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Steel smelting industry

Hard seal butterfly valve

Product Overview

Hard seal butterfly valve is designed by our technicians after absorbing the structure and characteristics of similar foreign products and overcoming the defects existing in the use of the original products, so that the service life is more durable and the seal is more reliable.Eccentric butterfly valve USES the three dimensional design principle of sealing pair is composed of two overlapping cones inclined section, butterfly plate rotation center after the eccentric value of valve body, valve seat, realize the opening and closing of instantaneous contact and separation, and the disc sealing ring metal and graphite layer structure to realize labyrinth seal, can make the small torque of valve butterfly valve sealing performance, and can guarantee two-way pressure butterfly valve adopts reduce eccentric value and enhance the butterfly plate, the strength of the valve spindle, actuators, etc to support zero import and export bidirectional sealing leakage.

Structural characteristics

1. The inclined elliptical butterfly plate radial dynamic balance sealing system is adopted, the force on both sides of the valve inlet and outlet is approximately balanced, the opening torque of the valve is small, the positive and reverse sealing performance is reliable, and the bidirectional pressure bearing capacity is 100%;
2. The sealing surface of the valve is made of integral metal sealing ring, which is machined with high precision. The sealing cross-section is elliptical, which forms a sealing pair with the metal sealing surface of the valve seat. When the valve is opened and closed, the sealing surface of butterfly plate contacts or disengages instantaneously along the 360 ° circle, which can quickly and accurately realize the opening or closing action;
3. Three eccentric structure is adopted, that is, an angle eccentricity is added on the basis of double eccentric butterfly valve.

Execution standard

Design specification: GB/T 12238, JB/T8527
Flange connection: GB/T 9113, JB/T79, HG20592
Structure length: GB/T12221
Tests and inspection: GB/T13927

Performance parameter

Main material: cast steel, stainless steel, chromium-molybdenum steel, alloy steel, duplex steel
Product model: DS343H
Product specification: DN50~2000mm
Pressure class: PN0.6~ 4.0MPa
Applicable medium: air, water, steam, gas, oil, acid, alkali, salt with weakly corrosive medium, etc
Applicable temperature: Carbon steel: -29℃~425℃ Stainless steel: -40℃~600℃
Driving mode: worm drive, pneumatic drive, electric drive, hydraulic drive

Product Dimensions

DN		Structure length (standard)		Boundary dimensions (reference)				Connection dimensions (standard)
		L		H	D343H			PN0.25MPa			PN0.6MPa			PN1.0MPa
mm	inches	short	long		H1	A1	B1	D	D1	Z-d	D	D1	Z-d	D	D1	Z-d
40	1 1/2	106	140	107	330	180	200	130	100	4-14	130	100	4-14	150	110	4-18
50	2	108	150	112	350	180	200	140	110	4-14	140	110	4-14	165	125	4-18
65	2 1/2	112	170	115	370	180	200	160	130	4-14	160	130	4-14	185	145	4-18
80	3	114	180	120	380	180	200	190	150	4-18	190	150	4-18	200	160	8-18
100	4	127	190	138	420	180	200	210	170	4-18	210	170	4-18	220	180	8-18
125	5	140	200	164	460	180	200	240	200	8-18	240	200	8-18	250	210	8-18
150	6	140	210	175	555	270	280	265	225	8-18	265	225	8-18	285	240	8-22
200	8	152	230	200	760	400	425	320	280	8-18	320	280	8-18	340	295	8-22
250	10	165	250	243	830	400	425	375	335	12-18	375	335	12-18	395	350	12-22
300	12	178	270	250	895	450	560	440	395	12-22	440	395	12-22	445	400	12-22
350	14	190	290	280	950	450	560	490	445	12-22	490	445	12-22	505	460	16-22
400	16	216	310	305	1190	535	580	540	495	16-22	540	495	16-22	565	515	16-26
450	18	222	330	350	1255	535	580	595	550	16-22	595	550	16-22	615	565	20-26
500	20	229	350	380	1305	535	580	645	600	20-22	645	600	20-22	670	620	20-26
600	24	267	390	445	1340	570	660	755	705	20-26	755	705	20-26	780	725	20-30
700	28	292	430	480	1520	750	550	860	810	24-26	860	810	24-26	895	840	24-30
800	32	318	470	530	1710	750	550	975	920	24-30	975	920	24-30	1015	950	24-33
900	36	330	510	580	1810	750	550	1075	1020	24-30	1075	1020	24-30	1115	1050	28-33
1000	40	410	550	650	1960	900	750	1175	1120	28-30	1175	1120	28-30	1230	1160	28-36
1200	48	470	630	760	2250	1000	925	1375	1320	32-30	1405	1340	32-33	1455	1380	32-39
1400	56	530	710	850	2435	1000	925	1575	1520	36-30	1630	1560	36-36	1675	1590	36-42
1600	64	600	790	1030	2780	1000	925	1790	1730	40-30	1830	1760	40-36	1915	1820	40-48
1800	72	670	870	1230	3020	1100	980	1990	1930	44-30	2045	1970	44-39	2115	2020	44-48
2000	80	760	950	1350	3270	1100	980	2190	2130	48-30	2265	2180	48-42	2325	2230	48-48

