Valve Factory include various types of steam trap valves, liquefied petroleum gas gate valves, globe valves, ball valves, check valves, butterfly valves, high...
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北京市大兴区庞各庄镇绿海路3号

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河北省邯郸市成安县聚良大道北8号

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首页>Product>Butterfly valve> SD943H, SD343H telescopic butterfly valve

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SD943H, SD343H telescopic butterfly valve

The butterfly plate of the hard-sealed 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° and 90°. When it rotates to 90°, the valve is in a fully open state.

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Hard seal telescopic butterfly valve product introduction：

Application range of hard seal telescopic butterfly valve：

As a kind of component used to realize the on-off and flow control of pipeline systems, telescopic butterfly valves have been widely used in many fields such as petroleum, chemical industry, metallurgy, hydropower, etc.

The valve body and seat of the three-eccentric metal hard-sealed telescopic butterfly valve are conjoined components, and the surface layer of the valve seat seal is surfaced with temperature-resistant and corrosion-resistant alloy materials.The multi-layer soft-stacked sealing ring is fixed to the valve plate. Compared with the traditional butterfly valve, this butterfly valve has high temperature resistance, light operation, and no friction in opening and closing. When it is closed, the torque of the transmission mechanism increases to compensate for the sealing, which improves the sealing performance of the butterfly valve and extends the service life. It has the advantages of high temperature resistance, high pressure, corrosion resistance, anti-wear and other industries.

Structural characteristics of hard-sealed telescopic butterfly valve：

1. The design is novel and reasonable, the structure is unique, the weight is light, the operation is convenient, and the opening and closing are fast.;

2. In addition to regulating and shut-off functions, the hard-sealed telescopic butterfly valve can compensate for the thermal expansion and contraction functions caused by the temperature difference in the pipeline, and it can also provide convenience for the installation, replacement and maintenance of valves.;

3. The sealing parts can be adjusted and replaced, and the sealing performance is reliable.

Telescopic butterfly valve standard specification：

Design and manufacturing standards：GB/T 12238-2008、JB/T 8527-1997

Structure length standard：GB/T 12221-2005

Connecting flange standard：GB/T 9113

Pressure temperature level：GB/T 12224-2005

Test and inspection standards：GB/T 13927-2008

Telescopic butterfly valve parts materials and working conditions：

Part name	Material
Valve body	WCB、QT450-10、Stainless steel
Butterfly board	WCB、QT450-10、Stainless steel
Valve shaft	2Cr13 stainless steel
Sealing ring	Rubber
Packing	Flexible graphite

