Bi directional telescopic butterfly valve

Product overview

Telescopic butterfly valve is suitable for water supply and drainage and gas pipelines with temperature ≤80℃ and nominal pressure ≤ 1.6mpa, such as food, medicine, chemical industry, petroleum, electric power, light textile, papermaking, etc., to regulate the flow rate and closure medium, and has the function of compensating thermal expansion and cold contraction of pipelines.

Main features

1. Novel design, reasonable, unique structure, light weight, easy operation, quick opening and closing

2. telescopic butterfly valve in addition to adjustment and closure function, compensation pipe temperature difference generated by the heat expansion and cold contraction function, but also for installation, replacement, maintenance of the valve to provide convenience

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

With a standard

Design standard :GB/T12238-1989

Flange connection size :GB/T9113.1-2000; GB/T9113.2-2000

GB/T9115.1-2000; GB/T9115.2-2000

Pressure test :GB/T13927-1992; JB/T9092-1999

Main shape and connection size

nominal Diameter	Overall dimension (reference value)							Flange size and bolt hole size (standard value)
nominal Diameter	H	H1	Design the most Large length	Design the most Small length	Design length	A	B	0.6MPa				1.0MPa				1.6MPa
millimeter	H	H1	Design the most Large length	Design the most Small length	Design length	A	B	D	D1	D2	n-d	D	D1	D2	n-d	D	D1	D2	n-d
50	80	309	186	156	171	180	200	140	110	88	4-14	165	125	99	4-18	165	125	99	4-18
65	95	337	190	160	175	180	200	160	130	108	4-14	185	145	118	4-18	185	145	118	4-18
80	98	347	198	166	182	180	200	190	150	124	4-18	200	160	132	8-18	200	160	132	8-18
100	114	373	228	188	208	180	200	210	170	144	4-18	220	180	156	8-18	220	180	156	8-18
125	128	405	240	201	220	180	200	240	200	174	8-18	250	210	184	8-18	250	210	184	8-18
150	139	440	246	206	226	270	280	265	225	199	8-18	285	240	211	8-22	285	240	211	8-22
200	174	612	265	219	242	400	425	320	280	254	8-18	340	295	266	8-22	340	295	266	12-22
250	215	693	295	240	267	400	425	375	335	309	12-18	395	350	319	12-22	405	355	319	12-26
300	245	747	308	254	282	450	560	440	395	363	12-22	445	400	370	12-22	460	410	370	12-26
350	270	802	327	272	300	450	560	490	445	413	12-22	505	460	429	16-22	520	470	429	16-26
400	305	991	368	308	338	535	580	540	495	463	16-22	565	515	480	16-26	580	525	480	16-30
450	325	1037	370	310	340	535	580	595	550	518	16-22	615	565	530	20-26	640	585	548	20-30
500	360	1127	392	332	362	535	580	645	600	568	20-22	670	620	582	20-26	715	650	609	20-33
600	445	1377	441	375	408	570	660	755	705	667	20-26	780	725	682	20-30	840	770	720	20-36
700	505	1496	460	400	430	750	550	860	810	772	24-26	895	840	794	24-30	910	840	794	24-36
800	560	1584	499	445	475	750	550	975	920	878	24-30	1015	950	901	24-33	1025	950	901	24-39
900	630	1676	520	460	490	750	550	1075	1020	978	24-30	1115	1050	1001	28-33	1125	1050	1001	28-39
1000	680	1760	600	530	565	900	750	1175	1120	1078	28-30	1230	1160	1112	28-36	1255	1170	1112	28-42
1200	795	2018	675	571	623	1000	925	1405	1340	1295	32-33	1455	1380	1328	32-39	1485	1390	1328	32-48
1400	900	2363	760	683	722	1000	925	1630	1560	1510	36-36	1675	1590	1530	36-42	1685	1590	1530	36-48
1600	1100	2723	860	770	815	1000	925	1830	1760	1710	40-36	1915	1820	1750	40-48	1930	1820	1750	40-56
1800	1124	2844	930	830	880	1100	980	2045	1970	1718	44-39	2115	2020	1950	44-48	2130	2020	1950	44-56
2000	1292	3127	1020	920	970	1100	980	2265	2180	2125	48-42	2325	2230	2150	48-48	2345	2230	2150	48-62

Note for installation and use of telescopic butterfly valve

1, telescopic butterfly valve before installation must be flat, do not knock against

2. The structure length of telescopic butterfly valve is the minimum length when it leaves the factory. During installation, pull to the installation length (i.e., the design length).

3. When the length between the pipes exceeds the installation length of the telescopic valve, please adjust the spacing of the pipes and do not force the telescopic valve to avoid damaging the telescopic valve

4. The telescopic butterfly valve can be installed at any time to compensate the temperature. After the pipe is installed, brackets shall be added along the pipe axis to prevent the telescopic pipe of the telescopic valve from being pulled out (see Figure 1)

F > PI - 4 ps, DN2, (KGF)

In the formula: PS- pipe test pressure, DN- pipe diameter

5. When the telescopic butterfly valve does not do temperature compensation, it is only convenient to install, replace and maintain the valve. When it is convenient, you can pass the butterfly bolt limit and tighten the telescopic butterfly valve symmetrically to prevent the telescopic pipe from pulling out (see Figure 2) and damage the telescopic butterfly valve and piping devices or buildings. The bolt diameter can be calculated according to the flange bolt diameter, bolt strength, test pressure and pipeline tension, according to the above formula, the running time limit of the bolt is strictly prohibited to be removed (bolts with other)

6. It is strictly prohibited to disassemble and disassemble telescopic butterfly valve at the pipeline construction site

7. This telescopic butterfly valve has fine processing and strict coordination. Please do not repeatedly stretch and press short telescopic butterfly valve on site. When installing the pipe, both ends of the pipe must be concentric, and the two flange faces on the pipe must be parallel

Flange fixing bolts should be tightened symmetrically, do not tighten flange fixing bolts unilaterally

9. Telescopic pipe is installed behind the valve

Expansion valve expansion part shall not be installed at the pipe corner or the end of the pipe

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