Lug Type Wafer Butterfly Valve

Item Number:

Lug type wafer butterfly valve is a type of valve that is designed to regulate flow in pipelines. It is a straightforward valve that consists of a disc, seat, stem, and actuator. The valve is mounted between two flanges using bolts and nuts, and it is designed to be able to accommodate bi-directional flow. When the valve is closed, the disc seals against the seat, blocking the flow of fluid through the pipeline. When the valve is open, the disc rotates away from the seat, allowing fluid to flow freely through the pipeline. The lug type wafer butterfly valve is a popular choice for many applications due to its simplicity, low cost, and high flow capacity.

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	Lug
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	A	B	C	D	L	H	D1	n-M	E	n1-φ2	φ2	G	J	X	f
50	2	161	80	43	52.9	32	88.38	125	4-M16	57.15	4-6.7	12.6	155	13.8	3	13
65	2 1/2	175	89	46	64.5	32	102.54	145	4-M16	57.15	4-6.7	12.6	179	13.8	3	13
80	3	181	95	45.21	78.8	32	61.23	160	8-M16	57.15	4-6.7	12.6	190	13.8	3	13
100	4	200	114	52.07	104	32	68.88	180	8-M16	69.85	4-10.3	15.77	220	17.77	5	13
125	5	213	127	55.5	123.3	32	80.36	210	8-M16	69.85	4-10.3	18.92	254	20.92	5	13
150	6	226	139	55.75	155.6	32	91.84	240	8-M20	69.85	4-10.3	18.92	285	20.92	5	13
200	8	260	175	60.58	202.5	45	112.89	295	8-M20	88.9	4-14.3	22.1	339	24.1	5	13
							76.35		12-M20
250	10	292	203	68	250.5	45	90.59	350	12-M20	88.9	4-14.3	28.45	406	31.45	8	13
							91.88	355	12-M24
300	12	337	242	68	301.6	45	103.52	400	12-M20	107.95	4-14.3	31.6	477	34.6	8	20
							106.12	410	12-M24
350	14	386	267	76.9	333.3	45	89.74	460	16-M20	107.95	4-14.3	31.6	515	34.6	8	20
							91.69	470	16-M24
400	16	400	325	85.7	389.6	51.2	100.48	515	16-M24	158.75	4-20.6	33.15	579	36.15	10	20
						72	102.42	525	16-M27
450	18	422	345	104.6	440.5	51.2	88.38	565	20-M24	158.75	4-20.6	37.95	627	41	10	20
						72	91.51	858	20-M27
500	20	480	378	130.26	491.6	57	96.99	620	20-M24	158.75	4-20.6	41.15	696	44.15	10	22
						82	101.68	650	20-M30
600	24	562	475	151.36	592.5	70.2	113.42	725	20-M27	215.9	4-22.2	50.65	821	54.65	16	22
						82		770	20-M33

Lug Type Wafer Butterfly Valve