Stretch Type Turbine Driven Flange Butterfly Valve can stretch or shrink along with the shaft within a certain range and also overcome the displacement due to non-concentricity in the pipeline's butt-connection to the shaft within a certain range of angle, making great convenience for the installation and remove of both valve and pipeline. Suitable for the purifying pipeline in petroleum, electric power, food, beverage, medicine industries etc. and the pipeline in industrial environmental protection, water treatment, high buildings, water supply and drainage etc. to act as open-close, getting through and adjusting the medium's flow.

1. Standards of design :GB12238, API1609, JIS B2064
2. Standard of flange:GB4216.4, GB9115.8
3. Structural length: GB12221 face. To. Face. GB12221
4. Testing standards: GB/T13927, JB/T9092

DN(mm)		50~2000
PN(MPa)		0.6	1.0	1.6
Test  pressure (MPa)	Strength  test	0.9	1.5	2.4
	Seal test	0.66	1.1	1.76
Applicable medium		Water, Oil, Sea-water
Applicable temperature		≤80℃

Name of parts	Material
Body	C.l,  WCB
Wedge	C.l、No28A
stem	Stainless steel
Sealing ring	NBR PTFE
Packing	NBR PTFE V. washer

DN (mm)	PN (MPa)	Main external and  connection dimensions(mm)
		L	LMAX	LMIN	D1	D	Zφd	H	H0	D0
50	1.0/1.6	150	163	138	125	165	4-18	82.5	306	150
65		170	188	158	145	185	4-18	92.5	326	150
80		180	192	162	160	200	4-18/8-18	100	341	150
100		190	225	180	180	220	8-18	110	366	150
125		200	235	190	210	250	8-18	125	396	150
150		210	240	195	240	285	8-22	142.5	431	150
200		230	265	215	295	340	8-22/12-22	170	617	220
250		250	285	235	350/355	395/405	12-22/12-25	197.5	672	220
300		270	302	252	400/410	445/460	12-22/12-25	222.5	768	280
350		290	321	271	460/470	505/520	16-22/16-25	252.5	828	280
400		310	343	283	515/525	565/580	16-26/16-30	282.5	948	320
450	1.0	330	360	300	565	615	20-26	307.5	997	320
500		350	380	320	620	670	20-26	335	1053	320
600		390	425	365	725	780	20-30	390	1165	320
700		430	465	395	840	895	24-30	447.5	1380	400
800		470	510	430	950	1015	24-33	507.5	1500	400
900		510	560	460	1050	1115	28-33	557.5	1600	400
1000		550	600	500	1160	1230	28-36	615	1720	400
1200		570	680	580	1380	1455	32-39	727.5	1815	400
1400		640	780	710	1560	1630	36-39	854.2	1945	500
1600		720	860	790	1760	1830	40-36	973	2015	500
1800		800	940	870	1970	2045	44-39	1025	2235	500
2000		880	1020	950	2100	2125	48-42	1135	2565	500

1. The seal testing pressure of the above butterfly valves is 1.6MPa/1.0MPa for DN50-DN800; 1.0MPa/0.6MPa for DN900-DN1000; 0.6MPa/0.25MPa for DN1200-DN2000.
2. The connection dimensions for the above butterfly valves are set according to 1.0MPa standards; please make note when order in case of a special requirements.
3. The driven ways are available with handle, turbine screw rod, pneumatic, electric etc.