Large-Diameter Pneumatic Ventilation Butterfly Valve Flange Type

• Media: Gas
• Driving Mode: Pneumatic
• Connection Form: Flange
• Structure: Centre Sealing
• Seal Form: Body Sealing
• Valve Stem: Normal
• Model NO.: D641W-2.5C
• Work Pressure: Low Pressure (Pn<1.6mpa)
• Working Temperature: -20-400°c
• Material of Seal Surface: Body Sealing
• Standard: GB
• Application: Industrial Usage
• Transport Package: Wooden Case
• Specification: DN50-DN5000
• Trademark: bvmc
• Origin: China
• HS Code: 8481804090
• Production Capacity: Annual Production Capacity of 100000 Tons

Product Description

The working principle and advantages of ventilation butterfly valves
The pneumatic ventilation butterfly valve is welded with steel plates and has the characteristics of short structure, light weight, and convenient installation. Small driving torque, flexible opening and closing, and convenient operation. The valve body is equipped with a sealing ring, and there is no visible gap between the sealing pairs, resulting in a low leakage rate. The expansion gap between the butterfly plate and the valve body is large, which can effectively prevent the jamming caused by Thermal expansion. It can be equipped with various driving devices, such as manual devices, turbine transmission devices, starting devices, and electric devices. Ventilation butterfly valves are widely used in industrial pipelines such as metallurgy, petrochemicals, power, building materials, mines, etc. to control or regulate medium gases. The pneumatic ventilation butterfly valve has a wide range of applications and can be self assembled.

Pneumatic ventilation butterfly valves are mainly installed in pipelines, playing a role in ventilation and exhaust. The valve body is made of cast iron, carbon steel, and stainless steel. The pneumatic ventilation butterfly valve uses the same material as the valve body to make a sealing ring. The applicable temperature depends on the selection of valve body material. Nominal pressure ≤ 0.6MPa. It has the characteristics of large capacity and high adjustment accuracy.
The pneumatic ventilation butterfly valve is welded with steel plates and has the characteristics of short structure, light weight, and convenient installation. Small driving torque, flexible opening and closing, and convenient operation. The valve body is equipped with a sealing ring, and there is no visible gap between the sealing pairs, resulting in a low leakage rate. The expansion gap between the butterfly plate and the valve body is large, which can effectively prevent the jamming caused by Thermal expansion. It can be equipped with various driving devices, such as manual devices, turbine transmission devices, starting devices, and electric devices. Ventilation butterfly valves are widely used in industrial pipelines such as metallurgy, petrochemicals, power, building materials, mines, etc. to control or regulate medium gases. The pneumatic ventilation butterfly valve has a wide range of applications and can be self assembled.

Pneumatic ventilation butterfly valves are mainly installed in pipelines, playing a role in ventilation and exhaust. The valve body is made of cast iron, carbon steel, and stainless steel. The pneumatic ventilation butterfly valve uses the same material as the valve body to make a sealing ring. The applicable temperature depends on the selection of valve body material. Nominal pressure ≤ 0.6MPa. It has the characteristics of large capacity and high adjustment accuracy.
Main external connection dimensions of pneumatic ventilation butterfly valve:

DN(mm)	L	H	0.05-0.1MPa				0.25MPa				0.6MPa
			D	D1	D2	n-d	D	D1	D2	n-d	D	D1	D2	n-d
100	127	105	210	190	144	4-18	210	170	144	4-19	210	170	144	4-19
125	140	120	240	200	174	8-18	240	200	174	8-19	240	200	174	8-19
150	140	132	265	225	199	8-18	265	225	199	8-19	265	225	199	8-19
200	152	160	320	280	254	8-18	320	280	254	8-19	320	280	254	8-19
250	165	187	375	335	309	12-18	375	335	309	12-19	375	335	309	12-19
300	180	220	440	395	363	12-22	440	395	363	12-23	440	395	363	12-23
350	180	245	490	445	413	12-22	490	445	413	12-23	490	445	413	12-23
400	200	270	540	495	463	16-22	540	495	463	16-23	540	495	463	16-23
450	200	297	595	550	518	16-22	595	550	518	16-23	595	550	518	16-23
500	220	322	645	600	568	20-22	645	600	568	20-23	645	600	568	20-23
600	220	377	755	705	667	20-26	755	705	667	20-26	755	705	667	20-26
700	240	430	860	810	772	24-26	860	810	772	24-26	860	810	772	24-26
800	240	487	975	920	878	24-30	975	920	878	24-30	975	920	878	24-31
900	260	538	1075	1020	978	24-30	1075	1020	978	24-30	1075	1020	978	24-31
1000	260	587	1175	1120	1078	28-30	1175	1120	1078	28-30	1175	1120	1078	28-31
1200	280	702	1375	1320	1280	32-30	1375	1320	1280	32-30	1405	1340	1295	32-34
1400	300	782	1575	1520	1480	36-30	1575	1520	1480	36-30	1630	1560	1510	36-37
1600	320	895	1790	1730	1690	40-30	1790	1730	1690	40-30	1830	1760	1710	40-37
1800	340	995	1990	1930	1890	44-30	1990	1930	1890	44-30	2045	1970	1918	44-40
2000	360	1095	2190	2130	2090	48-30	2190	2130	2090	48-30	2265	2180	2125	48-43