DN		Structure length (standard)		Boundary dimensions (reference)				Connection dimensions (standard)
				H	D343H			PN1.6MPa			PN2.5MPa
		L
mm	inches	short	long		H1	A1	B1	D	D1	Z-d	D	D1	Z-d
50	2	108	150	112	350	180	200	165	125	4-18	165	125	4-18
65	2 1/2	112	170	115	370	180	200	185	145	4-18	185	145	8-18
80	3	114	180	120	380	180	200	200	160	8-18	200	160	8-18
100	4	127	190	138	420	180	200	220	180	8-18	235	190	8-22
125	5	140	200	164	460	180	200	250	210	8-18	270	220	8-26
150	6	140	210	175	555	270	280	285	240	8-22	300	250	8-26
200	8	152	230	200	760	400	425	340	295	12-22	360	310	12-26
250	10	165	250	243	830	400	425	405	355	12-26	425	370	12-30
300	12	178	270	250	895	450	560	460	410	12-26	485	430	16-30
350	14	190	290	280	950	450	560	520	470	16-26	555	490	16-33
400	16	216	310	305	1190	535	580	580	525	16-30	620	550	16-36
450	18	222	330	350	1255	535	580	640	585	20-30	670	600	20-36
500	20	229	350	380	1305	535	580	715	650	20-33	730	660	20-36
600	24	267	390	445	1340	570	660	840	770	20-36	845	770	20-39
700	28	292	430	480	1520	750	550	910	840	24-36	960	875	24-42
800	32	318	470	530	1710	750	550	1025	950	24-39	1085	990	24-48
900	36	330	510	580	1810	750	550	1125	1050	28-39	1185	1090	28-48
1000	40	410	550	650	1960	900	750	1255	1170	28-42	1320	1210	28-56
1200	48	470	630	760	2250	1000	925	1485	1390	32-48	1530	1420	32-56
1400	56	530	710	850	2435	1000	925	1685	1590	36-48	1755	1640	36-62
1600	64	600	790	1030	2780	1000	925	1930	1820	40-56	1975	1860	40-62
1800	72	670	870	1230	3020	1100	980	2130	2020	44-56	2195	2070	44-70
2000	80	760	950	1350	3270	1100	980	2345	2230	48-62	2425	2300	48-70

DN		Structure length (standard)		Boundary dimensions (reference)				Connection dimensions (standard)
		Structure length (standard)		H	D343H			PN4.0MPa
		L			D343H			PN4.0MPa
mm	inches	short	long		H1	A1	B1	D	D1	Z-d
50	2	108	150	112	350	180	200	165	125	4-18
65	2 1/2	112	170	115	370	180	200	185	145	8-18
80	3	114	180	120	380	180	200	200	160	8-18
100	4	127	190	138	420	180	200	235	190	8-22
125	5	140	200	164	460	180	200	270	220	8-26
150	6	140	210	175	555	270	280	300	250	8-26
200	8	152	230	200	760	400	425	375	320	12-30
250	10	165	250	243	830	400	425	450	385	12-33
300	12	178	270	250	895	450	560	515	450	16-33
350	14	190	290	280	950	450	560	580	510	16-36
400	16	216	310	305	1190	535	580	660	585	16-39
450	18	222	330	350	1255	535	580	685	610	20-39
500	20	229	350	380	1305	535	580	777	670	20-42

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