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Home Products Butterfly Valves

Flange type ventilating type butterfly valve of the worm gear transmission

Available Size:

DN(mm)	40	50	65	80	100	150	200	250	300	350	400	450	500	600	650	700	750	800	900
NPS(inch)	1½"	2"	2½"	3"	4"	6"	8"	10"	12"	14"	16"	18"	20"	24"	26"	28"	30"	32"	36"

Purpose and characteristic

Ventilated butterfly valve use same material as body to process gasket, the suitable temperature is according to material of body, nominal pressure is＜0.6MPa,generally,it is utilized in pipe of industry, metallurgy,environmental protection ect.as ventilation and adjust medium flux.The main characteristic as below.
1.Novel and reasonable design,particular configuration,light,andopen and close rapidly.
2.Small operative moment, operation easily,laborsaving and skillful.
3.Use suitable material to satisfy low,middle,high different medium and corrosive medium etc.

■Adoption standard

Design standard:GB/T12238-1989 JB/T8692-1998
flange connection dimension:GB/T9115.1-2000
Structure length:GB/T12221-1989
Pressure test:GB/T13927-1992;JB/T9092-1999

Main technology parameter

Nominal diameter	DN（mm）	50～2000
Nominal pressure	PN（MPa）	0.05	0.25	0.6
Ps(MPa)Test pressure	Shell test	0.075	0.375	0.9
Ps(MPa)Test pressure	Seal test	≤1.5% Leakage
Appropriate medium	Coal gas,gas containing dust,flue gas
Drive modatlity	Hand drive,worm wheel drive, pneumatic drive, electric drive.

■Material for main parts

Parts name	Material
Body	Cast steel,stainless steel,Cr.Ni.Mo.Ti Steel,Cr.Mo.Ti Steel and ad hoc material
Disc	Cast steel,stainless steel,Cr.Ni.Mo.Ti Steel,Cr.Mo.Ti Steel and ad hoc material
Seal ring	Same as body of valve
Stem	Carbon steel,2Cr13,stainless steel,Cr.Ni.Mo.Ti steel
Packing	Fluorine plastic,flexible graphite

■ D4	0	W-	0.5	C、P、R、V connection dimension
			2.5
	1		6

通径（DN）	L	D1	D	z-d	H	H0	A	B	Wt/Kgs
50	108	110	140	4-14	70	215	270	65	9
65	112	130	160	4-14	80	235	270	65	12
80	124	150	190	4-18	95	263	270	65	15
100	127	170	210	4-18	105	283	270	65	17
125	140	200	240	8-18	120	313	310	65	23
150	140	225	265	8-18	132.5	338	310	65	25
200	152	280	320	8-18	160	493	365	90	42
250	165	335	375	12-18	187.5	550	365	90	60
300	178	395	440	12-22	220	615	365	90	80
350	190	445	490	12-22	245	678	365	90	100
400	216	495	540	16-22	270	727	365	90	120
450	222	550	595	16-22	297.5	782	365	90	160

■ D34	0		0.5	C、P、R、V connection dimension
		W-	2.5
	1		6

通径（DN）	L	D1	D	z-d	H	H0	A	B	D0	Wt/Kgs
50	108	110	140	4-14	70	443	193	125	80	51
65	112	130	160	4-14	80	463	193	125	80	62
80	114	150	190	4-18	95	483	193	125	80	73.5
100	127	170	210	4-18	105	498	193	125	80	87
125	140	200	240	8-18	120	682	193	245	150	98
150	140	225	265	8-18	132.5	736	193	245	150	102
200	152	280	320	8-18	160	800	283	245	150	150
250	165	335	375	12-18	187.5	895	283	313	200	170
300	178	395	440	12-22	220	956	334	313	200	220
350	190	445	495	12-22	245	1029	334	313	250	350
400	216	495	540	16-22	270	1103	425	313	250	430
450	222	550	595	16-22	297.5	1280	425	439	300	550
500	229	600	645	20-22	322.5	1186	425	431	360	580
600	267	705	755	20-26	377.5	1321	425	556	360	850
700	292	810	860	24-26	430	1431	620	556	360	950
800	318	920	975	24-30	487.5	1542	620	556	360	1150
900	330	1020	1075	24-30	537.5	1800	620	706	360	1750
1000	410	1340	1175	28-30	587.5	2363	620	706	360	2100
1200PN0.6	470	1320	1405	32-33	702.5	2583	620	706	360	2580
1200PN0.25	470		1375	32-30	687.5
1400	530		1420	36-30
1600	600		1620	40-33
1800	670		1820	44-39
2000	760		2020	48-42