Double Flanged Eccentric Butterfly Valve Manufacturer & Suppliers-Flowspec Luokai

Double Flanged Eccentric Butterfly Valve Descriptions

Double flanged eccentric butterfly valve is one type of high performance butterfly valve, which is with eccentric action reduces torque and seat contact during operation, extending the valve service life. Its seat can be repaired on site, no needing dis-assembly. The double flanged eccentric butterfly valve is suitable for 90° on-off operation and regulation service. Flowspec Luokai can produce the double flanged butterfly valve according to GB12238, AWWA C504 and EN593. Just feel free to contact us now to get best prices. 30 years of experience. High quality. Big stock. Fast delivery.

1. FEATURES

Eccentric action reduces torque and seat contact during operation, extending valve service life
Suitable for 90° on-off operation and regulation service
The seat can be repaired on site, no needing dis-assembly
Epoxy coating for corrosion resistance and long service life
Good sealing capability, no leakage

3. STANDARDS

Design & manufacturing: GB12238, AWWA C504, EN593
Face to face: ISO 5752, AWWA C504, GB12221, EN558-1, ANSI B16.10
Flanged ends: ANSI B16.5 ANSI 125/150; EN1092-2 PN10/PN16, DIN 2501 / BS 4504 / GB 17241.6 PN10/PN16
Top flange: ISO 5211
Inspection & testing: API598, GB13927

2. TECHNICAL SPECIFICATIONS

ANSI 125/150LB, PN1.0/PN1.6MPa, JIS5K/10K
Size: 4″~120″ (100~3000mm)
Materials: A126 B (GG25), A536 65-45-12 (GGG40), A216 WCB, S.S.304(CF8), S.S.316(CF8M), B148 C954
Epoxy coating with thickness ≥250μm
Applicable medium: water, sewage, sea water, air, food, medicine, oil, corrosive liquids
Applicable temperature: -20℃~+80℃ (higher temperature is available upon request)

4. APPLICATIONS

Water works, water projects
Environment protection
Public facilities
Power plant
Building industry, real estate
Petroleum, chemical industry
Steel work, metallurgy
Water treatment plant

A: Body

Short in structure, light in weight, highstrength, apply to wafer (small diameter) andflange connection.

B: Disc

High strength disc with precise machining,assure bi-direction pressure bearing and noleakage.

C: Shaft

High strength stainless steel shaft can delivertorque effectively.

D: Upper Flange

Available in actuators with various connectionstandards.

E: Packing Gland

Through pressing the packing gland, canprevent stem end from leakage.

F: Sealing Ring

The secondary shaft seal prevents fromimpurities and protects the shaft.

G:Bushing

Made of lubricant and small friction coefficientmaterial, support shaft and reduce rotationtorque.

H: Bottom Cover

Support disc by wearing washer and shaft,prevent falling and assure sealing performance.

I: Wearing Washer

Prevent the shaft end from wearing, reducerotation torque, and assure the disc in rightposition.

J: Seat Sealing Ring

High quality rubber ring, fixed on body, assuresno leakage. No more washers when valveconnects with flange.

K: O-Ring

Applied as secondary seal, prevent shaft endleakage.

Main Parts Materials of Series DL Flange Butterfly Valve

No.	Part	Material	No.	Part	Material
1	Body	HT200,A126 ClassB QT450-10,A53665-45-12 WCB	7	O-Ring	NBR EPDM
2	Bushing	ZCuZn38Mn2Pb2, Bronze F4 Backing Steel	8	Key	45 1045
3	Shaft	416 420 431 17-4PH	9	End Plate	QT450-10 Q235-A Gr33
4	Seat	NBR EPDM Viton	10	O-Ring	NBR EPDM
5	Disc	DI ALB CF8 CF8M 1.4529、1.4469	11	Hex. Bolt	Q235-A Gr.33
6	Taper Pin	416 420 431 17-4PH	12	Spring Gasket	Spring Steel
Note: Materials indicated in above table are for common usage, please give clear declaration in your contract if there is special need.

DN	A	B	b	f	D	K	d	F	N-do	L	L1	D1	D2	N×d1	a°	J	X	L2	∅2	Weight
50	83	120	19	3	165	125	99	13	4-19	108	111	65	50	4-7	45	13.8	3	32	12.6	7.6
65	93	130	19	3	185	145	118	13	4-19	112	115	65	50	4-7	45	13.8	3	32	12.6	9.7
80	100	145	19	3	200	160	132	13	8-19	114	117	65	50	4-7	45	13.8	3	32	12.6	10.6
100	114	155	19	3	220	180	156	13	8-19	127	130	90	70	4-10	45	17.77	5	32	15.77	13.8
125	125	170	19	3	250	210	184	13	8-19	140	143	90	70	4-10	45	20.92	5	32	18.92	18.2
150	143	190	19	3	285	240	211	13	8-23	140	143	90	70	4-10	45	20.92	5	32	18.92	21.7
200	170	205	20	3	340	295	266	13	12-23	152	155	125	102	4-12	45	24.1	5	45	22.1	31.8
250	198	235	22	3	405	355	319	13	12-28	165	168	125	102	4-12	45	31.45	8	45	28.45	44.7
300	223	280	24.5	4	460	410	370	20	12-28	178	182	125	102	4-12	45	34.6	8	45	31.6	59
350	270	310	26.5	4	520	470	429	20	16-28	190	194	150	125	4-14	45	36.15	10	45	33.15	86
400	300	340	28	4	580	525	480	20	16-31	216	221	175	140	4-18	45	40.95	10	51	37.95	119
450	340	375	30	4	640	585	530	20	20-31	222	227	175	140	4-18	45	45.86	12	51	42.86	165
500	355	430	31.5	4	715	650	582	22	20-34	229	234	210	165	4-22	45	49.22	14	57	45.72	185
600	410	500	36	5	840	770	682	22	20-37	267	272	300	254	8-18	22.5	57.98	15	70	53.98	263
700	478	560	39.5	5	910	840	794	30	24-37	292	299	300	254	8-18	22.5	71.35	18	66	63.35	361
800	529	620	43	5	1025	950	901	30	24-41	318	325	350	298	8-22	22.5	79	20	66	70	484
900	584	685	46.5	5	1125	1050	1001	34	28-41	330	337	350	298	8-22	22.5	90	22	118	80	598
1000	657	735	50	5	1255	1170	1112	34	28-44	410	417	350	298	8-22	22.5	100	25	142	90	824
1200	799	917	57	5	1485	1380	1328	34	32-50	470	478	415	356	8-33	22.5	117	28	150	105	1223
1400	919	1040	60	5	1685	1590	1530	40	36-50	530	538	415	356	8-33	22.5	134	32	200	120	2386
1500	965	1050	62.5	5	1820	1710	1630	40	36-57	570	580	415	356	8-32	22.5	156	36	200	140	3475
1600	1045	1150	65	5	1930	1820	1700	50	40-57	600	610	415	365	8-32	22.5	156	36	200	140	4055
1800	1280	1290	70	5	2130	2020	1914	55	44-57	670	682	475	406	8-40	22.5	178	40	280	160	5570
2000	1350	1323	75	5	2345	2230	2130	55	48-62	760	772	475	406	8-40	22.5	178	40	280	160	7240