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Electric power application industry

All metal sealed bidirectional pressure butterfly valve

Product Overview

It is the common choice of many domestic electric power, heat supply and chemical industry enterprises. Pressure grade: 2500LB, diameter: DN80-DN3000, use temperature: -196℃ -- 850℃.

Structural characteristics

One: two-way pressure
Three eccentric all-metal bidirectional pressure butterfly valve by the self-developed design software, analysis and optimization of the three eccentric parameters, improve the key parts of the form and position tolerance and dimensional tolerance accuracy, etc., to achieve the valve bidirectional pressure, can be installed in random direction. Two-way pressure through the national professional testing institutions.
Two: all metal sealing structure
The structure of conventional triple eccentric multi-level metal sealing butterfly valve is the metal sheet and graphite laminated installation. The graphite in the multi-level sealing surface is easy to be eroded by fluid, and the use is short.
The three eccentric all-metal bidirectional pressure butterfly valve sealing ring and seat is made of all-metal forging, sealing ring can be surfacing or spray welding all kinds of wear and temperature resistant alloy, its advantages are: anti-erosion, sealing pressure is small, small torque, long life, wear resistance.
Three: unique second eccentric design
Conventional three eccentric butterfly valve second eccentric directly to the stem offset valve body channel, sealing surface channel and valve body channel for the same axis, the body force is not uniform force.
The second eccentric is the offset of the sealing channel and the valve body channel, and the valve stem and the valve body channel in the same axis, so that the valve body on both sides of the symmetrical, uniform force.
Four: double bevel/surface sealing structure
Three eccentric all-metal two-way pressure butterfly valve sealing surface form using double bevel/surface sealing structure, reduce the radial eccentricity, greatly increased the sealing surface width, so that the valve sealing pressure is small, anti-friction, and reduce the operating torque of the valve.
Five: the sealing ring, valve stem and drive spline connection structure can be replaced on site
Three eccentric all-metal two-way pressure butterfly valve, the overall design service life of 50 years, seat and sealing ring heat-resistant water scour design life of 30 years.
We design the butterfly valve as equipment, so that each of its vulnerable parts can be replaced on the spot.
The valve stem and the butterfly plate, the valve stem and the drive, all adopt the spline connection structure, the force is uniform, the disassembly is convenient, reduces the long-term use and maintenance cost of the product.
Lower stem fixed shaft structure, better rigidity, can shorten the stem inserted into the butterfly plate connection, so that the channel flow resistance is smaller.

The upper stem has no pin and anti-blowout structure. The driving part is 10% smaller than the bearing part of the butterfly plate to prevent the internal stem from breaking.
The design structure of double stem solves the problem of inconsistent expansion between stem and disc and body caused by thermal expansion.
Six: two-way sealing zero leakage
The tri-eccentric all-metal bidirectional pressure butterfly valve can ensure that the bidirectional zero leakage under the nominal pressure of 1.1 times during the experiment, and the bidirectional zero leakage under the full pressure difference in use.
Seven: the real sense of the refractory structure
Conventional three eccentric multi-level metal sealing butterfly valve, multi-level sealing ring in high temperature soft materials and metal pieces easy to peel, and even make the metal sealing ring lose support, lose the sealing function, can not achieve the fire function.
And the country's three eccentric all-metal two-way pressure butterfly valve because of the all-metal seat and sealing ring sealing structure, fully adapt to high temperature conditions, and two-way zero leakage, can achieve the true sense of fire resistance function.
Eight: self-lubricating sleeve design, to a greater extent to solve the valve stem and stem hole locked problem. Dustproof structure of upper and lower bearings, and anti-crystallization structure with spiral groove can be added.
Nine: dynamic loading packing mechanism with disc spring: it can automatically compensate packing loss to prevent leakage of medium.

Execution standard

Welding size: GB/T 12224
Structure length: GB/T 12221-2005
Test and inspection: GB/T13927 GB/T26480

Performance parameter

Product specification: DN50~700mm
Pressure class: PN0.6~ 4.0mpa
Applicable medium: water, steam, oil, acid corrosive, etc
Applicable temperature: Carbon steel: -29℃~425℃ Stainless steel: -40℃~600℃
Transmission form: worm drive, pneumatic drive, electric drive, hydraulic drive

