Pneumatic vent butterfly valve, made of steel plate through welding, has the advantages of small size, light weight, convenient utilization. For small torque, it is easy to open or close the valve. Body has oil seal retainer. There is large expansion clearance between the disc and body, which can avoid sticking caused by thermal expansion and contraction. The valve can be equipped with varieties of actuating device, such as handwheel, gear box, electric actuator and pneumatic actuator.Vent butterfly valve is widely used in metallurgy, petroleum and other industries, to regulate gas.

 

Parameter 

Nominal pressure(MPa)	0.05MPa	Medium temperature	-30℃～-350℃
Strength test	0.1MPa	Applicable medium	Cold or hot air, smoke
Medium flow rate	25m/s	Leakage rate	3%

Components materials

Components	Valve body	Valve plate	Valve shaft
Materials	Carbon steel	Carbon steel	Carbon steel, stainless steel

 
Connection Dimensions(unit: mm)

DN	D	D1	L	L1	L2	n-Фd	b
300	405	370	120	716	220	8-12	10
350	455	420	140	786	240	8-14	10
400	505	470	140	924	270	12-18	10
450	570	530	160	999	295	12-18	10
500	620	580	160	1079	325	12-18	10
600	720	680	180	1140	380	16-18	12
700	820	780	180	1240	430	16-18	12
800	920	880	200	1350	490	16-18	12
900	1040	990	200	1450	540	16-18	14
1000	1140	1090	220	1550	590	20-18	14
1100	1240	1190	220	1800	640	20-18	14
1200	1340	1290	240	1900	690	20-18	14
1300	1440	1390	240	2020	760	20-18	16
1400	1540	1490	260	2120	810	24-18	16
1500	1640	1590	260	2220	860	24-18	16
1600	1740	1690	280	2390	980	24-18	16
1700	1840	1790	280	2590	1030	28-22	16
1800	1940	1890	300	2709	1096	28-22	16
1900	2040	1990	300	2826	1146	32-22	16
2000	2150	2090	320	2926	1196	32-26	16
2200	2360	2300	340	3126	1296	36-26	16
2400	2560	2500	360	3326	1396	36-26	18
2600	2760	2700	380	3526	1496	40-26	18
2800	2960	2900	400	3726	1596	40-26	18
3000	3190	3110	400	4098	1698	44-30	18
3200	3390	3310	440	4338	1798	44-30	20
3400	3590	3510	440	4578	1898	48-30	20
3600	3790	3710	480	4780	1998	48-30	20
3800	4000	3910	480	5000	2098	52-30	22
4000	4210	4120	520	5200	2210	52-30