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Model: SD341X
Nominal diameter: DN50 ~ 2000mm
Nominal pressure: PN0.6 ~ 1.6MPa
Suitable medium: water, air, natural gas, oil and weak corrosive fluid
Drive: worm gear, electric, pneumatic, hydraulic
Body material: WCB, QT450 -10, stainless steel
Manufacturing standards: JB / T8527-97, GB / T 122387-89
Flange standard: GB9113-2000, GB17241.6-1998
Inspection standards: GB / T 13927-92

Product introduction

Flange telescopic butterfly valve with automatic compensation for thermal expansion and contraction of the convenience of loading and unloading functions, used at temperatures below 120 ℃, the nominal pressure of 1.6MPa below the oil, chemical, power, papermaking, water supply and municipal construction and other industrial pipelines The best device for regulating flow and breaking fluid.

 working principle

Flange retractable butterfly valve is divided into three types: 
A, ordinary type: When used according to the design specifications of expansion joints design and installation, such as the need to add limit bolts, please indicate when designing. 
B, fixed limit type: it can be retractable, but also limit, with the telescopic part of the fixed function of not letting its expansion. Its features are multi-functional, wider scope of application. 
C, lengthened: it is the ordinary expansion telescopic extension of the butterfly valve lengthened to make it the length of the length required by the user (not including the amount of expansion), which is characterized by the transformation of the old pipe, the valve on the original pipeline needs to be updated Replacement, without the original pipeline on the connecting part of the pipeline cut off, you can replace it. Extended type selection should also be considered plus limit measures, such as the limit please specify when designing.
 

Features:

1, sealing parts can be adjusted replacement, reliable sealing performance.

2, unique structure, flexible design, light weight, labor-saving, quick opening and closing.

3, telescopic butterfly valve can not only compensate for the thermal expansion and contraction shrinkage caused by the pipe temperature difference, but also for the maintenance of valve installation and replacement to provide convenience.
 

Installation Precautions:

1, Flange retractable butterfly valve must be placed flat before installation, do not bump freely, the operation is prohibited to remove the bracket.

2, Flange retractable butterfly valve factory structure length of the minimum length, installation, pulled to the installation length (ie, design length).

3, when the pipe length exceeds the telescopic valve installation length, please adjust the pipe interval, do not forcibly stretch the butterfly valve, so as not to damage the butterfly valve.

4, Flange retractable butterfly valve can be installed in any, do temperature compensation with the installation of the pipeline is completed, the direction along the pipe axis to be added at both ends of the bracket to prevent telescopic tube telescopic tube pulled out.

 The main dimensions PN1.0MPa

DN (mm)	Manual device	D	D1	d	b	C	L			n-d0	4-M	H	H1	H2	L1	L2	L3	L4	L5	φ	WT  (kg)
							L0	Lmax	Lmin
300	3D-30/250	445	400	370	28	57	282	302	252	8-φ23	M27	959	542	267	449	178	254	104	473	300	148
350	3D-30/250	505	460	429	30	64	301	321	271	12-φ23	M20	1048	583	315	449	178	254	104	473	300	188
400	3D-30/250	565	515	480	32	70	313	333	283	12-φ28	M24	1120	620	350	449	178	254	104	473	300	237
450	3D-30/250	615	565	530	32	76	334	354	304	16-φ28	M24	1190	667	373	449	178	254	104	473	300	268
500	3D-30/400	670	620	582	34	76	346	366	316	16-φ28	M24	1280	702	428	486	178	254	130	528	300	289
600	3D-60/800	780	725	682	36	89	398	418	368	16-φ31	M27	1409	759	450	627	196	245	162	596	400	480
700	3D-60/800	895	840	794	40	115	425	445	395	20-φ31	M27	1613	885	528	627	244	245	162	596	400	645
800	3D-120 / 1500	1015	950	901	44	120	455	475	425	20-φ34	M30	1736	1013	573	635	244	295	196	711	300	818
900	3D-120 / 1500	1115	1050	1001	46	120	485	505	455	24-φ34	M30	1860	1071	639	635	270	295	196	711	300	956
1000	3D-120 / 1500	1230	1160	1112	50	150	495	515	465	24-φ37	M33	2107	1234	723	955	270	296	295	807	300	1277
1200	3D-120 / 1500	1455	1380	1328	56	175	542	562	512	28-φ40	M366	2326	1343	833	955	455	296	295	807	300	1764
1400	3D-200/4000	1675	1590	1530	62	195	612	632	582	32-φ43	M39	2996	1668	1078	1270	455	387	414	1089	500	4280
1600	3D-200/4000	1915	1820	1750	68	220	640	660	610	36-φ49	M45	3246	1778	1218	1270	598	387	414	1089	500	4953
1800	3D-200/12000	2115	2020	1950	70	245	710	730	680	40-φ49	M45	3720	2044	1426	1628	745	387	602	1399	500	7416
2000	3D-600/12000	2325	2230	2150	74	270	775	795	745	44-φ49	M45	3851	2115	1486	1630	750	417	602	1399	500	9372