Wafer lug type pneumatic butterfly valve

Body material	WCB,Ductile iron, ss304, ss316
Disc material	WCB,SS304,SS316,SS316L,1.4529,2507,aliminum bronze,nylon coating, nickel plating
Seal mateiral	NBR, EPFM, PTFE
Nominal pressure	PN16KG,PN10KG
Structure type	Midline
Control type	Single acting, double acting
Air supply	3-8bar
Pneumatic accessory	Solenoid valve, limit switch box, positioner, handle wheel, etc

Product parametersSize and dataworking principle

Wafer type pneumatic butterfly valve

Pneumatic butterfly valve introduction

Pneumatic butterfly valve is combined with pneumatic actuators and central line of butterfly valves. The valve stem drive the valve corn rolling 90 in the body which can realize the full

open or full close action. This product can according to the sealing performance into metal

seal and soft seal with compact structure、small volume、reliable operation、good sealing、easy maintenance、installation convenient and the adoptability is strong advantages. Can be widely used in petroleum、chemical industry、light industry、papermaking industrial、pharmaceutical、car automatic control system on a remote concentrated or local control.

Technical parameters

Body

Nominal size: DN40 -DN1000mm

Body material: WCB、Ductile iron, ss304, 316

Connection type: Wafer type, LT lug wafer type

Pressure class: PN1.0-1.6MPa

Structure type: Midline type

Valve components

Seat sealing: EPDM: -30~120℃

PTFE: -30℃～180℃

VITON: -30~150℃

NBR: -30~80℃

Disc material: Ductile iron nickel plating, nylon coating, aluminum bronze,

304, 316, 316L, 1.452, 2507

Stem material: 304、SS410

Applicable medium: Water, liquids, gas, oil, powder, steam, acid-base medium, etc.

Design and manufacturing standards

Design and manufacture: GB/T12238/2008

Connection standard: JB/T 79.1-1994

Face to face dimension: GB/T 12221-2005

Pressure testing: GB/T13927-2008

Actuators

Type	Control type	Function
Pneumatic actuator	Double acting	Failure to maintain
	Single acting normally closed	Failure to close
	Single acting normally open	Failure to open
	Optional accessory	Solenoid valve, limit switch box, air filter relief pressure valve, positioner, manual device.

Wafer lug type pneumatic butterfly valve

Outline size drawing:

Type specification table

Size	Inch	GB standard size(mm) PN10/PN16					Actuator size
Size	Inch	L	D2	H1	H2	n-Φd	A	P	B
50	2	42	125	193	80	4-16	163	96	76
65	2 1/2	45	145	212	89	4-16	195	115	91
80	3	45	160	232	95	8-16	195	115	91
100	4	52	180	280	114	8-16	217	137	11
125	5	55	210	302	127	8-16	258	147	122
150	6	55	240	330	139	8-20	299	165	136
200	8	60	295	419	175	8-20/12-20	349	182	153
250	10	66	350/355	482	203	12-20/12-24	397	199	173
300	12	76	400/410	553	242	12-20/12-24	473	221	192
350	14	76	460/470	635	267	16-20/16-24	560	249	213
400	16	86	515/525	709	301	16-24/16-27	601	280	243
450	18	105	565/585	750	381	20-24/20-27	738	383	356
500	20	130	620/650	840	387	20-24/20-30	738	383	356
600	24	151	725/770	1021	457	20-27/20-33	940	434	415

Pneumatic butterfly valve flow coefficient value

Size		Valve opening KV value
Size		10°	20°	30°	40°	50°	60°	70°	80°	90°
DN40	1-1/2′	0.7	2.4	6.9	14.2	22	36	59	81	113
DN50	2′	1.1	3.8	10.2	22	38	60	100	132	193
DN65	2-1/2′	2	7.5	18.2	35	61	95	187	240	315
DN80	3′	2.5	9.8	26	48	83	126	214	338	425
DN100	4′	3.8	14.6	39	72	119	221	361	606	723
DN125	5′	6.5	24	62	118	217	394	599	1038	1243
DN150	6′	10	42	95	175	326	542	873	1260	1859
DN200	8′	19	64	165	306	573	995	15567	2310	3124
DN250	10′	28	101	245	451	836	1462	2253	3256	4757
DN300	12′	34	129	312	615	1137	2125	3248	4991	7058
DN350	14′	47	163	390	795	1498	2573	3980	5749	8319
DN400	16′	62	231	508	1077	1971	3381	5385	8099	11468
DN450	18′	75	256	621	1208	2315	3925	6331	9474	13612
DN500	20′	103	346	859	1692	3086	5348	8513	13109	18748
DN600	24′	139	494	1153	2389	4466	7561	11945	18088	25217