Product Dimensions

Nominal pressure PN0.6MPa									Nominal pressure PN1.0MPa
DN	Boundary dimensions							WT (kg)	Boundary dimensions							WT (kg)
mm	L	D	d	H	H1	A	B	WT (kg)	L	D	d	H	H1	A	B	WT (kg)
600	390	636	602	499	1280	570	660	450	390	636	602	499	1280	570	660	465
700	430	726	692	566	1480	750	550	660	430	726	692	566	1480	750	550	680
800	470	826	792	632	1608	750	550	780	470	826	792	632	1608	750	550	810
900	510	926	892	693	1857	750	550	820	510	926	892	693	1857	750	550	860
1000	550	1028	992	757	2038	900	750	1460	550	1028	992	757	2038	900	750	1625
1200	630	1228	1192	851	2237	1000	925	1590	630	1228	1192	851	2237	1000	925	1770
1400	710	1428	1392	876	2411	1000	925	2185	710	1428	1392	876	2411	1000	925	2425
1600	790	1628	1592	1095	2756	1000	925	3210	790	1628	1592	1095	2756	1000	925	3560
1800	870	1828	1792	1214	3093	1100	980	4090	870	1828	1792	1214	3093	1100	980	4545
2000	950	2028	1992	1332	3355	1100	980	5610	950	2028	1992	1332	3355	1100	980	6230

Nominal pressure PN1.6MPa										Nominal pressure PN1.6MPa
DN	Boundary dimensions							WT (kg)	DN	Boundary dimensions							WT (kg)
mm	L	D	d	H	H1	A	B	WT (kg)	mm	L	D	d	H	H1	A	B	WT (kg)
80	114	90	78	90	356	180	200	27	600	390	636	602	509	1369	570	660	457
100	127	110	96	100	375	180	200	34	700	430	726	692	572	1492	750	550	810
125	140	135	121	113	401	180	200	41	800	470	826	792	638	1622	750	550	1093
150	210	161	146	130	450	270	280	43	900	510	926	892	700	1924	750	550	1410
200	230	222	202	205	545	400	425	81	1000	550	1028	992	765	2054	900	750	1870
250	250	278	254	235	630	400	425	102	1200	630	1228	1192	860	2259	1000	925	2082
300	270	330	303	275	715	450	560	132	1400	710	1428	1392	986	2610	1000	925	2850
350	290	382	351	309	817	450	560	164	1600	790	1628	1592	1106	2856	1000	925	4235
400	310	432	398	346	923	535	580	193	1800	870	1828	1792	1226	3121	1100	980	5346
450	330	484	450	392	1059	535	580	238	2000	950	2028	1992	1345	3385	1100	980	7328
500	350	535	501	427	1126	535	580	302	-	-	-	-	-	-	-	-	-

Nominal pressure PN2.5MPa										Nominal pressure PN4.0MPa
DN	Boundary dimensions							WT (kg)	Boundary dimensions							WT (kg)
mm	L	D	d	H	H1	A	B	WT (kg)	L	D	d	H	H1	A	B	WT (kg)
80	114	90	78	90	356	180	200	38	180	90	78	108	430	180	200		39
100	127	110	96	106	387	180	200	40	190	110	96	108	392	180	200		50
125	140	135	121	122	413	180	200	60	200	135	120	120	414	180	200		75
150	210	161	146	136	459	270	280	65	210	161	145	135	494	270	280		100
200	230	222	202	215	585	400	425	85	230	222	200	202	578	400	425		135
250	250	278	254	247	649	400	425	135	250	278	252	235	673	400	425		190
300	270	330	303	288	771	450	560	175	270	330	301	280	793	450	560		240
350	290	382	351	333	929	450	560	195	290	382	351	315	921	450	560		320
400	310	432	398	359	993	535	580	295	310	432	398	355	1021	535	580		450
450	330	484	450	405	1053	535	580	350	330	484	448	370	1143	535	580		500
500	350	535	501	444	1245	535	580	510	350	535	495	420	1192	535	580		560
600	390	636	602	521	1750	570	660	625	390	636	595	490	1327	570	660		720
700	430	726	692	586	1519	750	550	925	-	-	-	-	-	-	-		-
800	470	826	792	659	1659	750	550	1260	-	-	-	-	-	-	-		-
900	510	926	892	720	1829	750	550	1790	-	-	-	-	-	-	-		-
1000	550	1028	992	780	1949	900	750	1940	-	-	-	-	-	-	-		-
1200	630	1228	1192	889	2243	1000	925	2810	-	-	-	-	-	-	-		-
1400	710	1428	1392	1000	2262	1000	925	3500	-	-	-	-	-	-	-		-

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