Classification

Ventilation butterfly valve

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Classification:

Cast steel valve series

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400-6166669

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Description

A valve is a mechanical device that controls the flow rate, flow direction, pressure, temperature, etc. of a flowing fluid medium. Valves are the basic components in piping systems. Valve fittings, like pumps in technology, are often discussed as a separate category. The valve may be operated manually or with a hand wheel, handle or pedal, and may also be controlled to vary the pressure, temperature and flow rate of the fluid medium. The valve can perform continuous or repeated operations on these changes, such as safety valves installed in hot water systems or steam boilers. In more complex control systems, automatic control valves are used as required by external inputs (I. e., to adjust the changing set point of the flow through the pipeline). The automatic control valve does not need to be manually operated according to its input and setting, so that the valve can accurately control the various requirements of the fluid medium. Valves can also be divided into cast iron valves, cast steel valves, stainless steel valves, chromium molybdenum steel valves, chromium molybdenum vanadium steel valves, dual phase steel valves, plastic valves, non-standard customized valve materials, etc.

◆ Product overview

The ventilation butterfly valve uses a manual lever mechanism or an electric device to rotate the butterfly plate to open and close the valve, so as to reduce the air supply to the blast furnace without stopping the fan and discharge the excess gas into the atmosphere. It has the characteristics of short structure size, light weight and convenient installation. The valve drive torque is small, open and close flexible, easy to operate. The valve body is provided with a sealing retainer, and there is no visible gap between the sealing pairs, and the leakage rate is small. The expansion gap between the butterfly plate and the valve body is large, which can effectively prevent the sticking phenomenon caused by thermal expansion and contraction. The valve can be equipped with a variety of driving devices, such as manual devices, worm gear, pneumatic devices, electric devices.

◆ Product use

Ventilation butterfly valve is a non-sealed butterfly valve, widely used in building materials, petroleum, metallurgy, mining, electric power and other production industries, suitable for medium temperature ≤ 425 ℃, nominal pressure of 0.1MPa pipeline, used to regulate the flow of the medium.

◆ Executive standards

design and manufacture	Flange connection	Structure length	TEST AND INSPECTION
JB/T8692	GB/T9113、JB/T79、HG/T20592 EN1092-1 ASME B16.5/B16.47	GB/T12221	GB/T13927、JB/T9092

◆Main technical parameters

Nominal diameter	DN(mm)	50~2000
Nominal pressure	PN(MPa)	0.25	0.6
Test pressure (MPa)	Strength test	0.375	0.9
Test pressure (MPa)	Sealing test	0.275	0.66
Applicable media	Coal gas, dusty gas, flue gas, etc.
Drive form	Manual, worm gear drive, pneumatic drive, electric drive

◆ Material of main parts

Part Name	Materials
Valve body	Cast steel, chromium nickel molybdenum titanium steel, chromium molybdenum titanium steel and other special materials
Butterfly plate	Cast steel, alloy steel, chromium nickel molybdenum titanium steel special materials
Sealing ring	Cast steel, stainless steel, chromium nickel molybdenum titanium steel, chromium molybdenum titanium steel and other special materials
Stem	20Cr13, stainless steel, chromium nickel molybdenum titanium steel
Packing	Fluoroplastics, flexible graphite

◆ Selection of materials and applicable temperature

Material Variety	carbon steel	low temperature carbon steel	Alloy Steel		austenitic stainless steel	chromium molybdenum steel
Code	WCB	LCB	WC6/WC9	C5/C12	Chrome Cr-18 type 304, 316	12CrMoV
Maximum temperature resistance	425℃	345 ℃	595 ℃	650 ℃	600℃	560 ℃
Minimum temperature resistance	-29 ℃	-46 ℃	-29 ℃	-29 ℃	-196 ℃	-40 ℃
Applicable operating temperature	≤ 425 ℃	≤ 345 ℃	≤ 595 ℃	≤ 650 ℃	≤ 600 ℃	≤ 560 ℃

◆ Main outline connection dimension

Nominal diameter		Structure length (standard value)	Overall dimension (reference value)				Connection size (standard value)
Nominal diameter		Structure length (standard value)	Overall dimension (reference value)				0.25MPa				0.6MPa
mm	Inches	L	H	H0	A	B	D	D1	D2	Z-d	D	D1	D2	Z-d
50	2	108	70	286	125	193	140	110	88	4-14	140	110	88	4-14
65	2	112	80	306	125	193	160	130	108	4-14	160	130	108	4-14
80	3	114	95	334	125	193	190	150	124	4-18	190	150	124	4-18
100	4	120	105	354	125	193	210	170	144	4-18	210	170	144	4-18
125	5	120	120	384	125	193	240	200	174	8-18	240	200	174	8-18
150	6	120	132	409	125	193	265	225	199	8-18	265	225	199	8-18
200	8	140	160	593	165	183	320	280	254	8-18	320	280	254	8-18
250	10	140	187	650	165	283	375	335	309	12-18	375	335	309	12-18
300	12	170	220	715	165	283	440	395	363	12-22	440	395	363	12-22
350	14	170	245	814	175	334	490	445	413	12-22	490	445	413	12-22
400	16	190	270	863	175	334	540	495	463	16-22	540	495	463	16-22
450	18	190	297	918	175	334	595	550	518	16-22	595	550	518	16-22
500	20	190	322	1016	210	425	645	600	568	20-22	645	600	568	20-22
600	24	210	377	1128	210	425	755	705	667	20-26	755	705	667	20-26
700	28	210	430	1233	210	425	860	810	772	24-26	890	810	772	24-26
800	32	210	487	1344	210	425	975	920	878	24-30	975	920	878	24-30
900	36	250	537	1560	320	620	1075	1020	978	24-30	1075	1020	978	24-30
1000	40	250	587	1660	320	620	1175	1120	1078	28-30	1175	1120	1078	28-30
1200	48	250	687	1890	320	620	1375	1320	1280	32-30	1405	1340	1295	32-33
1400	56	300	760	2670	575	714	1575	1520	1480	36-30	1630	1560	1510	36-36
1600	64	300	895	2810	575	714	1790	1730	1690	40-30	1830	1760	1710	40-36
1800	72	300	995	2020	575	714	1990	1930	1890	44-30	2045	1970	1918	44-39
2000	80	300	1095	3220	656	810	2190	2130	2090	48-30	2265	2180	2125	48-42