Double flange butterfly valve

Item Number:

Double flange butterfly valve is a type of valve that regulates flow through a pipeline. It has two flanges that connect to the pipe on either side of the valve. The valve is operated by a disc that rotates around a central axis to control fluid flow. It is commonly used in industrial applications such as water and wastewater treatment, chemical processing, and HVAC systems. It is known for its high flow capacity, low pressure drop, and easy maintenance. Double flange butterfly valves are available in various sizes and materials to fit different applications.

Material of main parts

Part Name	Material
Body	Cast Iron,Ductile Iron,WCB,Stainless Steel,Bronze
Seat	NBR,EPDM,VITON,PTFE
Disc	Ductile Iron,WCB,304 CF8,316 CF8M,AI-bronze C958
Stem	SS416,SS304,SS316
End Connection	Flange
Operate	Manual,Worm gear,Pneumatic,Electric-Motorized
Disc Type	With-pin,One stem no-pin,Double stem no-pin

Valve Design

Technical Specification
Valve Design	GB/T12238,API609,MSS SP-67
Face to Face	GB/T12221,API609,MSS SP-67,DIN3202,BS EN558-1
Pressure Test	GB/T13927,API598
Flange Drilling	GB/T17241.6,ASI B16.1 Class125,BS4504 PN10/PN16 DIN2501 PN10/PN16
Top Flange	It can be customized to 5211 standard

Main external and connecting dimensions(mm)

DN	NPS	φD			φD1			φD2			N x U			L	H	K	E	φG	C	n x φd	&
DN	NPS	PN10	PN16	150LB	PN10	PN16	150LB	PN10	PN16	150LB	PN10	PN16	150LB	L	H	K	E	φG	C	n x φd	&
40	1 1/2	150	150	125	110	110	98.4	84	84	13	4 x φ19	4 x φ19	4 x φ16	106	28	77	57	12.6	3	4 x φ7	90°
50	2	165	165	150	125	125	120.7	99	99	92.1	4 x φ19	4 x φ19	4 x φ19	108	28	77	57	12.6	3	4 x φ7	90°
65	2 1/2	185	185	180	145	145	139.7	118	118	104.8	4 x φ19	4 x φ19	4 x φ19	112	28	77	57	12.6	3	4 x φ7	90°
80	3	200	200	190	160	160	152.4	132	132	127	8 x φ19	8 x φ19	4 x φ19	114	28	77	57	12.6	3	4 x φ7	90°
100	4	220	220	230	180	180	190.5	156	156	157.2	8 x φ19	8 x φ19	8 x φ19	127	32	92	70	15.77	5	4 x φ10	90°
125	5	250	250	255	210	210	215.9	184	184	185.7	8 x φ19	8 x φ19	8)x φ22	140	32	92	70	18.92	5	4 x φ10	90°
150	6	285	285	280	240	240	241.3	211	211	215.9	8 x φ23	8 x φ23	8 x φ22	140	32	92	70	18.92	5	4 x φ10	90°
200	8	340	340	345	295	295	298.5	266	266	269.9	8 x φ23	12 x φ23	8 x φ22	152	42	115	89	22.1	5	4 x φ14	90°
250	10	395	405	405	350	355	362	319	319	323.8	12 x φ23	12 x φ28	12 x φ26	165	45	115	89	28.45	8	4 x φ14	90°
300	12	445	460	485	400	410	431.8	370	370	381	12 x φ23	12 x φ28	1) x φ26	178	45	140	108	31.6	8	4 x φ14	90°
350	14	505	520	535	460	470	476.3	429	429	412.8	16 x φ23	16 x φ28	12 x φ29	190	45	140	108	31.6	8	4 x φ14	90°
400	16	565	580	595	515	525	539.8	480	480	469.9	16 x φ28	1) x φ31	16 x φ29	216	55	197	159	33.15	10	4 x φ20	90°
450	18	615	640	635	565	585	577.9	530	548	533.4	20 x φ28	20 x φ31	16 x φ32	222	55	197	159	37.95	10	4 x φ20	90°
500	20	670	715	700	620	650	635	582	609	584.2	20 x φ28	20 x φ34	20 x φ32	229	55	197	159	41.15	10	4 x φ20	90°
550	22	730	775	750	675	710	692.1	633	666	637.1	20 x φ31	20 x φ34	20 x φ35	267	55	197	159	41.15	10	4 x φ20	90°
600	24	780	840	815	725	770	749.3	682	720	692.2	20 x φ31	20 x φ37	20 x φ35	267	70	276	216	50.65	16	4 x φ22	90°
650	26	835	860	870	780	790	806.4	736	743	749	24 x φ31	24 x φ37	24 x φ35	292	70	276	216	50.65	16	4 x φ22	90°
700	28	895	910	925	840	840	863.6	794	794	800	24 x φ31	24 x φ37	28 x φ35	292	80	300	254	63.35	2 x 18	8 x φ18	90°
750	30	965	970	985	900	900	914.4	854	854	857	24 x φ34	24 x φ37	28 x φ35	308	80	300	254	63.35	2 x 18	8 x φ18	90°
800	32	1015	1025	1060	950	950	977.9	901	901	914	24 x φ34	24 x φ40	28 x φ42	318	80	300	254	63.35	2 x 18	8 x φ18	90°
900	36	1115	1125	1170	1050	1050	1085.8	1001	1001	1022	28 x φ34	28 x φ40	32 x φ42	330	110	300	254	75	2 x 20	8 x φ18	22.5°
1000	40	1230	1255	1290	1160	1160	1200.2	1112	1112	1124	28 x φ37	28 x φ43	36 x φ42	410	110	300	254	85	2 x 22	8 x φ18	22.5°
1100	44	1340	1355	1405	1270	1270	1314.4	1215	1215	1245	32 x φ37	32 x φ43	40 x φ42	450	120	300	254	95	2 x 25	8 x φ18	22.5°
1200	48	1455	1485	1510	1380	1380	1422.4	1328	1328	1359	32 x φ40	32 x φ49	44 x φ42	470	150	350	298	105	2 x 28	8 x φ22	22.5°

Double flange butterfly valve