First, the product details

1, ventilation butterfly valve design, reasonable, unique structure, light weight, quick opening and closing. 
2, butterfly valve torque is small, easy to operate, labor-saving smart. 
3, the use of adaptive materials to meet the low, medium and high temperature of different media and corrosive media. 
4, there is no connecting rod, bolts, etc., reliable, long service life, not affected by the media flow.
 

Second, the standard
Design of ventilation butterfly valve design and manufacturing standards: GB / T 12238-1989; JB / T8692-1998 
Structure length standards: GB / T 12221-2005 
Flange standards: GB / T 9115.1 
Pressure temperature rating: GB / T 12224- 2005 
Test test standard: GB / T 13927-2008
 

Third, the main technical parameters

Nominal diameter	DN (mm)	50 ~ 2000
Nominal pressure	PN (MPa)	0.05	0.25	0.6
Test pressure Ps (MPa)	Strength test	0.075	0.375	0.9
	Seal test	≤ 1.5% leakage
Suitable media	Gas, dust gas, flue gas and so on
Drive form	Manual, worm gear drive, gas drive, electric drive

 Fourth, the ventilation valve parts materials and conditions

Part Name	material
Body	Cast steel, stainless steel, chrome nickel molybdenum titanium steel, chromium molybdenum titanium steel and other special materials
Butterfly plate	Cast steel, stainless steel, chrome nickel molybdenum titanium steel, chromium molybdenum titanium steel and other special materials
Sealing ring	Same as valve body
Valve stem	Carbon steel, 2Crl3, stainless steel, chromium nickel molybdenum titanium steel
filler	Flexible graphite

 Fifth, the selection of butterfly valve sealing materials and temperature

Material variety	Carbon steel	Low temperature carbon steel	alloy steel		Austenitic stainless steel	Chrome-molybdenum steel
Code	WCB	LCB	WC6 or WC9	C5 or C12	Chromium Cr-18 type, 304,31 6	12CrMoV
Resistance to the highest temperature	425 ° C	345 ° C	595 ° C	650 ° C	600 ° C	560 ° C
Resistance to the lowest temperature	-29 ° C	-46 ° C	-29 ° C	-29 ° C	-196 ° C	-40 ℃
Suitable for working temperature	≤ 25 ℃	≤345 ℃	≤595 ℃	≤ 650 ℃	≤600 ℃	≤560 ℃

 Sixth, the connection size

Nominal diameter		Structure length  (standard value)	Dimensions  (reference value)		Connection size (standard value)								Reference weight  (kg)
					0.05MPa, 0.25MPa				0.6MPa
mm	inch	L	H	H1	D	D1	D2	Zd	D	D1	D2	Zd
100	4	120	105	219	210	170	144	4-18	210	170	144	4-18	20
125	5	120	120	234	240	200	174	8-18	240	200	174	8-18	25
150	6	120	132	247	265	225	199	8-18	265	225	199	8-18	29
200	8	140	160	403	320	280	254	8-18	320	280	254	8-18	47
250	10	140	187	433	375	335	309	12-18	375	335	309	12-18	67
300	12	170	220	465	440	395	363	12-22	440	395	363	12-22	78
350	14	170	245	539	490	445	413	12-22	490	445	413	12-22	96
400	16	190	270	543	540	495	463	16-22	540	495	463	16-22	130
450	18	190	297	571	595	550	518	16-22	595	550	518	16-22	142
500	20	190	322	644	645	600	568	20-22	645	600	568	20-22	191
600	24	210	377	701	755	705	667	20-26	755	705	667	20-26	230
700	28	210	430	753	860	810	772	24-26	860	810	772	24-26	250
800	32	210	487	807	975	920	878	24-30	975	920	878	24-30	320
900	36	250	537	973	1075	1020	978	24-30	1075	1020	978	24-30	410
1000	40	250	587	1023	1175	1120	1078	28-30	1175	1120	1078	28-30	510
1200	48	250	687	1153	1375	1320	1280	32-30	1405	1340	1295	32-33	720
1400	56	300	760	1810	1575	1520	1480	36-30	1630	1560	1510	36-36	1270
1600	64	300	895	1815	1790	1730	1690	40-30	1830	1760	1710	40-36	1730
1800	72	300	995	1920	1990	1930	1890	44-30	2045	1970	1918	44-39	2750
2000	80	300	1095	2025	2190	2130	2090	48-30	2265	2180	2125	48-42	3050

Ventilation butterfly valve temperature is subject to the selection of the valve body, the nominal pressure ≤ 1.0MPa, generally applicable to industry, metallurgy, environmental protection, chemical industry, building materials, power plants, glass and other industries in the ventilation, environmental engineering dust or hot air gas pipeline , As a gas medium to regulate the flow or cut off the pipeline control device. Ventilation butterfly valve in the pipeline should be installed horizontally.