DS342H/Y-6/10/16C Main connection size of telescopic butterfly valve：

Nominal diameter DN		Dimensions (reference value)							Flange size and bolt hole size (standard value)
Nominal diameter DN		H	H1	maximum length	minimum length	design length L	A	B	O．6MPa				1．OMPa				1.6MPa
mm	inches	H	H1	maximum length	minimum length	design length L	A	B	D	D1	D2	n．d	D	D1	D2	n．d	D	D1	D2	n-d
50	2	80	309	169	142	150	180	200	140	110	88	4.14	165	125	99	4-18	165	125	99	4-18
65	21/2	95	337	186	159	170	180	200	160	130	108	4.14	185	145	118	4-18	185	145	118	4-18
80	3	98	347	194	167	180	180	200	190	150	124	4.18	200	160	132	8-18	200	160	132	8-18
100	4	114	373	219	188	190	180	200	210	170	144	4.18	220	180	156	8-18	220	180	156	8-18
125	5	128	405	225	195	200	180	200	240	200	174	8.18	250	210	184	8-18	250	210	184	8-18
150	6	139	440	240	205	210	270	280	265	225	199	8-18	285	240	211	8-22	285	240	211	8-22
200	8	174	612	259	219	230	400	425	320	280	254	8-8	340	295	266	8-22	340	295	266	12-22
250	10	215	693	384	239	250	400	425	375	335	309	12-18	395	350	319	12-22	405	355	319	12-26
300	12	245	747	309	259	270	450	560	440	395	363	12-22	445	400	370	12-22	460	410	370	12.26
350	14	270	802	328	275	290	450	560	490	445	413	12-22	505	460	429	16-22	520	470	429	16-26
400	16	305	991	347	287	310	535	580	540	495	463	16-22	565	515	480	16-26	580	525	480	16-30
450	18	325	1037	378	318	330	535	580	595	550	518	16-22	615	565	530	20-26	640	585	548	20-30
500	20	360	1127	399	339	350	535	580	645	600	568	16-22	670	620	582	20-26	715	650	609	20-33
600	24	445	1377	430	362	390	570	660	755	705	667	20-26	780	725	682	20-30	840	770	720	20-36
700	28	505	1496	469	399	430	750	550	860	810	772	24-26	895	840	794	24-30	910	840	794	24-36
800	32	560	1584	529	454	470	750	550	975	920	878	24-30	1015	950	901	24-33	1025	950	901	24-39
900	36	630	1676	569	494	510	750	550	1075	1020	978	24-30	1115	1050	1001	28-33	1125	1050	1001	28-39
1000	40	680	1760	608	534	550	900	750	1175	1120	1078	28-30	1230	1160	1112	28-36	1255	1170	1112	28-42
1200	48	795	2018	720	614	630	1000	925	1405	1340	1295	32-33	1455	1380	1328	32-39	1485	1390	1328	32-48
1400	56	900	2363	747	665	710	1000	925	1620	1560	1510	36-36	1675	1590	1530	36-42	1685	1590	1530	36-48
1600	64	1100	2723	850	745	790	1000	925	1820	1760	1710	40-36	1915	1820	1750	40-48	1930	1820	1750	40-56
1800	72	1124	2844	920	820	870	1100	980	2045	1970	1718	44-39	2115	2020	1950	44-48	2130	2020	1950	44-56
2000	80	1292	3127	1010	900	950	1100	980	2265	2180	2125	48-42	2325	2230	2150	48-48	2345	2230	2150	48-62

Precautions for installation and use of telescopic butterfly valve

1. The hard-sealed telescopic butterfly valve must be placed flat before installation, and do not bump into it at will.

2. The structural length of the telescopic butterfly valve is the minimum length when it is shipped from the factory. When it is installed, it should be pulled to the installation length (that is, the design length).

3. When the length of the pipe exceeds the installation length of the expansion valve, please adjust the pipe spacing and do not forcibly stretch the expansion valve to avoid damage to the expansion valve.

4. The telescopic butterfly valve can be installed at any position. When it is used for temperature compensation, after the pipeline installation is completed, brackets need to be added at both ends along the axis of the pipeline to prevent the telescopic valve from pulling out the telescopic pipe (see Figure 1 below). The support force of the bracket is calculated according to the following formula. It is strictly forbidden to remove the bracket during operation.F>π/4 Three PS•DN•(kgf) where: PS-pipeline test pressure, DN-pipeline diameter

5. When the telescopic butterfly valve is not temperature compensated, it is only used for installation, replacement, and maintenance of the valve. When it is convenient to use, the through bolt limit can be used to clamp the telescopic butterfly valve symmetrically to prevent the telescopic pipe from being pulled out (see Figure 2 below), damaging the telescopic butterfly valve and pipeline equipment or buildings.The diameter of the bolt can be calculated according to the diameter of the flange bolt, the strength of the bolt, the test pressure and the tension of the pipe, according to the above formula. It is strictly forbidden to remove the limit bolt during operation (the bolt is equipped separately)

6. It is strictly forbidden to disassemble and disassemble the hard-sealed telescopic butterfly valve at will at the pipeline construction site.

7. Hard-sealed telescopic butterfly valve, with fine processing and tight cooperation, please do not repeatedly lengthen and shorten the telescopic butterfly valve on site.When the pipeline is installed, it is required that the pipes at both ends of the telescopic valve must be concentric, and the two flange surfaces on the pipeline must be parallel.

8. The flange fixing bolts should be tightened proportionally, and the flange fixing bolts should not be forcibly tightened unilaterally.

9. The telescopic tube is installed behind the valve.

Statement: All text, data, and pictures in this article are only applicable for reference. For details such as valve performance parameters, structure size parameters, and price, please contact us at 010-89283399.