Manual on-off butterfly valve with wafer connection, ductile iron casting material

Short Description:

The D71X-16Q wafer butterfly valve is a type of valve with a disc-shaped butterfly plate as the opening/closing component, which can rotate around the inner axis of the valve body. The wafer butterfly valve is mainly composed of the valve body, valve stem, butterfly plate, and sealing ring. The valve body is cylindrical with a short axial length and contains an internal butterfly plate. Driven by the valve stem, the butterfly plate can be rotated 90° to open or close and control the flow of the medium.

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Product Detail

Production workshop

QC

Shipments to customers

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Features

1.The groove type valve seat can ensure accurate connection between the valve body,valve seat,and butterfly plate,and it is also very convenient to replace the valve seat,which helps to prevent the valve seat from being rubbed up and deformed due to improperinstallation.

2.The O-shaped sealing ring of the valve seat is directly embedded in the valve shaft hole of the valve body.When the valve stem is inserted into the butterfly plate hole through a connected “O”-shaped sealing ring,the connected ”O” · shaped sealing ring expands outward and tightly contacts the valve body. ensuring that in the event of internal leakage,the medium will not flow between the valve body and the valve seat,leading to accidents such as valve seat locking or valve seat bursting.

3.The organic combination of narrowband sealing ring and spherical butterfly plate ensures that the torque of the butterfly plate does not increase before closing: The valve seat reduces friction,reduces opening and closing torque,extends the service life of the valve seat,and ensures that the opening and closing torque of the valve does not change for a long time.

4.The middle thrust connecting rod prevents the possibility of the lower valve stem detaching from the valve body due to frequent vibration caused by external forces.

5. The convex circle on the valve seat can prevent the possibility of severe deformation of the valve seat and a sharp increase in valve torque in the event of incorrect installation.It can also prevent the occurrence of valve seat creep during opening and closing due to impurities adhering to the valve seat surface after a period of use.

6.The sealing surface of the valve seat flange adopts a structure with large wide edges and large arcs,which allows the valve to fully adapt to various flange connection requirements such as sleeve fit and butt welding.

Technical data

DN(mm)Nominal diameter		50(2″)~1000(40″)
PN(MPa)Nominal pressure		1.0	1.6	2.5
Testing pressure	Shell	1.5	2.4	3.75
	Sealing	1.1	1.76	2.75
Working temperature(℃)		-15~+150
Suitable mediums		Fresh water,sewage,sea water,air,steam,food,medicine,oils,acids,etc.

Main Size Table

DN		A	B	L	D	D1	D2	H	n-middle	E	F	n1-φ1	φ2	h
mm	inch
50	2″	132	72	42	125	118	52.9	84.84	4-18	77	57	4-7	12.6	30
65	21/2″	138	82	45	145	137	64.5	96.2	8-18	77	57	4-7	12.6	30
80	3″	153	95	45	160	143	78.8	61.23	8-18	77	57	4-7	12.6	30
100	4″	168	107	52	180	156	104	70.80	8-18	92	70	4-10	15.8	30
125	5″	183	125	55	210	190	123.3	82.28	8-18	92	70	4-10	18.9	30
150	6″	195	137	56	240	212	155.6	91.08	8-22	92	70	4-10	18.9	30
200	8″	235	169	60	295	268	202.5	112.89/76.35	8-22/12-22	115	89	4-14	22.1	45
250	10″	267	207	66	350/355	325	250.5	92.40	12-22/12-26	115	89	4-14	28.6	45
300	12″	305	236	77	400/410	403	301.6	105.34	12-22/12-26	140	108	4-14	31.6	45
350	14″	359	265	77	460/470	436	333.3	91.11	16-22/16-26	140	108	4-14	31.6	45
400	16′	392	310	86	515/525	488	389.6	100.47/102.42	16-26/16-30	197	159	4-21	33	50
450	18″	420	330	105	565/585	539	440.51	88.39/91.51	20-26/20-30	197	159	4-21	38	50
500	20″	467	363	130	620/650	593	491.6	96.99/101.68	20-26/20-33	197	159	4-21	41.15	65
600	24″	548	424	152	725/770	816	592.5	113.42/120.46	20-30/20-36	276	216	4-23	50.65	70
700	28″	595	510	165	840	895	695	109.65	24-30/24-36	300	254	8-18	55/63.35	80
800	32″	662	580	190	950	1015	794.7	124	24-33/24-39	300	254	8-18	55/63.35	80
900	36″	772	635	203	1050	1115	864.7	117.57	28-33/28-39	300	254	8-18	75	120
1000	40″	820	705	216	1160/1170	1230	965	129.89	28-36/28-42	300	254	8-18	85	140