Scope of application

This product is a two-way butterfly slag flushing valve developed by our company after years of dedicated research. This product solves the leakage problem of existing butterfly valves caused by valve seat wear. The service life and effect of the butterfly valve are improved, the maintenance cost is reduced, and the impact of maintenance on the project and production is reduced. It is an upgrade of butterfly valve technology.This product is widely used in steel, metallurgy, electric power, petroleum, petrochemical, chemical, tap water, paper making, pharmaceutical, environmental protection and other industries and departments.

Advantages of product structure

1. When the sealing pair between the valve seat and the butterfly plate is worn, the adjusting screw can compensate the wear of the sealing pair, ensure the sealing effect, and solve the problem that the existing butterfly valve can only be replaced or returned to the manufacturer for maintenance due to the wear of the sealing pair.When the medium in the fluid channel flows in the reverse direction and the pressure is large, the pressure makes the butterfly plate produce a small amount of displacement. The valve seat under the medium pressure further compresses the compressed spring, and the valve seat is close to the butterfly plate to achieve the reverse sealing effect. In this way, when the medium recovers to the positive flow and the outlet medium pressure decreases, the spring recovers some deformation, ensuring the sealing, and solving the problem of leakage caused by excessive outlet pressure of the valve.2. In the valve, the butterfly plate and the valve stem are connected through the interference fit between the pin shaft and the pin shaft hole. When the butterfly plate is deformed, part of the deformation will be stuck in the groove of the pin shaft. The grooved pin shaft can prevent the axial movement of the pin shaft, thus preventing the problem of falling off and ensuring the smooth opening and closing of the butterfly valve.3. The valve uses V-shaped packing, which can ensure the sealing effect and reduce the opening and closing torque of the valve.

Standards adopted

1. The design shall be in accordance with GB/T12,238-2008 Flanged and Wafer Joint Butterfly Valves for General Purpose Valves, API 608 Flanges, API 609 Lug and Flat Plate Butterfly Valves, and MSS SP-67-2002 Butterfly Valves.2. The pressure and temperature rating shall comply with GB/T12224 General Requirements for Steel Valves and API 609 Lug and Flat Plate Butterfly Valves3. Flanges shall comply with Raised Face Integral Steel Pipe Flanges (GB/T9113.1-2000), Integral Cast Iron Pipe Flanges (GB/T17241.6-1998), Cast Iron Pipe Flanges and Flanged Fittings (ASME B16.1), Pipe Flanges and Flanged Fittings (ASME B16.5), Large Diameter Flanges (ASME B16.47), and Round Flanges for Pipe Valves and Fittings (BS4504).4. The structural length shall comply with GB/T 12221-2005 Structural Length of Metal Valves or API 609 Lug and Flat Plate Butterfly Valves.5. The inspection and test shall be in accordance with GB/T13927-2008 Pressure Testing of Industrial Valves or API 598-2009 Inspection and Testing of Valves.

Main parts and materials

Part Name	Materials
Body	Cast steel, stainless steel, ductile iron
Seat	Stainless steel, hardfacing stellite and other hard alloys
Seal ring	Stainless steel and high-temperature resistant graphite plate are combined into multiple layers
Stem	2Cr13
Axle sleeve	Austenitic stainless steel, brass
Packing	Flexible graphite, PTFE
Packing gland	Cast steel, stainless steel
Bracket	Cast steel, stainless steel
Disc	Cast steel, stainless steel, ductile iron

Main external connection dimensions

Nominal diameter		Structure length(Standard value)		Overall dimension (reference value)										Connection size (standard value)
		L		H	D343SXH			D643SXH			D943SXH			PN1.0MPa
mm	in	Short	Long		H1	A1	B1	H2	A2	B2	H3	A3	B3	D	D1	Z-d
40	1 1/2	106	140	107	330	180	180	605	245	72	530	250	255	150	110	4-18
50	2	108	150	112	350	180	180	625	245	72	530	250	255	165	125	4-18
65	2 1/2	112	170	115	370	180	180	645	245	72	530	250	255	185	145	4-18
80	3	114	180	120	380	180	180	675	355	92	565	250	255	200	160	8-18
100	4	127	190	138	420	180	180	715	355	92	600	250	255	220	180	8-18
125	5	140	200	164	460	180	180	800	355	92	640	250	255	250	210	8-18
150	6	140	210	175	555	270	270	850	250	170	705	300	315	285	240	8-22
200	8	152	230	200	760	400	400	925	250	170	775	300	315	340	295	8-22
250	10	165	250	243	830	400	400	1035	450	220	945	300	315	395	350	12-22
300	12	178	270	250	895	450	450	1070	450	220	1070	300	315	445	400	12-22
350	14	190	290	280	950	450	450	1190	450	280	1140	300	315	505	460	16-22
400	16	216	310	305	1190	535	535	1250	650	280	1210	300	315	565	515	16-26
450	18	222	330	350	1255	535	535	1295	850	280	1335	575	714	615	565	20-26
500	20	229	350	380	1305	535	535	1455	850	380	1415	575	714	670	620	20-26
600	24	267	390	445	1340	570	570	1585	1250	380	1605	656	810	780	725	20-30
700	28	292	430	480	1520	750	750	1700	1250	380	1844	656	810	895	840	24-30
800	32	318	470	530	1710	750	750	1865	1500	380	2040	656	810	1015	950	24-33
900	36	330	510	580	1810	750	750	-	-	-	2255	785	863	1115	1050	28-33
1000	40	410	550	650	1960	900	900	-	-	-	2380	785	863	1230	1160	28-36
1200	48	470	630	760	2250	1000	1000	-	-	-	2640	785	863	1455	1380	32-39
1400	56	530	710	850	2435	1000	1000	-	-	-	2886	810	890	1675	1590	36-42
1600	64	600	790	1030	2780	1000	1000	-	-	-	3156	810	890	1915	1820	40-48
1800	72	670	870	1230	3020	1100	1100	-	-	-	3421	830	930	2115	2020	44-48
2000	80	760	950	1350	3270	1100	1100	-	-	-	3685	830	940	2325	2230	48-48
2200	88	-	1000	1450	3470	1200	1200	-	-	-	3885	-	-	2550	2440	52-56
2400	96	-	1100	1550	3670	1200	1200	-	-	-	4055	-	-	2760	2670	56-56
2600	104	-	1200	1650	3870	1300	1300	-	-	-	4260	-	-	2960	2850	60-56
2800	112	-	1300	1750	4080	1300	1300	-	-	-	4490	-	-	3180	3070	64-56
3000	120	-	1400	1850	4280	1400	1400	-	-	-	4690	-	-	3405	3290	68-62